The Function of the Normal Macula | BrightFocus Foundation
2015年7月1日 · The macula is located near the center of the retina; its function is to process harp, clear, straight-ahead vision. The retina is the paper-thin tissue that lines the back of the eye and contains the photoreceptor (light sensing) cells (rods and cones) that send visual signals to …
How Long Does it Take to Go Blind from Glaucoma?
2021年7月7日 · It is beyond the scope of this article to discuss every form of glaucoma and its potential relationship with the rate of vision loss, but one other “type” of glaucoma is important to mention: normal-tension glaucoma (or normal-pressure glaucoma). This form of glaucoma sometimes results in field of vision loss close to the central vision ...
Glaucoma and Eye Pressure - BrightFocus
Patients who have normal-tension glaucoma are thought to have more susceptible optic nerves, such that even at normal eye pressures the optic nerve slowly degenerates. Moreover, even though the eye pressure is “normal,” the treatment is the same: lowering the eye pressure through medications, laser, or surgery.
How Glaucoma May Affect Vision | BrightFocus Foundation
This is an example of normal vision. This is also an example of how someone sees during the beginning stages of open-angle glaucoma. Because there are no symptoms initially, regular eye examinations are very important.
View How Macular Degeneration May Affect Vision - BrightFocus
2021年11月3日 · In the very late stage of dry macular degeneration, or geographic atrophy, macula cells begin to die, and large portions of the center of vision may become blurred. People at this stage may have blind spots as well as some areas that appear wavy or distorted.
Understanding Glaucoma | BrightFocus Foundation
Normal vision vs. vision with glaucoma. Intraocular pressure, the fluid pressure inside the eye, is maintained at normal levels when some of the circulating aqueous humor (fluid produced by the eye) can leave the eye through its built-in drainage pathway.
Specialty Glasses for Macular Degeneration - BrightFocus
2021年7月14日 · Optometrists specializing in “low vision” can be especially helpful in finding the best possible glasses, including those with nearly normal vision. Yellow Tinted Glasses Those with early AMD, that have drusen, little white spots in the retina detected by an ophthalmologist, will sometimes have trouble adjusting to a dark room when coming ...
What is considered normal eye pressure? - BrightFocus
2014年11月4日 · While the average eye pressure is approximately 15 mm Hg (millimeters of mercury), the range of normal eye pressure is much larger. About 90 percent of people will fall between a pressure of 10 and 21.
Injections for Wet Macular Degeneration: What to Expect
Ten years ago, before injections for wet macular degeneration became available, most people lost much of their central vision. Now, thanks to medical research, injections with brolucizumab (Beovu®), aflibercept (Eylea®), ranibizumab (Lucentis®), or bevacizumab (Avastin®) can protect precious reading and driving vision in many patients.
Glaucoma: Understanding the Visual Field Test - BrightFocus
2021年7月14日 · Often, it is difficult to recognize that peripheral vision is changing during normal daily activities because the deficits can be subtle and one eye can compensate for the other. One of the key tests that your eye doctor will perform as part of the diagnosis for glaucoma is the visual field test, which is repeated periodically to determine if ...