What term refers to a condition where a patient has one functioning eye?

The term that refers to a condition in which a patient has one functioning eye is "Monocular Patient." This designation is used in the field of optics and vision care to describe individuals who possess vision in only one eye due to various reasons, which could include congenital issues, injury, or disease affecting vision in the other eye.

Understanding this term is crucial for those in optical training because monocular patients may have unique needs when it comes to vision correction, eye protection, and overall vision health management. This understanding helps in providing appropriate services and products tailored to improving their quality of life and ensuring they receive optimal care.

The other terms listed refer to different conditions or characteristics: heterochromia describes a condition where an individual has two different colored eyes, low vision refers to visual impairments that are not correctable by standard glasses or contact lenses, and cataract patient denotes someone suffering from cataracts, which affects the clarity of the lens in the eye, often leading to blurry vision. None of these relate to having one functioning eye specifically.