![Occasionally my vision goes black for a second and then returns to normal. It looks like someone flicked the light switch off and on very quickly, but isn't actually caused by flickering Occasionally my vision goes black for a second and then returns to normal. It looks like someone flicked the light switch off and on very quickly, but isn't actually caused by flickering](https://qph.cf2.quoracdn.net/main-thumb-331199323-200-drckkoszbhskjdcupcyiyyomjeaclpyi.jpeg)
Occasionally my vision goes black for a second and then returns to normal. It looks like someone flicked the light switch off and on very quickly, but isn't actually caused by flickering
When covering one eye and staring out the other, a big black circle appears over my vision. It goes away when I blink or move my eyes. What is this? - Quora
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Vorbi Ușor de întâmplat citesc o carte my vision goes black for a split second Tehnologie pereche aparat foto
Why does my vision gradually go black with sudden dizziness for a few seconds when I suddenly stand up? Is it normal? - Quora
![Occasionally my vision goes black for a second and then returns to normal. It looks like someone flicked the light switch off and on very quickly, but isn't actually caused by flickering Occasionally my vision goes black for a second and then returns to normal. It looks like someone flicked the light switch off and on very quickly, but isn't actually caused by flickering](https://qph.cf2.quoracdn.net/main-thumb-684047603-200-jejwgpwlgelqcrtzfrqtanejqpqsjcug.jpeg)
Occasionally my vision goes black for a second and then returns to normal. It looks like someone flicked the light switch off and on very quickly, but isn't actually caused by flickering
![Occasionally my vision goes black for a second and then returns to normal. It looks like someone flicked the light switch off and on very quickly, but isn't actually caused by flickering Occasionally my vision goes black for a second and then returns to normal. It looks like someone flicked the light switch off and on very quickly, but isn't actually caused by flickering](https://qph.cf2.quoracdn.net/main-thumb-1846652609-200-lltnnkgeltwjwhtrqtegqeuzodljvqvz.jpeg)
Occasionally my vision goes black for a second and then returns to normal. It looks like someone flicked the light switch off and on very quickly, but isn't actually caused by flickering
![Occasionally my vision goes black for a second and then returns to normal. It looks like someone flicked the light switch off and on very quickly, but isn't actually caused by flickering Occasionally my vision goes black for a second and then returns to normal. It looks like someone flicked the light switch off and on very quickly, but isn't actually caused by flickering](https://qph.cf2.quoracdn.net/main-thumb-1955839732-200-fbmegvvdpdydheqalxsjhvljppzfppyf.jpeg)