Instruments in Optometric Practice

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What is the purpose of a keratometer?

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.

What is a retinoscope used for?

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

What is the purpose of trial lens and frame in refraction?

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

What is a phoropter used for?

<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

What is an auto-refractor used for?

<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