Most lay people call the temple an arm, so how did the arm get to be named a temple? I was actually very curious about this. First a temple is: The flat region on either side of the forehead. Either of the sidepieces of a frame for eyeglasses that extends along the temple and over the ear. Comes from: Middle English, from Old French, … [Read more...]
Normally, this would have been at the most a 2 paragraph answer, but little did I know eye tracking. The following is from wikipedia: Eye tracking is the process of measuring either the point of gaze ("where we are looking") or the motion of an eye relative to the head. An eye tracker is a device for measuring eye positions … [Read more...]
The abbreviation stands for “Columbia Resin #39,” because it was the 39th formula of a thermosetting plastic developed by the Columbia Resins project in 1940. Signet Armorlite Lens Company in California is credited with manufacturing the first CR-39 eyeglass lenses in 1947. CR-39 is now a trade marked product of PPG Industries and used by many … [Read more...]
Red is the rarest color for humans because it it mainly seen in albinos. Violet- is also rare and mainly seen in albinos. Violet eyes are either a form of blue eyes or a mutation. Black Is the Rarest eye color. Some people who claim to have black eyes actually have dark brown. Green- Only 1-2% of the world is born with green … [Read more...]
Who would have thought there is no real answer as to where Rx came from. The most common theory is that Rx is an abbreviation for the Latin word for 'recipere' which means 'to take' or to take thou. This symbol originated in medieval manuscripts as an abbreviation Px is the symbol meaning prescription which is sometimes transliterated as … [Read more...]
Optical Lenses and Coating Glossary Anti-Reflective Coating: This is a coating which can be applied to the outside or inside surface of any lens (clear or sun lens) to minimize the amount of light reflected by your lenses. It reduces reflections and glare. Reflections and glare may cause headaches or interfere with vision clarity. Regular lenses … [Read more...]
The best Guide For Managed Care Terminalogy that we have found is from Pohly's Net Guide It Starts out with: AAPCC - see Adjusted Average Per Capita Cost. ABC - see Activity-Based Costing. Abuse - When used as a legal term in the business of healthcare, it normally refers to actions that do not involve intentional misrepresentations in … [Read more...]
20/20 -the expression for normal eyesight (or 6/6 in countries where metric measurements are used). This notation is expressed as a fraction. The numerator (1st number) refers to the distance you were from the test chart, which is usually 20 feet (6 meters). The denominator (2nd number) denotes the distance at which a person with normal eyesight … [Read more...]
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