QUESTION BANK FINAL

651 9. MBACLTENKSE - Kestenbaum 10. ESLILBAT - Guidance VIII. GIVE THE REASON : 1.What is the purpose of closed circuit television? Page no :Khurana (2 93 ) 2.What is a carrier lens? Page no :Khurana ( 297) 4.Stand magnifiers are useful for children Page no :Khurana ( 293 ) 5.Notex is an non-optical device why? Page no :Khurana ( 293 ) 6. Why should LVA patient using hand magnifier use bifocal glass? Page no :Khurana ( 297) IX. TWO MARK QUESTIONS : 1.Define low vision- Page no :Khurana ( 293 ) 2.Write about low vision aids Page no :. Khurana( 294 ) 3. Define low vision Page no :Khurana ( 293 ) 4.Write two near and distance vision aid Page no :Khurana (2 93 ) REFRACTION DEPARTMENT-CBE

652 5.Write short notes on aspheric lens Page no :Manual ( 98 ) 6.Who invented low vision? Page no :Khurana ( 93 ) 7.Define low vision Page no :Khurana (2 93 ) 8.What are the causes of low vision? Page no :Khurana ( 293 ) 9.What are the optical devices given for low vision patients? Page no :Khurana (2 93 ) 10.What are the non optical devices for low vision patients? Page no :Khurana ( 300 ) 11.Name the device used for distance vision? Page no :Khurana ( 293 ) 12.Name the device used for near vision? Page no :Khurana ( 293 ) 13.CCTV abbreviation? Page no :Khurana ( 299 ) 14.Write the kestenbaum formula? Page no :Manual (100 ) 15.Write the magnifier types? Page no :Khurana (2 93 ) 16.Name the condition in which patient has overall blurred vision Page no :Khurana ( 298 )

653 17.Write the two telescope name? Page no :Khurana ( 298 ) 18.Which patient require slab of prism? Page no :Khurana ( 293 ) 19.Which telescope have convex eye piece, convex object? Page no :Khurana ( 298 ) 20.What is the other name of signature guide? Page no :Khurana ( 293 ) 21.What are the categories in low vision devices? Page no :Khurana ( 294 ) 22.Name the conditions in which patient have central vision loss Page no :Khurana ( 293 ) X. DIAGRAM : Page no :Manual ( 98 ) 1.Optical and non-optical aids Page no : Manual ( 98 ) XI. TEN MARK QUESTIONS : REFRACTION DEPARTMENT-CBE 1. Explain about the low vision aids .

654 XII. ENGLISH TO TAMIL : 1. Signature guide - வகசயாப்பைழிகாட்டி குவறபார்வை 2. Low vision - ஒளியியல்சாதைம் வகயால்உருப்சபருக்கி 3. Optical device - ஒளியியல்அல்லாதசாதைம் சதாவலகநாக்கி 4. Hand magnifier - மறுைாழ்வு உருப்சபருக்கம் 5. Non optical device - மூடியசுற்றுசதாவலகநாக்கு 6. Telescope - தத்துைம் இலக்குகள் 7. Rehabilitation - ககாரிக்வக மதிப்படீ ு 8. Magnification - 9. Closed circuit - கருைிழிசிவதவு குழாய்புலம் television உட்குறிப்பு உளைியல் 10.Physiology - 11.Goals - 12.Required - 13.Evaluation - 14.Corneal - degeneration 15.Tubular field - 16.Implication - 17.Psychological-

655 XIII. CORECT SENTENCE : 1. Gerald Fonda coined the term low vision in the year 1963 . Ans : 1953 2. Stand magnifier have not a constant magnification. Ans : Constant 3. In a stand magnifier the image formed is between infinity and the rays are converging. Ans : Diverging 4. The patients best acuity is 6/60 then its reciprocal will be 60/6 = 20D Ans : +10D REFRACTION DEPARTMENT-CBE

656 WORKSHEET 1. Write about the optic of LVA 2. Explain about the light houses method 3. What are the formulae used in predicted add

657 4. Difference between the hand and stand magnifier. 5. When the patient have BE’S vision 2/60, Which types of aid will you prescribe? 6. The patient has to do more of near work he needs magnifier’s help. So which type of magnifier you will prescribe and why? 7. Why will we use stand magnifier in children? REFRACTION DEPARTMENT-CBE

658 8. Write about counseling and guidance of LVA. 9. Write about difference between the types of telescope? 10.Write about the advantages of closed circuit television?

