What describes a condition in which one pupil is larger than the other?

Anisocoria is the term used to describe a condition in which the pupils are of unequal size; one pupil is larger than the other. This difference can be a normal condition for some individuals or could indicate an underlying medical issue that may require evaluation. It is important for those in the optical field to recognize this condition, as it may be associated with various eye or neurological problems.

The other choices don't accurately define the specific condition in question. A monocular patient refers to someone who has vision in only one eye. A low vision patient has significant visual impairment that cannot be completely corrected with glasses or contact lenses, while heterochromia describes a condition where an individual has two different colored eyes. None of these terms is related to the size disparity of pupils. Thus, anisocoria is the precise and relevant term for describing pupils of unequal sizes.