1. Eye Disease Simulations Lien Bui Period 2

2. Normal Vision Normal vision is also known as “20/20” meaning that a person can see details from 20 feet away. During an eye test, the doctor examines your eye using a Snellen eye chart, but in general they show 11 rows of capital letters. Letters gradually get smaller as you go down the row.

3. Age related Macular Degeneration “A common eye condition and a leading cause of vision loss among people age 50 and older. It causes damage to the macula, a small spot near the center of the retina and the part of the eye needed for sharp, central vision, which lets us see objects that are straight ahead.” This is a picture representing AMD.

4. Cataract Cataract is the clouding of the eye which can lead to impaired vision. Cataracts occur when there is a buildup of protein in the lens that makes it cloudy. This prevents light from passing clearly through the lens, causing some loss of vision.

5. Diabetic Retinopathy Diabetic Retinopathy refers to a group of eye problems that people with diabetes may face. It is caused by the blood vessels in the retina. A healthy retina is necessary for good vision. How this happens is when abnormal blood vessels can develop and leak blood into the center of the eye, blurring vision.

6. Glaucoma “Glaucoma is a group of diseases that damage the eye’s optic nerve and can result in vision loss and blindness. However, with early detection and treatment, you can often protect your eyes against serious vision loss.” When the optic nerve is damaged from increased pressure, open-angle glaucoma- and vision loss—may result. That’s why controlling pressure inside the eye is important.

7. Myopia (Near Sightedness) Causes: eye fatigue from computer use and other extended near vision tasks, coupled with a genetic predisposition for myopia. Myopia occurs when the eyeball is too long, relative to the focusing power of the cornea and lens of the eye. This causes light rays to focus at a point in front of the retina, rather than directly on its surface

8. Retinitis Pigmentosa Retinitis pigmentosa (RP) refers to a group of inherited disorders that slowly lead to blindness due to abnormalities of the photoreceptors (primarily the rods) in the retina. Normalities of the rods (photoreceptors) in the retina. Retinitis Pigmentosa has rods degenerate. This causes difficulty in seeing dim light, tunnel vision, and loss to see color.

9. Sources https://www.nei.nih.gov/health/maculardegen/armd_facts https://www.nei.nih.gov/health/glaucoma/glaucoma_facts http://www.allaboutvision.com/conditions/myopia.htm http://medical-dictionary.thefreedictionary.com/retinitis+pigmentosa