What Is a Refractive Error?
A Refractive Error Is an Eyesight Problem
Refractive errors are a common reason for reduced level of eyesight (visual acuity).
Refraction refers to the bending of light. In terms of the eye, a refractive error means that the eye cannot focus light on to the retina properly. This usually occurs either due to abnormalities in the shape of the eyeball, or because age has affected the workings of the focusing parts of the eye.
There are four types of refractive error:
- Myopia (short sight).
- Hypermetropia (long sight).
- Astigmatism (a refractive error due to an unevenly curved cornea).
- Presbyopia (age-related long sight).
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