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Dark Adaptation -Adapting from Bright Light to Dim Light
July 20, 2023

Dark Adaptation -Adapting from Bright Light to Dim Light

Some of the common symptoms associated with age-related macular degeneration are colors are not as vivid, vision isn't as sharp, AND it takes longer for one's vision to adjust when going from a brightly lit situation to a dimly lit one.

Science has known that one of the early signs associated with macular degeneration is the slow response of adapting from bright light to darkness..

"How our eyes adapt to darkness can be a key indicator of retinal health, which can be altered in the presence of certain diseases, such as age-related macular degeneration (AMD)," report the authors of Dark Adaptation and Its Role in Age-Related Macular Degeneration (J Clin Med 2022 Mar 1)

This early warning symptom of dark adaptation or loss of night vision shows up long before other tests can show that one has AMD. That's because the cells that are responsible for night vision are affected sooner and more severely than cells that are responsible for daytime vision.

But how to evaluate and measure this in patients has not been possible until recently. Gregory Jackson, Ph.D., the co-founder and past Chief Scientific Officer of MacuLogix discusses a test that has been in clinical studies for the early detection of macular degeneration.

Changes in the ability to adapt to darkness can be observed and measured before structural changes to the retina can be seen as was demonstrated by the ALSTAR study. This clinical trial showed that delayed dark adaptation indicated age-related-macular-degeneration at least 3 years before this retinal disease could be diagnosed clinically.

Find out more about testing for dark adaption, how to get this test, and who should be tested ...

Macular Degeneration and Dark Adaptation

Leslie Degner, RN, BSN

Better Health for Better Vision

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