why retina dis-attachment some times can cause that - the person can see places close to the top of her/his head, the bottom of his/her chin,

that is, those places normal eyes can not see.

4 hours ago, PeterBushMan said:

why retina dis-attachment some times can cause that - the person can see places close to the top of her/his head, the bottom of his/her chin,

that is, those places normal eyes can not see.

!

Moderator Note

Please establish that this is true.

 

Retinas don't  detach and flop up/down at angles which might extend your field of view in a particular direction.
What usually happens is that the gelatinous substance in the back of the eye, 'srinks' as it dries with age, makes small tears in the retina, and the gelatinous fluid can get under it. A 'blister' of the retina forms and, if not corrected, scar tissue/ blood pools under it leading to loss of vision.

In any case, you wouldn't be able to see around corners or through them, to view the top of your head or your chin.

17 hours ago, MigL said:

Retinas don't  detach and flop up/down at angles which might extend your field of view in a particular direction.
What usually happens is that the gelatinous substance in the back of the eye, 'srinks' as it dries with age, makes small tears in the retina, and the gelatinous fluid can get under it. A 'blister' of the retina forms and, if not corrected, scar tissue/ blood pools under it leading to loss of vision.

In any case, you wouldn't be able to see around corners or through them, to view the top of your head or your chin.

Thanks for answer,

I saw a reference,  some Retina -dis-attachment change its shape, that cause the person can an angle which normal eyes cant see.

 

let's say the retina is like a plastic sheet, and it changes its shape, it is no longer flat. from ---- shape  to /\ shape or aother shape.

 

Edited July 6, 20214 yr by PeterBushMan