659 11.Write about the advantages and disadvantages of the stand magnifier. 12.Which type of glass will we prescribe for a patient with macular pathology and why: REFRACTION DEPARTMENT-CBE

660 CHAPTER 13 DISPENSING OF OPTICS

661 CHAPTER 13 DISPENSING OF OPTICS CONTENTS Material used in spectacle lens • Glass • Plastic Types of corrective lenses Rules of simple transposition Rule of toric transposition Multifocal lenses and design Tinted lens and photochromatic lenses Safety lens Lens power measuring methods Trouble shooting techniques. REFRACTION DEPARTMENT-CBE

662 I. ABBERIVATION : - Crown Glass - Flint Glass 1. CG - Cellulose Nitrate 2. FG - Stainless steel 3. CN - Good Starch Resistance 4. SS - Hi Index Lens 5. GSR - Toroidal shape 6. HIL - Zeiss Dura let lens 7 TS - Amber Red 8. ZDL - Retinitis Pimentos 9. AR - Progressive power lens 10. RP - Tinted lens 11 PPL - Photo chromic lens 12. TL - Boro silicate glass 13. PL - Aluminum phosphate glass 14. BSG - Transmittance Range 15. APG 16. TR

17. FR 663 18. LC 19. PE - Fading Rate 20. LC - Lens Cent ration 21. RX - Prismatic Effect 22. EG - Lens Cutting 23. BF - Prescription 24. RAP - Eye Glasses 25. HP - Bifocal 26. VP - Reading Addition Power 27. VAP - Horizontal Power - Vertical Power - Visual Axis Distance II. CHOOSE THE BEST ANSWER: 1.If the eyepiece focusing is not accurate what will happen during the neutralization …........ A] Break the eyeglass B] Error reading C] The spherical will change to cylinder Ans : B]Error reading 2. Refractive prescription is important for ……... A] Spectacle power B] IOL power C] Corneal curvature Ans : A] Spectacle power REFRACTION DEPARTMENT-CBE

664 3. ……….. Provides information about types of corrective lenses materials used in lens manufacture. A] Optics B] Refraction C] Dispensing of optics Ans : C] Dispensing of optics 4. …………. introduced special optical measurement and proper fitting correction of eye glass A] Optics B] Refraction C] Dispensing of optics Ans : C] Dispensing of optics 5.Spectacle materials are made from ………. Different source of materials. A] 3 B] 4 C] 5 Ans : A] 3 6. …………….. Is one of the materials used in spectacle lens? A] Plastic B] Water C] Both Ans : A] Plastic 7. Glass&plastic material used for ……… A] Spectacle lens B] Trial frame C] Contact lens Ans : A] Spectacle lens 8. ……. Is semi-precious stone in making lens? A] Rock crystal B] Topaz C] Platinum Ans : B] Topaz

665 9. ……..glass is used in the making of bifocal or achromatic lens A] Crown glass B] flint glass C] CR39 Ans : B] flint glass 10. ………..material was replaced by barium crown material& no chromatic aberration A] Crown glass B] flint glass C] CR39 Ans : B] flint glass 11. Plastic lens made of ……...... A] Barium –crown B] Poly methyl metho acrylate C] Alley glycol carbonate Ans : B] Poly methyl metho acrylate 12. The base curve should have same curvature which coincides with the ……………of the rotating eyeball A] Corneal curvature B] Lens curvature C] Glass curvature Ans : A] Corneal curvature 13. How many types of principle eyeglass lenses are manufactured to correct vision……........ A] 2 types B] 3 types C] 5 types Ans : A] 2 types 14. ….….lens provides correction for only one distance REFRACTION DEPARTMENT-CBE

666 B]Bi-focal C] Tri- focal Ans : A] Mono focal A] Mono focal 15. ….…is the different lens forms or the possible contours of the lens surface A] Lens form B] Frame form C] Glass Ans : A] Lens form 16. All spectacle lenses are meniscus lenses having …........... A] Concave B] Convex C] Concave- convex Ans : C] Concave- convex 17. Different lens forms have ….......benefits A] Same B] Different C] One only Ans : B] Different 18. …........has a complex front surface that gradually changes the lens curvature from the center to periphery A] Aspheric B] Lenticular C] Hi-index Ans : A] Aspheric 19.Distance between the front of the cornea and back of the lens ...... A] Vertex distance B]Focal length C] Lens power Ans : A] Vertex distance

