If youāve discovered you might need vision correction during your eye examination, itās vital to determine just how āmuchā your eyes need to be corrected with lenses or contact lenses. This is called measuring your ārefraction.
Autorefractors automatically measure this value during an eye examination.
While seated with your chin in a stabilizing chinrest, youāll be asked to focus on an image or point of light. The autorefractor automatically determines the correction needed to place your āfocus pointā on top of the retina, the light-sensitive area at the back of the eye responsible for correctly processing images.
The measurement taken by an autorefractor can be translated into a prescription for eyeglasses.
In eye exams for small children, or for people with special needs who may have trouble sitting calmly during an extended exam, or verbally describing their vision problemsāautorefractors give highly accurate measurements used to determine vision correction needs, automatically.
How do autorefractors work?
Autorefractors only take a few moments to determine each measurement for each eye. Whatās more, autorefractors are quite reliable and are sometimes used in conjunction with a machine called a phoroptor to manually switch lenses in front of your eyes to provide ideal vision correction.
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