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Medical Forum / General / Vision / December 2006can lead poisoning cause night blindness?
I know lead poisoning causes neurological damage of various kinds. Can it cause night blindness, or is that purely a problem in the retina? >I know lead poisoning causes neurological damage of various kinds. > Can it cause night blindness, or is that purely a problem in the > retina? Lead poisoning can cause optic neuritis and optic nerve atrophy. That might show up as "night blindness" but the vast majority of "night blindness" comes from simple refractive error, made evident by large pupils and diminished depth-of-field. -MT I think you would be surprised at the number of people who have CSNB (Congenital Stationary Night Blindness). >>I know lead poisoning causes neurological damage of various kinds. >> Can it cause night blindness, or is that purely a problem in the [quoted text clipped - 6 lines] > > -MT >I think you would be surprised at the number of people who have CSNB >(Congenital Stationary Night Blindness). That was an interesting google, but from a clinical point of view, most people who complain of "night blindness" have acquired it as their refraction changes. How common is CSNB? I can't find specific incidence/prevalence, but I know the "variable" type of night blindness well enough. From a quick review, I'm sure we've all missed some, especially the "incomplete" type. But I suspect the incidence among "healthy" people is pretty low. The AD variety often occurs with albinism, nystagmus, autism, and such. It's fascinating that the x-linked variety associates with myopia. -MT I have CSNB-X (x-linked). Myopia is a variable symptom of CSNB. Ranging from mild to severe. My BCVA is around 20/40 with total night-blindness. I can drive during daylight hours but not a night. A male relative (hence the x-link) is faaar less myopic and can drive at night. >>I think you would be surprised at the number of people who have CSNB >>(Congenital Stationary Night Blindness). [quoted text clipped - 12 lines] > > -MT |
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