REFRACTIVE ERROR Meaning and
Definition
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Refractive error refers to a common vision problem characterized by an abnormality in the way light is focused by the eye, resulting in blurred or distorted vision. It occurs when the shape of the eye prevents light from properly focusing on the retina, the light-sensitive tissue located at the back of the eye that converts light into electrical signals for the brain to interpret.
There are four main types of refractive errors: myopia, hyperopia, astigmatism, and presbyopia. Myopia, or nearsightedness, occurs when distant objects appear blurry while close objects remain clear. Hyperopia, or farsightedness, causes close objects to appear blurred while distance vision remains clearer. Astigmatism is characterized by distorted vision at any distance due to the irregular shape of the cornea or lens. Presbyopia is an age-related condition that affects the eye's ability to focus up close.
Refractive errors are often caused by the natural shape of the eyeball, which may be too long or too short, or by irregular shaping of the cornea or lens. They can also be influenced by genetic factors, environmental conditions, or certain medical conditions. Refractive errors can be corrected with the use of eyeglasses, contact lenses, or refractive surgery, such as LASIK or PRK. Regular eye exams are essential in diagnosing and managing refractive errors to maintain optimal visual acuity.
Common Misspellings for REFRACTIVE ERROR
- eefractive error
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- refeactive error
- refdactive error
Etymology of REFRACTIVE ERROR
The word "refractive" comes from the Latin word "refractus", which means "broken" or "bent back". It is derived from the verb "refringere", meaning "to break" or "to bend". The word "error" comes from the Latin word "error", which means "a wandering" or "a mistake". When combined, "refractive error" refers to a mistake or deviation in the bending of light as it enters the eye, leading to blurry vision.
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