Instruments in Optometric Practice

The purpose of a keratometer is to measure the curvature of the anterior surface of the cornea, mainly for assessing the extent and axis of astigmatism.

A retinoscope is used to obtain an objective measurement of the refractive error of a patient's eyes.

The purpose of trial lens and frame in refraction is to identify the refractive error of the patient.

<p>A phoropter is an ophthalmic device used in subjective refraction. It contains different lenses used to measure an individual's refractive error and determine their eyewear prescription.</p> Signup and view all the answers

<p>An auto-refractor is an optical device used in an eye examination to provide objective measurements of an individual's refractive error.</p> Signup and view all the answers