This is impossible, since the entire image and its halo as well may lie within the blind-spot.
This blind-spot is not particularly of interest here, but it may be of interest to note its effect.
It may well occur, then, that in a movement the image happens to fall on the blind-spot and not on the fovea.
It may be said that the image of h happens to fall on the blind-spot, e and e being above and below the same.
A three-foot circle at a distance of 36 feet will completely disappear if its image falls directly upon the blind-spot.
1864, "spot within one's range of vision where yet one cannot see." Of flaws in the eye, from 1872; figurative sense in use by 1907.
blind spot n.
See optic disk.
The area of blindness in the visual field corresponding to the optic disk. Also called physiologic scotoma, punctum cecum.
An area or facet of one's personality of which one remains ignorant or fails to gain understanding. Also called mental scotoma, scotoma.
Note: In a general sense, the term is used to refer to an inability to see things that might be obvious to another observer: “He has a blind spot as far as his daughter's behavior is concerned.”