What is the term that describes an uncorrected refractive error?

The term that describes an uncorrected refractive error is asthenopia. While asthenopia itself refers to a condition characterized by eye strain or fatigue, it is often a result of uncorrected refractive errors such as nearsightedness (myopia), farsightedness (hyperopia), or astigmatism. In essence, individuals who have uncorrected refractive errors may experience symptoms associated with asthenopia, highlighting the impact refractive issues can have on visual comfort.

Astigmatism refers to a specific type of refractive error caused by an irregular curvature of the eye, leading to blurred vision. Emmetropia is the term for normal vision without refractive error, where light focuses directly on the retina. Hyperopia, or farsightedness, is a refractive error where distant objects may be seen more clearly than nearby objects, and it can also lead to asthenopia when uncorrected.