How long does it take for severe damage to last if you have macular degeneration?

Any time. Macular degeneration is a "spectrum" disease: it can be very mild for a very long time, or can become severe rather quickly. Once damage sets in, it tends to progress. The "dry" form is slower to progress but has no good treatments available. The "wet" form is more devastating but there are some good therapies that can control it if caught early.
Very variable. Macular degeneration can come rapidly within days or it can take years to affect vision. There is a dry macular degeneration that takes years to affect vision but is more common. The more infrequent condition is wet macular degeneration that cause vision damage literally overnight and needs immediate attention.

Related Questions

How long is it supposed to it take for severe damage to be done with macular degeneration?

Varies. Macular degeneration is variable from case to case. Prediction of the course of the damage is not easily done and is likely to be wrong. Just make sure you are seeing a retinal specialist in ophthalmology who can monitor this and give you treatment when needed. Read more...
Usually years. Depends if it is the dry type or wet type - wet type is more aggressive and patients can have submacular hemorrhage with sudden loss of vision; but usually amd takes many years to affect the vision; also depends on if the retinal atrophy is outside of the fovea (center of macula), so vision can be quite good for long time. Read more...

How long does it take for permanent damage to be done with macular degeneration?

Varies. Each individual patient can progress at different rates. See your retina specialist. The appropriate use of areds vitamins can lessen your risk. Also, stop smoking if you smoke since that worsens the disease. Read more...
Varies. Dry macular degeneration can take months to years to cause permanent damage while wet macular degeneration can reach the point of irreversible damage in days to weeks. This is what makes the wet form so much more threatening to the vision. Read more...

How long should age-related macular degeneration last?

Forever. Once you have it, it does not go away. The rate of progression varies from person to person. Use areds vitmains as dicated by your retina specialist. Use frequent amsler grid testing at home. If you smoke, then quit. Read more...
Life predispositon. The predisposition to amd lasts a lifetime, since it is a genetic-based issue. Read more...
Chronic Disease. Age-related macular degeneration is a chronic disease of the central part of the retina. It is broken down into two types, the dry; form, which involves slow, patchy deterioration of retinal cells, and the wet; form which is caused by bleeding and leads to rapid vision loss. Current treatment for the wet form; is injections with eylea, lucentis, (ranibizumab) or avastin. For the dry form, areds vitamins. Read more...