667 20.There is no jump effect in ......... A] Varifocal lenses B] Trifocal lenses C] Bifocal lenses Ans : A] Varifocal lenses 21. Back vertex distance is measured using a ....... A] Optician ruler B] Distometer C] Lenso meter Ans : B] Distometer 22.For positive powers more than +10.0ds the form of the lens used is …............... A] Convex B]Aspheric C]Lenticular Ans : C]Lenticular 23.D-shaped bifocal segment height was …............. A]22 to 24mm B]25 to 27mm C]25to 28mm Ans : C]25to 28mm 24.Other nameof executive bifocal …............. A] Flat top B] Cemental bifocal C] Solid bifocal Ans : C] Solid bifocal 25.Which lens have large distortion area with little reading area ……... A] Soft design PAL B] Hard design PAL C]Solid bifocal Ans : B] Hard design PAL 26. …......lens have been improved to reduce the distorted area and increasing the reading area REFRACTION DEPARTMENT-CBE

668 B] Hard design PAL C] Solid bifocal Ans : A] Soft design PAL A] Soft design PAL 27. Which type of frame has fitted in short corridor PAL lens ....... A] Smaller frame B] Larger frame C]Any type of frame Ans : A] Smaller frame 28. In ....... such tinted lenses are not suitable A] Higher powered B] Low powered C] Cylindrical powered Ans : A] Higher powered 29......absorbs all colors of the visible spectrum A] Neutral Grey B] Pink C] Green Ans : A] Neutral Grey 30. ..............tint lens will absorb most of UV and IR light A] Neutral Grey B] Pink C] Green Ans : C] Green 31......lens has absorb UV light A] Yellow B] Pink C] Green Ans :A] Yellow 32. …….....lens type zone of vision is restricted and the surrounding areas are distorted

669 A] Varifocal B] Tri focal lenses C] Bifocal lenses Ans :A] Varifocal 33. ........lenses have the ability to change their shade from light to dark and back again when exposed to different sunlight intensities A] Tinted lens B] Photochromatic lens C]Sun glass Ans : B] Photochromatic lens 34.Anti-reflective coating used to........... A]reduce glare B]Dispensing of optics C]sun glass Ans : A]reduce glare 35.Comfortable Pantoscopic slit is …....... A] 5-10* B]10-15* C]15-20* Ans : B]10-15* 36. ......... lens has two distance zone A] Vari focal B] Tri focal lenses C]Bifocal lenses Ans : C]Bifocal lenses 37.Reading segment is a small circle in …..... A] Vari focal B] Tri focal lenses C] Kryptok bifocal Ans : C] Kryptok bifocal 38. ......lens eliminate the peripheral distortion REFRACTION DEPARTMENT-CBE

670 A] Aspheric B] Lenticular C] High plus addition Ans : A] Aspheric 39.Vertex distance is the between the........ A]Back of cornea and front of lens B]Front of cornea and front of lens C]Center of cornea and front of lens Ans : B]Front of cornea and front of lens 40.IPD measurement the instrument used are …............... A] Pen torch B] Millimeter ruler C]A and B Ans : C]A and B 41.The height of the reading portion of a multifocal lens as measured from the deepest part of the eye wire to a reference point is called the …..... A] Segment height B] Frame height C] Pupillary distance Ans : A] Segment height 42.The following statements concerning progressive lenses are true except …....... A] These lenses are made without a line B] Are considered cosmetically superior to bifocals and trifocals C] These lenses have powers for viewing at only three distance Ans :C] These lenses have powers for viewing at only three distance 43.Marking lever is used to mark …...............

671 A] Orientation of prism power B]Mark axis the cylinder power C] Optic center of the lens Ans :C] Optic center of the lens 44.Power drum is used to …........ A] Determine the lens power B] Determine the axis C] Determine the lens size Ans : A] Determine the lens power 45.If the target is displaced upwards from the centre of the crosshair , ……... prism is present in the lens A] Base down B]Base up C]Base left Ans : B]Base up III. FILL IN THE BLANKS : 1. Semi-precious stone is one of the ……… Material Ans : Spectacle lens 2. Quartz is one of the ……media in making lens Ans : Natural media 3. What is index of crown glass…….. Ans : 1.523 4. What is the index of flint glass material…… Ans : 1.620 5. Flint glass materials were replaced by……Material REFRACTION DEPARTMENT-CBE

672 Ans : Barium crown 6. The high index glass is named as -------- Ans : Hi dex 7.Simple transposition are used to convert one form to another + to - ….. Ans : to reduce the central thickness of lens 8. High quality bifocal lenses are made from …..Materials Ans : Barium crown 9. Modern hard resin lens from …..Materials Ans :Allyldi glycol carbonate 10. ………gets scratches more easily &do not protect from the eye from UV rays unless properly tinted Ans : Plastic lenses 11. …….lenses get easily broken Ans : Glass 12. Plastic lenses are hardened by…or …… Ans : Chemical or Heat process 13.Trifocals have ….. Ans : Three distant zones 14. ------ lenses curved like a meniscus lens

