Macular degeneration
Macular Degeneration is a medical condition where the light sensing cells in the macula malfunction and over time cease to work. It is the main cause of blindness today for those over the age of sixty five. There are two basic types of the disease: Standard Macular Degeneration (MD) and Age Related Macular Degeneration (ARMD). The main cause of macular degeneration is old age and thus age related macular degeneration is the most common form of the condition. However macular degeneration that is not age related is most commonly caused by disease or a heredity illness or condition. These forms are sometimes called Juvenile macular degeneration. In macular degeneration the final form results in complete blindness in the central part of the patient's vision.
Types of Degeneration
Eighty five to ninety percent of all macular degeneration is categorized as "dry" macular degeneration where fatty tissue will slowly build up behind the retina. Ten to fifteen percent of cases are not, however, resulting from the build up of fatty tissue; these cases are called "wet" macular degeneration due to the leakage of blood and other fluid from behind the retina into the eye. If wet macular degeneration continues without treatment it will completely destroy the macula.
Typical Symptoms
- A grid of straight lines appears wavy and parts of the grid appear blank.
- Visual acuity drastically decreasing (two levels or more) ex: 20/20 to 20/80.
- Holes visible in fundus photographs.
- Trouble discerning colors; specifically dark ones from dark ones and light ones from light ones.