An autorefractor or automated refractor is a computer-controlled machine used during an eye examination to provide an objective measurement of a person's refractive error and prescription for glasses or contact lenses. This is achieved by measuring how light is changed as it enters a person's eye. The Auto Refractor/Keratometers featuring the following measuring Modes; REF: Refractive measurement KER: Corneal curvature radius REF/ KER: Both Refractive as well Keratometry Mode CLBC: Contact Lens Base Curve measurement RET .ILLUM: Retro-illumination IOL: IOL OK APD: Auto Pupil Distance APM: Auto Pupil Diameter
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