a watch problem, particularly nearsightedness, farsightedness, or astigmatism, resulting from defective refractive ability of the eye.
any one of several conditions of the attention (spherical or cylindrical) caused by faulty refractive capability.
a visual impairment resulting from defective refraction of light rays when you look at the eye. Subtypes consist of myopia astigmatism and hyperopia.
A condition associated with the attention which will be unusual with regards to refraction: the opposite of emmetropia. It comprises myopia, hypermetropia, presbyopia, and astigmatism. See these words.
(ophthalmology) faulty refraction of light rays in attention like in astigmatism or myopia