![]() The refraction determines your level of hyperopia (farsightedness), myopia (nearsightedness), astigmatism and presbyopia. He or she will then ask you which of the two lenses in each choice looks clearer.īased on your answers, your eye doctor will continue to fine-tune the lens power until reaching a final eyeglass prescription. This is the test that your eye doctor uses to determine your exact eyeglass prescription.ĭuring a refraction, the doctor puts the instrument called a phoropter in front of your eyes and shows you a series of lens choices. This test is especially useful for children and patients who are unable to accurately answer the doctor's questions. This test estimates which lens powers will best correct your distance vision.īased on the way the light reflects from your eye, your doctor is able to estimate the power of eyeglasses required to correct your vision. As you stare at the "E," your eye doctor will shine a light at your eye andįlip lenses in a machine in front of your eyes. In retinoscopy, the room lights will be dimmed and you will be asked to focus on a large target (usually the big "E" on the eye chart). Your eye doctor may perform this test early in the eye exam to obtain an approximation of your eyeglass prescription. If you can correctly identify the "closer" circle in each pattern, you likely have excellent eye teaming skills that should enable you to experience normal depth perception. Each pattern has four small circles, and your task is to point out which circle in each pattern looks closer to you than the other three circles. In one commonly used stereopsis test, you wear a pair of "3D" glasses and look at a booklet of test patterns. Stereopsis is the term used to describe eye teaming that enables normal depth perception and appreciation of the 3-dimensional nature of objects. Problems with eye movements can cause eye strain and may affect reading ability, sports vision and other skills. If quick eye movements ("saccades") also are tested, your eye doctor might have you move your eyes back and forth between two targets positioned some distance apart from each other. Your eye doctor will have you hold your head still and ask you to follow the slow movement of a hand-held light or other target with just your eyes. ![]() Testing of smooth eye movements ("pursuits") is more common. Ocular motility testing is performed to determine how well your eyes can follow a moving object and/or quickly move between and accurately fixate on two separate targets. The test is then repeated with you looking at a near object.ĭuring these tests, your eye doctor will assess whether the uncovered eye must move to pick up the fixation target, which could indicate strabismus or other problem that could cause eye strain or amblyopia ("lazy eye"). While there are many ways for your eye doctor to check how your eyes work together, the cover test is the simplest and most common.ĭuring a cover test, your eye doctor will ask you to focus on a small object across the room and will then cover each of your eyes alternately while you stare at the target.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |