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Eyecup goggles completely cover the eye socket to give all-round protection. They have adjustable or elasticized headbands and often are equipped with ventilation ports to allow air in and prevent fogging. For example, swimming goggles to protect the eyes from salt or chlorine. Cover goggles are designed to be worn over eye wear. [1]
Comparison of uncoated glasses (top) and glasses with an anti-reflective coating (bottom). Antireflection coatings are used to reduce reflection from surfaces. Whenever a ray of light moves from one medium to another (such as when light enters a sheet of glass after travelling through air ), some portion of the light is reflected from the ...
Kohl is an eye cosmetic, traditionally made by crushing stibnite (antimony sulfide) for use similar to that of charcoal in mascara. It is widely used throughout the Arabian culture, typically as eyeliner to contour or darken the eyelids.
Using a phoropter to determine a prescription for eyeglasses. An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist, that specifies the value of all parameters the prescriber has deemed necessary to construct and/or dispense corrective lenses appropriate for a patient.
The post This Is What Those Numbers on Your Glasses Mean appeared first on Reader's Digest. The numbers on your eyewear are more important than you think—an optometrist tells us why. The post ...