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OPAn auto-refractometer is a device used in eye care to measure the refractive error of the eye automatically. In simpler terms, it helps determine whether a person is nearsighted (myopia), farsighted (hyperopia), or has astigmatism, which is needed to prescribe glasses or contact lenses.
Hereβs a bit more detail:
β’ The patient looks into the machine at a target (usually a small picture or light).
β’ The device shines light into the eye and measures how it bends (refracts) inside the eye.
β’ Based on this, it calculates the eyeβs lens power needed for correct focus.
β’ Itβs quick, non-invasive, and usually accurate, but the results are often refined with a manual refraction test by an eye doctor (optometrist or ophthalmologist).
Basically, think of it as a fast βstarterβ measurement to see what kind of glasses or contact lenses someone might need.
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