The optics of Prescription EyeglassesWritten by Timothy Gorman
There are estimated 168 million people who wear prescription eyeglasses in 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 lens, higher diopter measures. Prescription eyeglass lenses are measured in positives or negatives. If you look through a negative lens object that you are focusing on will look smaller. If looking through a positive lens, 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 lenses, frames and contact lenses. They analyze prescription and then dispense medications and prescription eyeglasses.
The Ophthalmologist is an eye doctor who is licensed to perform surgeries that are needed to correct vision or aid in curing eye diseases.
Survey conducted on Prescription EyeglassesWritten by Timothy Gorman
Prescription eyeglasses and/or contact lenses are worn by over 60% of nations population today. The end of year 2006, it is estimated that 176 million people will be in need of vision correction.
A survey conducted by Vision Council of America showed that over 40 percent of subjects surveyed would wear either prescription eyeglasses or fashion eyeglasses whether they needed to or not. The survey also showed that 39% of people surveyed perceive people that wear eyeglasses to be smarter than those who do not. The biggest complaints, found in survey, were dirty eyeglasses and scratched lenses.
Only 53% of people surveyed that they knew what polarized lenses were on prescription eyeglasses. The function of Polarized lenses is to reduce glare. They are especially helpful to people who have just undergone cataract surgery and are very sensitive to bright lights. They are popular among boaters, skiers, drivers and any other hobbyist that glare cannot only be annoying, but dangerous.