autorefractors

An autorefractor is a device used by eye care professionals to measure how light changes as it enters your eyes, helping to determine your eyeglass or contact lens prescription. It works by shining a light into your eye and measuring the way it reflects back. This measurement provides an initial estimate of your refractive error—whether you are nearsighted, farsighted, or have astigmatism. The process is quick, non-invasive, and often used to assist in the eye exam, providing a starting point for more detailed tests and ensuring accurate corrective prescriptions.