There are estimated 168 million people who wear prescription eyeglasses in the United States. Only a very small percentage of those people could tell you what strength their lenses are or read an eyeglass prescription.

The strength of prescription eyeglasses is measured in what we call diopters. Optometrists abbreviate that with a D. The stronger the lens, the higher the diopter measures. Prescription eyeglass lenses are measured in positives or negatives. If you look through a negative lens the object that you are focusing on will look smaller. If looking through a positive lens, the object will look bigger.

There are three professions that deal with prescription eyeglasses that many people are not aware of. The first profession is called an Optician. An Optician makes the lenses, frames and contact lenses. They analyze the prescription and then dispense medications and prescription eyeglasses.

The Ophthalmologist is an eye doctor who is Read the rest of this entry »

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