retinoscopy

Retinoscopy is an eye examination technique used to measure how light reflects off the retina, helping to determine a person's prescription for glasses or contact lenses. During the test, an eye doctor shines a light into the patient's eye and observes the movement of the reflection. By using various lenses, the doctor can identify whether the patient is nearsighted, farsighted, or has astigmatism. This objective method provides a foundation for assessing vision and helps in prescribing the appropriate corrective lenses for clearer sight.