SSE Medical Kit - Shining Eyes

SSIO International Medical Conference SSE Kit Shining Eyes - Adwaith R, Group 2, USA

“The eyes should be used for seeing only what is pure, what is holy and what is edifying.” http://sssbpt.info/ssspeaks/volume30/sss30.pdf

Sharp Eyes-How Does A Camera Work? Do you know how a camera works ? The light rays from an object passes through the lens and gets recorded in a film or computer chip. Did you notice anything peculiar in this figure? Well, you are right! The image is upside down! However, when the picture is uploaded to a computer or printed, the image will no longer be upside down.

Sharp Eyes-How Do Your Eyes Work? The light from the object pass through the lens of your eyes and gets recorded in the back of your eye(also known as the retina). Similar to a camera the object our eye records is also upside down. The image is sent to the brain and the brain turns the image rightside up. It tells you what you are looking at. Watch this short and interesting video on “How the eye works ?” https://www.youtube.com/watch?v=i3_n3Ibfn1c

Model a Retinal Image The brain does a very tough job ! It has to work all the time and the eyes makes things difficult for the brain. The lens of the eyes are convex in nature and turns the image it sees upside down on the retina. To model what a convex lens does to an image, try this out !! Materials Needed: Magnifying glass White wall or white paper taped against a wall Procedure: 1. Find a white wall or tape the white paper to the wall that faces a window 2. Hold the magnifying glass close (3 inches) to the white wall or paper 3. You should see the inverted image of whatever is outside the window. That’s how the image will be projected onto your retina.

Parts of the EYE Choroid The Choroid acts like a light-absorbing layer Ciliary Body The ciliary body is the part of the eye that connects the choroid to the Iris. Cornea Cornea is a clear window at the front of the eye that covers the iris and the pupil. Iris The iris regulates the amount of light that enters the eye. It surrounds the pupil.

Parts of the EYE (Cont..) Pupil Hole in the center of the eye where light passes through. Sclera The white part of the eye that protects the eyeball. Lens Located behind the pupil and acts like a camera lens by focussing light onto the retina at the back of the eye. Macula Is the yellow spot on the retina at the back of the eye where vision is Keenest in the retina.

Parts of the EYE (Cont..) Retina The retina is a light-sensitive inner lining at the back of the eye. Ten different layers of cells work together in the retina to detect light and turn it into electrical impulses.The retina works much in the same way as film in a camera. Optic Disk Is the visible portion of the optic nerve also found on the retina of the eye. The optic disk identifies the start of the optic nerve where messages from cone and rod cells leave the eye via nerve fibres to the optic centre of the brain. This area is also known as the 'blind spot'.

Label and Color the EYE

Your Eyes Natural Defenses Your eyes are very delicate and that’s why your body has built-in ways to protect them. Eyebrows shield your eyes from bright light Eyelashes help catch dust and debris before they Eyelids close to keep harsh light enter the eyes and harmful objects out. Your eyes lie in bony sockets that protect them Tears keeps the eyes moist. from getting hit It also washes away things that can irritate your eyes

Vision Problems A problem with any part of the eye causes vision problems. Some of the problems are: The lens does not focus correctly, or the shape of the eyeball isn’t round and as a result the image will appear blurry. These problems are usually taken care of with prescription glasses or contact lenses. Let us look at some of the common vision problems in detail: Farsightedness - It is also known as “Hyperopia”. This is caused when the image is focused behind the retina. Nearsightedness - It is also known as “Myopia”. This is caused when the image is focused in front of the retina.

Vision Problems (Cont..) Cataract - Cloudiness in the lens, usually due to aging. Glaucoma - Increased eye pressure is known as glaucoma.

Healthy Vision Tips Use these tips to care for your vision. - Eat healthy and well balanced foods such as greens, fruits, and vegetables. - Exercise regularly to maintain body weight. - Wear your glasses if a doctor prescribed one.

Healthy Vision Tips(Cont..) - Always wash your hands before touching your eyes to keep the germs away! - When playing sports, wear the right protection to keep your eyes safe. - Wear your sunglasses to protect your eyes from harmful rays from the sun such as UVA and UVB. Also remember never to look directly at the sun!

Healthy Vision Tips(Cont..) - Give your eyes a break! Follow the 20-20-20 rule - every 20 minutes, look about 20 feet away for 20 seconds. - Say “NO” to smoking! Smoking leads to blindness! - Talk about eye health with your family and keep your whole family safe!

Optical Illusions What is an optical illusion? Optical illusions use colors, light, and patterns to make images that are misleading to our brains! The information taken by the eye is processed by the brain, which creates a perception that in reality, does not match the true image. Optical illusions occur because our brain is trying to interpret what we see and make sense of the world around us. Optical illusions simply trick our brains into seeing things which may or may not be true! Let’s look at some interesting optical illusions.

Optical Illusions (Cont..) Is the train moving forward or backward?

Fun Activities For your Eyes

Spot The Differences! They look the same, but they aren’t! Compare both pictures to see who is protecting their eyes better! Good luck!

Search With All Your Eyes!

Eye Working Word Scramble

Eye-Quations Directions: Solve the following equations that contains the word “eye”. 1. + = __________ 4. + = ___________ 2. + = __________ 5. + = ____________ 3. + = __________ 6. + = ____________

Eye Motions Directions: Our eyes can communicate even if we don’t say a word! Try to match the emotions with the correct picture. Angry Sad Glad Surprise Tired

Fact OR Myth Directions: Tell whether each statement given below is a fact or a myth. 1. Reading in dim light is harmful to your eyes. 2. Never sit too close to the TV. 3. If you need eyeglasses, your eyes are not healthy. 4. Eyes do not wear out. You can use them as much as you want. 5. If you eat carrots, you will have good eyesight. 6. Eye problems can affect people of all ages.

Answer Key to Myth or Fact 1. Myth - Although reading in dim light makes your eyes feel tired, it is not harmful. 2. Myth - There is no scientific evidence that sitting too close to the TV is bad for your eyes. 3. Myth - Wearing eyeglasses has nothing to do with eye health, but rather with normal changes in parts of your eyes. 4. Fact 5. Myth - The vitamin A in carrots helps eyes function well, but it is just one important factor for good eyesight. 6. Fact

Jai Sai Ram You Look to me, I look to You!!! Vision of Love