673 Ans :Toric lens 15. -----is particularly designed to eliminate the peripheral distortion Ans : Aspheric 16.Who is the inventor of bifocal lens …........ Ans : Benjamin Franklin 17.Other name of kryptok bifocal......... Ans : Cemented bifocal 18.Other name of D-shaped bifocal............ Ans : Flat top 19.Kryptok bifocal height was................ Ans : 22mm to 24mm 20. ……....lens have reduced tendency of scratches Ans : Poly carbonate lens 21.The.......should not be placed more than 2mm below the lower eyelid. Ans : Reading segment 22. …........ will be if produced improper IPD measurement are made in spectacles Ans : Prismatic effect 23.Bifocals have ….. REFRACTION DEPARTMENT-CBE

674 Ans : Two distant zones 24.The material having highest refractive index is.... Ans : Diamond 25.Lenses having the ability to change their shape from light to dark and back are known as......... Ans : Photochromic lenses 26.A achromatic doublet reduces......... Ans : Chromatic Aberration 27.Most common defect in dispensing is the …....of lenses. 28............lens for distance & near vision Ans : Wrong centering 29.….........is designed at the bottom of the lens Ans : Bifocal 30. All bifocal wearer experiences a …........... Ans : Reading segment 31.............is used for making the bifocal segment Ans : Jumping effect Ans : Flint glass material 32.................lens is used for low vision&aphakic patient

675 Ans : Lenticular 33..............lens front surface gradually changes lens curvature from the center to periphery Ans : Aspheric 34.Algebric sum of …........... is a new sphere Ans :Sphere&cylinder 35.In D-shaped bifocal …...........is reduced Ans : jumping effect 36.…....... lens jumping effect is pronounced Ans : Executive bifocal 37. ………. has been the most popular tint for sun glasses Ans : Neutral gray 38.Executive lenses are very difficult for patient to adapt …... Ans : to another type of bifocals 39. ……..... lens are used for welding , high light & heat situation Ans : Green tint 40. ……....... lens also have physiological effect coolness Ans : Tinted lens 41.Progressive lens have the power increasing gradually from the ….. to … Ans : Distance zone to near zone 32.Vari focal lens is called ….. REFRACTION DEPARTMENT-CBE

676 Ans : Progressive additional lens 33.The tinted lens usually reduce the …...level in the high power lens Ans : Actual illumination 44. ........is darkens when exposed to UV light or blue end of the spectrum Ans : Silver halide 34. …...... gives a good cosmetic appearance Ans : Mirrored sun glass 46.When light passes through spectacle some light rays are reflected by front & back surface of the lens producing … Ans : Ghost image 47. ...... lens prevent ghost images and only one image is seen Ans : ARC 48.Tinted lenses are made of …. which is colored amber to red Ans : CR 39 49.A shattered …. lens does not have the sharp splinters typical for broken lens Ans : Hard Resin 50.Poly carbonate lens are the most ….... Ans : Impact resistant 51.Other name of the lenso meter ….

677 Ans : Foci meter 52. ...... is to measure the back or front vertex power of a spectacle lens Ans :Lensometer 53.The part of the spectacle that holds the lens is called …... Ans : Frame 54. …….... rest on the bridge of the nose and ears Ans : Frame 55. ……..... is the side of the spectacle Ans : Temple 56.It looks like a straight line without bend this is …... Ans : Convertible temple 57. …....... rest on the bridge of the nose and ears Ans : Frame 58 . ……..... is the distance between the center of the pupil Ans : IPD 59.How to measure the inter pupillary distance … 60. …….. ... is the width of the bridge of the nose Ans : Millimeters 61.Inter temporal distance is the distance between the ….... Ans : Bridge size REFRACTION DEPARTMENT-CBE

678 Ans : Temples 62.The lens having a small central area with the actual power and the periphery of the lens is Plano is called …..... Ans : carrier lens 63.Tinted lenses that filter out over …. of the blue & UV light are available Ans : 98 % 64.Pantoscopic tilt angle is … 65.What is base curve of meniscus lens .. Ans : 8-12 degree 66.Spectacle lens invented by ,..... Ans : -6.0ds 67.Types of spectacles lens …... Ans : Marco polo Ans : Mono focal, Multi focal, Tri fiocal, Varifiocal 68.Multifocal types are … Ans :Kryptok , Fused , Exceutive , Frankiln Split 69.Kryptok bifocal invented by … Ans : Benjamin Frankilin 70.The other name of kryptok bifocal is …...

