I completed a full ophthalmological examination (except for fluorescent angiography). Also I was examined by a neurologist, but no answers.
Clarify, please: if it was an atypical migraine, then:
1. The spot would always be visible, and not only with blinking.
2. The spot would be well seen with closed eyes.
3. The spot would not be transparent.
4. A spot would be in two eyes.
Are these the correct theses?
p.s. in 90% of cases this spot appears with severe visual fatigue. However, my doctor believes that eye fatigue never leads to such spots. He also believes that if the cause is often fatigue, then this is something similar to migraine (I also suffer from visual snow).
You need more testing before saying: "ophthalmic exams are clean" You would need to see an Eye MD ophthalmologist and besides a glasses test and dilated exam need: Macular and never fiber layer OCT, Visual Field and Amsler tests and possible a fluoroscene angiography. If it is an atypical migraine scotoma (an exclusion diagnosis after all other tests done). You should be able to see it with your eyes completely shut.