Retinoscopy is a word used in ophthalmology to describe a type of eye exam where the doctor uses a light to determine the prescription needed for glasses or contact lenses. Some synonyms for retinoscopy include refractive examination, vision testing, eye refraction, and visual acuity testing. Other related terms include autorefractor, which is a machine that automatically measures the refractive error of the eye, and subjective refraction, which is a method of measuring the patient's refractive error by asking them to compare various lens options. Overall, these terms all refer to the process of determining a patient's eyeglass prescription, which is an essential component of good eye health.