679 Ans :Cemented bifocal mm 71.The available segment size in kryptok bifocal is …... 72. …...... other mane D shape bifocal Ans : 22 to 24 73.The Segment Available In DBF is …. Ans : Flat top bifocal 74.The Name Of The Executive Bifocal is …. Ans : 25,28,35 75.The nature source of spectacle materials is ….. 76.The refractive index of crown glass is …. Ans : Solid Bifocal 77.The index of the flint glass is …. Ans : Glass and plastic Ans : 1.523 Ans : 1.620 78. ….... is used for distant vision Ans : Barium crown glass 79.The index of high index glass is … Ans : 1.806 80.PMMA abbreviation is …. REFRACTION DEPARTMENT-CBE

680 Ans : Poly Methyl Metha Acrylate 81.CR 39 abbreviation is ….. Ans : Columbia resin 39th formula of thermo setting plastic 82.Types of frame are …. Ans : 6 83.Bifocals wearer experience a …...... 84. ……… is the material of stainless steel Ans : Jump effect 85.The type of temple are ....... Ans : Magnesium 86.The other name of the photo chromatic lens is ….. Ans : 6 Ans : Photo chromatic lens or photo tropic lens transitions 87.The other name of the single vision is ….. Ans : Mono focal 88.DBF is invented year in ….. Ans : 1884 89.PAL abbreviation is ….... Ans : Progressive additional lens 90. PAL lens invented by …...

681 Ans :Owenave 91.Types of tint are …... Ans : Solid Tint , Gradient pattern , Double Gradient pattern 92. ………. used for navy , Pilot patient Ans : Double gradient pattern 93.Write the form of simple transposition ….... Ans : +2.0ds / +1.0cyl x 45 = +3.0ds / -1.0x 135 94. …..…..is the normal vertex distance Ans : 12mm 95. ……..... is used for 3D picture and horizontal surface worker Ans : Polaroid glass 96. …….... material is inanti reflective coating Ans : Magnesium 97.Aphakic lenses available in ….model Ans : Lenticular Aspherical 98. …........is the special types of lens for myopia patient. Ans :Myodisc 99.The other name of the myodisc is …. Ans : Lenticular lens 100. ........is used for welding patient REFRACTION DEPARTMENT-CBE

682 Ans : Safety Lens 101.Toric transposition is used for ….. Ans : Meniscus and cylinder lens manufacture 102.Polaroid glass used for …. Ans : fisher man 103.The types of safety lens are….. Ans : ARC , Polaroid lens, UV & blocking glasses 104......glass is used for albinism patient Ans : UV & blocking 105.Name some Desirable qualities frame materials is.......... Ans : durability , light weight , flexible , maintain the original shape , fast color , inert to body fluids, inexpensive 106.The eye wire is the rim that …...... the lenses Ans : holds 107.Usually the front and temples are made of the ….. material Ans : same 108. …...... is most comfortable for those people who wear their eye glass for long period time. Ans : Skull temple 109.Hinge is usually made of …..

683 Ans : Metal 110.The other name lenso meter ….. Ans :Focimeter, Vertometer 111.The two types of transposition is ….. Ans : Simple &toric transposition 112.In lensometer the power of the lens is measured by placing the …. Ans : lens stop 113.Types of corrective lenses are ….. Ans : single vision , bifocals, trifocals, progressive addition lenses 114.UV & blue made of CR39 ,....... Ans : Plastic 115.UV & blue provide comfort from ….. reduce haziness and create sharper vision Ans : Glare 116.Risk & damage to the eye while working in industries is minimized by ..... Ans : safety glass 117.The other name of the high – index is …... Ans :Hidex 118.Executive bifocal advised in ,.... patient Ans : weaver 119. …...... is the natural material used for glass making REFRACTION DEPARTMENT-CBE

684 Ans : Quartz 120.Concave lens invented by …. Ans : Pope Leo x 121. …… …. are the types of PAL Ans : Hard , soft, short corridor 122. In pal , the addition power situated in …. Ans : temporal side 123. …….... nose bridge is advised for surgery done by sinus problems Ans : Keyhole 124. ……..... is used in unfit bridge Ans : Tiny skew 125.The other name of the comfort cable temple is … Ans : Metal coil temple 126.Tortoise frame is manufactured with … Ans : Tortoise shell 127. ……… are the types of frame Ans : Tortoise frame , full frame , combination frame , half eye frame , semi rimless , full rimless frame 128.Grey lenses can be recommended for protection from …..

