Your optometrist determines the type and degree of refractive error you have by performing a refraction test. This can be done with a computerized instrument (automated refraction) or with a mechanical instrument called a phoropter that lets your eye doctor to show you one lens at a time. Often, an automated refraction test will [...]
The eye's ability to refract or focus light sharply on the retina is primarily based on three eye anatomy features: the overall length of the eye, 2) the curvature of the cornea and 3) the curvature of the lens inside the eye. Eye length: If the eye is too long, light is focused before it [...]
How the eye sees The process of vision begins when light rays that reflect off objects and travel through the eye's optical system are refracted and focused into a point of sharp focus. For good vision, this focus point must be on the retina. The retina is the tissue that covers the inside of [...]
Vision issues are often the main reason a person seeks the services of an optiometrist, but what does it really mean when we're told that our vision is blurry because we have a refractive error? We see the world around us because of the way our eyes bend (refract) light. Refractive errors are optical [...]
