A refraction test is an eye exam that measures a person's prescription for eyeglasses or contact lenses. It is usually done as part of a routine eye exam and is also known as a refractive eye test. This test helps an eye doctor determine the exact prescription needed for eyeglasses or contact lenses. It is also used to diagnose refractive errors.The frequency of refraction tests depends on factors such as age, health, and risk of developing eye problems.
But what can you expect from a refraction test? How do optometrists accurately determine the prescription for their lenses? And what do those numbers on your lens prescription mean?The refraction test begins with the optometrist asking the patient to look through a device called a phoropter. This device contains different lenses that the optometrist can switch out to determine which lens strength is best for the patient. The optometrist will ask the patient which lens looks clearer and then adjust the lenses accordingly.Once the optometrist has determined the best lens strength, they will use a machine called an autorefractor to measure the patient's vision more accurately. The autorefractor uses light and mirrors to measure how light is bent when it enters the eye.
This helps the optometrist determine the exact prescription needed for eyeglasses or contact lenses.The numbers on your lens prescription indicate the amount of correction needed for each eye. The first number indicates how much correction is needed for nearsightedness, while the second number indicates how much correction is needed for farsightedness. The third number indicates how much correction is needed for astigmatism.At Eye Care Professionals, our team of experienced optometrists can help you see better with a comprehensive refraction test. We use state-of-the-art technology to accurately measure your vision and determine the best prescription for your eyeglasses or contact lenses.