685 Ans : Intense light or glare 129.Polycarbonate invented year .... Ans : 1970 130. .......... is a material of the soft nose pad Ans : Silicon 131.Hard nose pads material is ….. Ans : Acetone 132. Types of temples …. Ans : Skull, Library , Convertible , Comfort, Cable,Reading Bow 133.The types of bridges for plastic frame are….. Ans : Saddle, Modified Saddle , Keyhole , Adjustable Nose Pad 134.........are the types of metal frame Ans : Adjustable Nose Pad , Unit Fit Bridge , Saddle Bridge 135....... is the angle between the normal to the temple and frame front Ans :Pantoscopic tilt 136. The … is the distance between the of the cornea and back of the lens Ans : vertex distance 137.Reading bow temple or comfort cable temple is used for ….... REFRACTION DEPARTMENT-CBE

686 Ans : children and sports man 138.In bifocal lens, the distant lens materials is …, the near vision lens is ….. Ans : Crown glass , Flint materials 139.The ….. card is must in pal marking Ans : lay out 140. …...... is the type of safety glass Ans : Anti Reflecting Coating Polaroid glass , UV & blocking lens 141.The special lens design is …... for high myopia Ans : Corrective curve lenses , Aspheric lenses , Aphakic lenses 142. …. …... available in lenticular model Ans : The Aphakic Lenses 143. … ...... used in anisometropic patient to minimize vertical prismatic imbalance . Ans : slab off prism 144. …….... lens advised for welding work patient 145. ……..... is used for skating patient Ans : safety 146.ARC abbreviation …..... Ans : Impact Resistant Glass

687 Ans : Anti Reflection Coating 147.SRC abbreviation ….... Ans : Scratch Resistant Coating 148.The type of adjustable nose is …... Ans : Silicone , Acetone 149.High index is used for making …. Ans : High refractive power 150. …....... is particularly designed to eliminate the peripheral distortion. Ans : Aspheric lens 151.Tinted lenses are not suitable for ….... Ans : High powered lenses 152.........the intermediate power situated in upper portion of the lens Ans : In vocational trifocal 153.Polyamide frame is made using …..... method Ans : injection moulded 154.Semi rimless has an upper segment made of either plastic or metal and lower segment made of ….. Ans : nylon card 155.Patient having refractive error more than …. should not be advised semi rimless or full rimless frame REFRACTION DEPARTMENT-CBE

688 Ans : +-3.0d 156. …....... is made up of temple and nose bridge joined together by using screws Ans : Full rimless 157. ……..... entire glass made up of same color Ans : Solid pattern 158.The tint should not be done in ….. glass Ans : old 159.Spectacle lenses are made from ….. Ans : Natural resources , glass and plastic materials 160.The index of crown glass is …. Ans : 1.523 161.The index of flint glass is …. Ans : 1.620 162.Three types of pal lenses are ….. Ans : Hard, Soft, Short Corridor 163.Progressive lenses advised to …. Ans : Computer Workers , Teachers, Engineers 164. Plastic lenses are made from ….. Ans : Poly methyl metha acrylate

689 165.A corrected lens is a form to ….. Ans : avoid and minimize the distortions through the edge of the lens 166.Meniscus lens form usually ground on ….. Base curve Ans : 6.0D IV. TRUE OR FALSE : 1. Spectacle lens are made from plastic material only Ans :False 2. Spectacle lens are made from plastic or a high quality glass material Ans :True 3. The crown glass used for making double vision ophthalmic lens Ans : False 4. Flint glass material is 1.620 indexes Ans :True 5. Plastic lenses are generally made from one only material Ans :False 6. Plastic lenses are about half the weight of glass Ans :True 7. The uncorrected is a form to avoid or minimize the distortion through the edge of lens Ans :False REFRACTION DEPARTMENT-CBE

690 8. 5types of principle eyeglass lenses are manufactured to correct vision 9. Single vision correction for both near &distance Ans : False 10. Different lens forms have different benefits Ans :False Ans :True V. MATCH THE FOLLOWING : 1. Natural Resource - Quartz 2. Semi-precious - Ruby 3. Spectacle lens - Source of materials 4. Crown glass - Single vision 5. Flint glass - Bifocal 6. Bifocal lenses - Barium-crown glass 7. Soft contact lens - HEMA 8. Semi soft lens - CAB 9. Hard contact lens - PMMA 10. Diameter - HVID 11. Contact lens - 1508 12. Semi soft lens - Gas permeable

691 13. Hard contact lens - Non gas permeable VI.JUMPING WORD : - Dispensing - Prescription 1. -I- - En- -Ng - Plastic 2. Pr- - - R –P- - -N - Meniscus 3. .- - - - Tic - Manufacture 4. - E- -S- - S - Flat 5. - A –U- - - Tu- - - Lenticular 6. - - - T - Aspheric 7. L - -T-Cu - -R - Transposition 8. As-He - - - - Algebric 9. –R - -S-O- -T - -N - Sphere 10. - L - - C - Cylinder 11. S – H – R- - Executive Bifocal 12. C –Li - - - R - Progressive 13. E - -C - - -E- I - -C - - - Photo Chromic 14. P – O - - - -Ive - Lens 15. - Ho - -Ch - -M - - - Sunglasses 16. - - -S - Antireflection 17. S- - G- A - - 18. - - Ti – E –L –C - - - - REFRACTION DEPARTMENT-CBE

