According to the National Eye Institute, more than 150 million people in the United States have a refractive error – a defect that does not require the eye to focus images clearly on the retina. As a consequence, objects that are near or too far appear blurry and smudged. Eye refraction is the estimation of the required power for a person’s eyeglasses or contact lenses. This measurement is calculated based on a refraction test, which is typically a part of a routine eye examination. This test allows your eye doctor to find out what prescription you need in your glasses or contact lenses.
Also, a refraction test can help to detect other eye diseases as well as the likelihood that people will need vision correction. As a rule, a value of 20/20 is considered to be optimum, or perfect vision. If people don’t have 20/20 vision, they have what is called a refractive error. It means that the light is not bending correctly when it goes through the lens of the eye. If you’ve noticed trouble with seeing objects from close up or from a distance, visit our optical store at 280 Columbus Ave, Manhattan, and enjoy a comprehensive eye examination, including the refraction test. You can trust our highly qualified optometrists to get a proper diagnosis and glass or contact lens prescription.
Refraction Test Procedure
A refractive eye exam, also known as a vision test or simply a refraction, is the test performed by our professional optometrists to determine your vision prescription. It’s commonly performed as part of a comprehensive eye exam. The procedure is quick and simple, and brings no discomfort to a patient. First, our eye care specialist will lower a phoropter, a large tool covered in dials, switches and lenses. You will have to look through the device at a vision chart either 20 feet away or reflected on a mirror to appear 20 feet away. The test is performed one eye at a time.
The doctor will then adjust the power of the lenses, shifting or flipping lenses back and forth, asking you which options look better. Then, a phoropter shines specialized light into your eyes and also determines your refraction. This time, responses from you are not required. Each type of a refraction test has its own benefits. After this simple procedure, the optometrist will accurately determine your vision prescription and refractive error, if any. The four standard refractive errors are farsightedness, age-related farsightedness, nearsightedness and astigmatism. Visit EuroOptica, NYC to get the most accurate refraction test.