If you have a certain eye condition called optic disc drusen, a brain wave test might show delayed signals — not because of nerve damage, but just because of that eye issue. This could be mistaken for a serious nervous system disease like multiple sclerosis in young adults.

What we've found so far is that optic disc drusen may lead to delayed visually evoked potentials — a test that measures how quickly the brain responds to visual signals — and this delay could resemble patterns seen in demyelinating diseases like multiple sclerosis, even when there is no optic neuritis [1]. Our analysis of the available research shows that in people with optic disc drusen, a common but often unnoticed eye condition, the brain’s response to visual stimuli can appear slowed on testing [1]. This delay is not necessarily a sign of nerve damage or diseases like multiple sclerosis, but rather seems to be linked directly to the presence of the drusen themselves [1]. Because the test results can look similar to those seen in demyelination, there’s a risk this finding might be misinterpreted, especially in younger adults who are being evaluated for neurological conditions [1]. The evidence we’ve reviewed leans toward the idea that optic disc drusen alone can affect the results of visual evoked potential tests, even without any signs of optic nerve inflammation or damage [1]. We have not found any studies that contradict this observation, though only one distinct assertion has been analyzed so far. Because our current analysis is based on limited input, we can’t say how common this effect is or how strongly it mimics demyelinating disease. More research may help clarify when and why this happens. Practical takeaway: If you have optic disc drusen and are undergoing tests for vision or neurological issues, those results might show delays that look concerning — but they may not mean you have a serious nerve condition. Always consider the full picture with your doctor.