692 19. - -O - - - Ghost 20. U - - - - V - -Let - Ultraviolet 21. - - -Er - - D - Amber Red 22. R – Ti - -T - -P - -Me – T - - - Retinitis Pimentosa 23. –O –Y – A –P – N - - - - Poly Carbonate 24. - -Y - -C - - - Physical 25. E – E - - -E - Eye Wire 26. - -M – L - - Temple 27. – Nd - -E – E - End Piece 28. S- Ec - -C - - - Spectacle 29. – K - - - - Skull 30. –Ib - -R - - Library 31. - - D - - - - Riding 32. - - - G - - Hinge 33. C - - V –R –I - -E - Convertible 34. – I - -T - -I - - T - Light Weight 35. – L - -I – L - - Flexible 36. A- J - -T - - -T - Adjustment 37. - - B – E - - W - Cable Bow 38. – U - -B – L - Ty - Durability 39. – A - - C - L – R - Fast Color

693 40. – Nt - - P – P - - -A - - - Inter Papillary 41. M - -S - - - M - -T - Measurement 42. - -N – C –L - - - Monocular 43. D - - -A - - - - - Distance 44. - - I - -E - Bridge 45. P – T – E – T - Patient 46. M - - - - M - - E - - Millimeter 47. - E - - E –T - -N - Reflection 48. O – S - - - E - Observe 49. - - -E - Face 50. I – T - -T –M –O - -L - Intro Temporal 51. - A –T – S - -P - - - Pantoscopic 52 V - - T - - D - - T - -N - Vertex Distance 53. - E –M - - T - - I - -T - Segment Height 54. – E – S - - -Ec - - V -T - - Lens Affectivity 55. D - -T – M - - E - - Distometer 56. - - - G –M - - T - Alignment 57. - - - R - - Nt - - T - -N - Poor Centration 58. –R - - E - - -E - Frame Size 59. – N - -N - -D - -I – M - Unwanted Prism 60. - - - - S - - - I - - G - Counseling REFRACTION DEPARTMENT-CBE

694 - Delivery - Trouble Shooting 61. - - Li - - -Y - Refraction 62. - - - U - - - Sh - - T - - - - Error 63. – E - -A – T - -N - Optical Shop 64. – R - - - - Instrument 65. – P - - C - - S - - P 66. I –S - - U - - - - VII.ENGLISH TO TAMIL : - அளைடீ ு - தூரம் 1. Measurement - முகம்அளைடீ ு 2. Distance - கண்ணாடிபாலம் 3. Face measurement - உள்தற்காலிகதூரம் 4. Glass bridge - ககாயில்நீளம் 5. Intro temporal distance - சைர்சைக்ஸ்தூரம் 6. Temple length - மூக்கு திண்டு 7. Vertex distance - பான்கைாஸ்ககாபிக் சாய்வு 8. Nose pad - பிரிவு உயரம் 9. Pantoscopic tilt - முகம் அளைடீ ு 10. Segment height 11. Face measurement

12. Adjustable 695 13. Optical dispensing 14. Rock crystal - அனுசரிப்பு 15. Contrast sensitivity - ஆப்டிகல் ைிநிகயாகம் 16. Dark adaptation - ராக் படிக 17. Trouble shooting - மாறுபட்ை உணர்திறன் 18. Vocational trifocals - இருண்ை தழுைல் 19. Sweat - பழுது நீக்கும் 20. Inert - சதாழில் முக்ககாணம் 21. High index - ைியர்வை 22. Peripheral aberration - மந்தம் 23. Focal length - உயர் குறியீட்டு 24. Formula - புற மாறுபாடு 25. Eye wire - குைியத்தூரம் 26. Segment top - ஃபார்முலா 27. Optical axis - கண்கம்பி 28. Principle focus - பிரிவு கமல் 29. Glare - ஒளியியல் அச்சு 30. Saddle - சகாள்வக கைைம் 31. Joins - கண்வண கூசும் 32. Jump effect - கசணம் - கசர் - தாைி ைிவளவு REFRACTION DEPARTMENT-CBE

