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The ability to give sight to a blind person via a bionic eye depends on the circumstances surrounding the loss of sight. For retinal prostheses, which are the most prevalent visual prosthetic under development (due to ease of access to the retina among other considerations), patients with vision loss due to degeneration of photoreceptors (retinitis pigmentosa, choroideremia, geographic atrophy ...
The condition also results when two eyes do not function together properly as described here. Most stereoblind persons with two healthy eyes do employ binocular vision to some extent, albeit less than persons with normally developed eyesight. This was shown in a study in which stereoblind subjects were posed with the task of judging the ...
The pupil of the human eye can range in size from 2 mm to over 8 mm to adapt to the environment. The human eye can detect a luminance from 10 −6 cd/m 2, or one millionth (0.000001) of a candela per square meter to 10 8 cd/m 2 or one hundred million (100,000,000) candelas per square meter.
Biomimetic architecture is a branch of the new science of biomimicry defined and popularized by Janine Benyus in her 1997 book (Biomimicry: Innovation Inspired by Nature). ). Biomimicry (bios - life and mimesis - imitate) refers to innovations inspired by nature as one which studies nature and then imitates or takes inspiration from its designs and processes to solve human problem
If the eye did not move at all, the person has orthophoria. Most people have some amount of exophoria or esophoria; it is quite normal. If the uncovered eye also moved vertically, the person has hyperphoria (if the eye moved from down to up) or hypophoria (if the eye moved from up to down). Such vertical phorias are quite rare.
Cross-eye: M68: Upward rolling of eyes: The onset of the symmetrical 14 is immediately preceded or accompanied by an upward rolling of the eyes. 69: Eyes positioned to look at other person: The 4, 5, or 7, alone or in combination, occurs while the eye position is fixed on the other person in the conversation. M69: Head or eyes look at other person
Five classical groups of opsins are involved in vision, mediating the conversion of a photon of light into an electrochemical signal, the first step in the visual transduction cascade. Another opsin found in the mammalian retina, melanopsin, is involved in circadian rhythms and pupillary reflex but not in vision. Humans have in total nine opsins.
The use of noninvasive fMRI studies have shown that there is evidence of mirroring in humans similar to that found in monkeys in the inferior parietal lobe and part of the inferior frontal gyrus. [8] Humans show additional signs of mirroring in parts of the brain not observed to show mirroring properties in primates, such as the cerebellum. [9]