A patient with<unk>  has no vision but the response of his/her pupil to light is intact (as the reflex does not involve the cortex). Therefore, one diagnostic test for<unk>  is to first objectively verify the optic nerves and the non-cortical functions of the eyes are functioning normally. This involves confirming that patient can distinguish light/dark, and that his/her pupils dilate and contract with light exposure. Then, the patient is asked to describe something he/she would be able to recognize with normal vision. For example, the patient would be asked the following: * "How many fingers am I holding up?" * "What does that sign (on a custodian's closet, a restroom door, an exit sign) say?" * "What kind of vending machine (with a vivid picture of a well-known brand name on it) is that?" Patients with<unk>  will not be able to identify the item being questioned about at all or will not be able to provide any details other than color or perhaps general shape. This indicates that the lack of vision is neurological rather than ocular. It specifically indicates that the occipital cortex is unable to correctly process and interpret the intact input coming from the retinas. Fundoscopy should be normal in cases of<unk> .<unk>  can be associated with visual hallucinations, denial of visual loss (Anton–Babinski syndrome), and the ability to perceive moving but not static objects. (Riddoch syndrome).
Cortical blindness
Color blindness
Visual impairment
Inattentional blindness
Cortical deafness
Childhood blindness
Computer vision syndrome
Cortical visual impairment