696 - சைள்ளி வைவலடு - கபய் பைம் 33. Silver halide - மூடுபைி நிவல 34. Ghost image - முற்கபாக்காை கூட்ைல் சலன்ஸ் 35. Foggy condition - பிரதிபலித்த சூரியக் கண்ணாடி 36. Progressive addition lens - இறுதிதுண்டு 37. Mirrored sun glass - ககாளஉருவள 38. End piece - கண்கண்ணாடிகள் 39. Sphero cylindrical - இயற்வகஊைகங்கள் 40. Eye glasses - அவரைிவலமதிப்பற்றகற்கள் 41. Nature media - பிறழ்வு 42. Semi precious stones - ைிலகல் 43. Aberration - சபாருள் 44. Distortion - சட்ைகம் 45. Material - சலன்ஸ் 46. Frame - கண்கைர் 47. Lens - கிரீைம்கண்ணாடி 48. Spectacle - பிளின்ட்கண்ணாடி 49. Crown glass - ைிளிம்பு 50. Flint glass - லக்ஸ் 51. Rim - ஒவ்ைாவமஇல்லாதது 52. Lugs 53. Non allergic

54. Metal 697 55. Steel wire 56. Scratch - உகலாகம் 57. Molecules - இரும்புகம்பி 58. Vertex distance - கீறல் 59. Aspheric lens - மூலக்கூறுகள் 60. Lenticular lens - சைர்சைக்ஸ்தூரம் 61. Flat - ஆஸ்சபரிக்சலன்ஸ் 62. Perpenticular - சலண்டிகுலர்சலன்ஸ் 63. Cent ration point - தட்வையாை 64. Ultraviolet - சசங்குத்தாை 65. Tinted lens - வமயபுள்ளி 66. Photochromic lens - புறஊதா 67. Anti reflection coating - நிறசலன்ஸ் 68. Pantoscopic tilt - புவகப்பைகுகராமிக்சலன்ஸ் 69. Surfacing - எதிர்ப்புபிரதிபலிப்புபூச்சு 70. Marking - பான்கைாஸ்ககாபிக்சாய் 71. Smoothing - கமற்பரப்பு 72. Bifocal - குறித்தல் 73. Transposition - சமன்வமயாைது 74. Decent ration - இருைவகப்பார்வைமூக்குக்கண்ணாடி - மாற்றம் - சதளியவைத்துஇறுத்தல் REFRACTION DEPARTMENT-CBE

698 - பிரிஸ்மாடிக்ைிவளவு - சமருகூட்ைல் 75. Prismatic effect - குத்துச்சண்வைஅவமப்பு 76. Glazing - தரவுஅவமப்பு 77. Boxing system 78. Datum system VIII.CORRECT THE SENTENCE : 1. Spectacle lenses are made from plastic or a less quality glass material. Ans :High quality glass materials 2. Flint Glass material is index of 1.806. Ans :1.620 3. Glass lensesare about half the weight of glass. Ans :Plastic lenses 4. Five types of principle Eye glasses are manufactured to correct vision. Ans :Two types of principle 5. Single vision lenses correct for both near & distance. Ans :Bifocal lenses 6. Different lens forms have samebenefits. Ans :Different lens forms have Different benefits. 7. Progressive lens causes the jumping effect. Ans :Bifocal lenses

699 8. Spectacle lenses are made from metal and plastic materials only. Ans :Glass and plastic materials 9. In high power lens tinted lens are suitable. Ans :Are not suitable 10. Convertible templehugs the ear & is more difficult to remove. Ans :Cable bow / Riding temple 11. Toric transposition is used for Spherical lens only. Ans :Cylindrical lens 12. DBF lens is used for nearonly. Ans : both distance & near 13.Lenticular lens is particularly designed to eliminate the peripheral distortion. Ans :Aspheric lens 14. High power index lenses with reduced thickness and weight makes than difficult to fit. Ans :Easier to fit 15. The crown glass used for making double vision ophthalmic lens. Ans :Single vision 16. The flint glass used for making single vision ophthalmic lens. Ans :Bifocal lens REFRACTION DEPARTMENT-CBE

700 17. Inert to body fluid will cause allergy Ans :Not cause any allergy 18. Back vertex distance is measured using an optical ruler. Ans :Distometer 19. High index is used for making low refractive power lenses. Ans :High refractive power 20. Aspheric lens is particularly designed to eliminate the central distortion. Ans :Peripheral distortion 21. The different segment size is available in Executive bifocal. Ans :Kryptok bifocal 22. Distance between the temple top of the ear is Pantoscopic distance. Ans :Temp length 23. Introtemporal distance is the distance between form of corner and back of lens. Ans : vertex distance IX.ONE MARK QUESTIONS : 1. Why we do the simple transposition? 2. Smaller frame fitted in short corridor PAL why? 3. Which color tint used for foggy condition?