Monthly Archives: September 2014

What Is Pupillary Distance?

By: Anthony Tangeman

In a previous blog post Michael Walach described how to measure Pupillary Distance, or PD. Now we are here to tell you exactly what P.D. is and why it is important.

You can likely infer what PD means from its name: it is the distance between the centers of the pupils in millimeters. While a simple concept, this measurement is crucial in order to have glasses perfectly suited for your eyes.

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What Is Astigmatism?

By: Anthony Tangeman

Many people are frightened when their optician tells them they have astigmatism. While astigmatism is a fairly common vision condition, people often do not know what it actually is.

Astigmatism is one of the causes of blurry vision that occurs due to unequal curvature of the eye. Essentially, an eye with astigmatism is less perfectly round than one without it. An easy way to picture this condition is to imagine a baseball or basketball, both of which are perfectly round. Now picture an American football, which is egg-shaped. This egg shape is similar to an eye with astigmatism, except to a much lesser degree.

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How Do I Read My Child’s Eyeglasses Prescription?

By: Anthony Tangeman

Parents concerned about their child’s eyesight often want to have a better understanding of their child’s eyeglasses prescription.. By learning how to read a prescription, parents can better understand their child’s vision. Understanding a prescription comes down to learning the layout of a prescription and the meaning of each number and character.

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