Clinical Refraction

 Clinical refraction is a diagnostic test used to determine the eyeglass or contact lens prescription needed to correct vision problems. It is often performed by an eye doctor or other healthcare professional during a comprehensive eye exam.

There are several different techniques that can be used to perform clinical refraction, including retinoscopy, autorefraction, and subjective refraction. Each technique has its own advantages and disadvantages, and the specific technique used may depend on the patient's age, visual acuity, and the equipment available.

Retinoscopy is a diagnostic test that uses a handheld instrument called a retinoscope to shine a beam of light into the eye and observe the reflection of the light as it bounces off the retina. Autorefraction is a diagnostic test that uses a machine to automatically measure the refractive error of the eye. Subjective refraction is a diagnostic test that involves the patient looking through a series of lenses and identifying which lens is clearer.

Clinical refraction is an important part of the eyeglass or contact lens fitting process. It helps the eye doctor determine the correct eyeglass or contact lens prescription to correct the patient's vision and improve their quality of life.

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