| Age related
macular degeneration (AMD) is one of the most common causes of
poor vision after age 60. Although the specific cause is unknown,
AMD seems to be part of aging. While age is the most significant
risk factor for developing AMD, heredity, blue eyes, high blood
pressure, cardiovascular disease, and smoking have also been identified
as risk factors. AMD
accounts for 90 percent of new legal blindness in the US. Nine
out of 10 people who have AMD have the dry form, which results
in thinning of the macula, the area of the retina responsible
for central vision. Dry AMD takes many years to develop. Currently
there is no treatment.
The wet form of AMD occurs much less frequently (one out of 10
people) but is more serious.
Laser surgery is the only proven effective treatment, to date,
for wet AMD. The procedure usually does not improve vision but
prevents further loss of vision.
The visual symptoms of AMD involve loss of central vision. While
peripheral vision is unaffected, one loses the sharp, straight-ahead
vision necessary for driving, reading, recognizing faces, and
generally looking at detail. Imagine being able to see a clock
on the wall but unable to make out the time or unable to read
because you could not see parts of words on the page.
Promising AMD research is being done on many fronts. In the meantime,
high-intensity reading lamps, magnifiers and other low-vision
aids help people with AMD make the most of remaining vision. |