Originally published November 2007 People with macular degeneration gradually lose their color perception. This is because the photoreceptor cone cells, which are most dense in the macula, are responsible for color vision. The rod cells, which proliferate in the peripheral field, provide only black and shades of gray. Color is interpreted by the brain. The [Read More]
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Degenerative Myopia
by Dan Roberts (Updated November 2015) Overview Myopia is a condition whereby images come into focus in front of the eye, resulting in a blurred image on the retina. The more severe the nearsightedness, the farther the image is from the retina, which results in more blurry vision in the distance. Myopia causes light rays [Read More]
Low Vision Rehabilitation Delivery Model Launched
Kansas City, MO (August 10, 2007) — An historic event in low vision care was officially announced on August 10, 2007 at the third annual Envision 07 Conference in Kansas City, Missouri. As part of the keynote speech, R. Tracy Williams, O.D. described a model that has been developed over the past five months by [Read More]
Genetics and Age-Related Macular Degeneration
Information for this article provided by Asper Ophthalmics What is DNA? DNA (deoxyribonucleic acid) is a molecule that contains all of the genetic instructions needed to develop and maintain an organism. It is a long structure resembling a winding staircase. Each step of the staircase consists of two building blocks called nucleotides. There are four [Read More]
C3 Gene Variant Increases Risk of AMD
Press ReleaseJuly 18, 2007Researchers have found a gene variant that can more than double the risk of age-related macular degeneration (AMD).The researchers based their findings on studies of patients with AMD (603 from England and 244 from Scotland) who were compared with 701 unaffected people. They found that a variant in the complement C3 gene [Read More]