Vocabulary Lesson 101

There are certain things that eye care practitioners use that you might not know. Well, take a look at these words and tune into their "secret codes".

PD: Interpupillary Distance, the distance between your eyes that a practitioner will measure in order to make the focal points on your lenses right over your eyes.
Edge: To cut the lenses
Groove: The side of the lens is in a semi-rimless frame. It is grooved out in order to be held with the nylon line.
Bevel: The side of the lens that is held into a full frame. It looks like a "V".
Bifocal: The name given to set of lenses that correct both distance and near
Flat-top: A bifocal lens that has a "half-moon" on the bottom of the lens that corrects for near
No-line Bifocal: A bifocal lens that corrects both distance and near without a line. Also known as an invisible bifocal
Progressive: A no-line bifocal
Photo-Chromatic: Lenses react to UV and turn darker
Transition: A branded Photo-Chromatic lens. (Think Kleenex, actually being facial tissue)


And how you know a little bit more about their "secret language"