Optic Topic

face - understanding eyeglass prescriptions

Optic Topic by Steven A. Queenan at Regional Eye Optical – Week of December 9, 2018

To understand your lens prescription, it helps to know that the refractive power of a lens is measured in “diopters” (D). One diopter is the lens strength required to focus parallel rays at a distance of one meter. It takes a total refractive power of about 60 diopters to focus light on a retina that sits 22.22 millimeters behind the eye’s refractive surface.

If the focal point falls in front of the eye retina, the eye is “nearsighted.”. If it falls behind the retina, it is “farsighted.”

These refractive errors can be corrected with a concave (minus) lens to move the focal point further back in the nearsighted eye, or a convex (plus) lens to move the focal point forward in the farsighted eye. Nearsighted people typically experience blurred vision when looking at objects that are far away. Farsighted people typically see things well when far away, buy encounter blurring when looking at things close up.

Inside REGIONAL EYE OPTICAL, you will find frames featuring the latest technology, including titanium and stainless steel with spring-loaded hinges, as well as magnetic clip-on sunglasses. You’ll also find single vision, bifocal, and trifocal lenses, all available with the latest in anti-reflective and scratch resistant coatings.

To learn more, please call 320-587-6309. We are located just inside Regional Eye Center at 1455 Montreal Street, SE in Hutchinson, MN. Our business hours are:

Mon. & Thurs. 8:00am – 7:30pm
Tues. & Wed. 8:00am – 5:30pm
Fri. 8:00am – 4:00pm
Sat. 8:30am to Noon (Sep-May)