Vision Library
Age Related Macular Degeneration
Macular degeneration is fairly common among the elderly. The macula is the portion of the retina responsible for clear, sharp, central vision. Occasionally, the waste products of some of the cells in the macula are not removed as they normally are. Instead, they just clump together, so that when you look directly at an object, […]
Read More....Color Vision Explained
The sky is blue, the grass is green, the sun a burning yellow, but why? We know that white light is really a composite of the colors orange, yellow, green, blue, indigo and violet. The retina, which receives the light, contains three types of color sensors called red, green and blue cones. The red cones […]
Read More....High Risk for Eye Cancer
The National Cancer Institute states that exposure to strong sunlight, particularly in early childhood, may increase the risk of intraocular malignant melanoma (eye cancer). This disease affects about 2,000 people each year and can be fatal if left untreated. Being born in the south, having blue eyes, indulging in sun bathing and not wearing sunglasses […]
Read More....Night Blindness
Many people have more difficulty seeing clearly at night than they should. This condition is called Nyctalopia in which the retina does not regenerate a pigment called visual purple. This purplish-red pigment prevents night blindness but can become bleached out when the eyes are exposed to strong sunlight or if the retina is deficient in […]
Read More....The Dry Eye
The normal eye is kept moist by a thin film of tears on its surface. Most of these tears are produced by glands under the upper lid and are spread across the cornea with each blink. If tear production is reduced for any of a variety of reasons, you will suffer symptoms of hot, burning, […]
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