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Anton syndrome, also known as Anton-Babinski syndrome and visual anosognosia, is a rare symptom of brain damage occurring in the occipital lobe.Those who have it are cortically blind, but affirm, often quite adamantly and in the face of clear evidence of their blindness, that they are capable of seeing.
In order to see a clear image, the eye must focus rays of light on to the light-sensing part of the eye – the retina, which is located in the back of the eye. This focusing – called refraction – is performed mainly by the cornea and the lens , which are located at the front of the eye, the anterior segment .
Every normal mammalian eye has a scotoma in its field of vision, usually termed its blind spot. This is a location with no photoreceptor cells, where the retinal ganglion cell axons that compose the optic nerve exit the retina. This location is called the optic disc. There is no direct conscious awareness of visual scotomas.
No abnormality detected (is frequently used but is not recommended) NCT: Non-contact tonometer ND: Neutral density filter NLP: No light perception No light perception is considered total visual impairment, or total blindness; see Visual impairment#Classification: NPC: Near point of convergence or no previous correction NRC Normal retinal ...
Aniridia is a condition characterized by the absence or near absence of the iris, the colored, muscular ring in the eye that controls the size of the pupil and regulates the amount of light entering the eye. This absence results in a primarily black appearance of the central eye.
Based in Israel, 6over6 Vision previously raised $15 million to commercialize its in-home eye exams based on a combination of machine learning and sensors. 1-800 Contacts buys the at-home eye exam ...
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