Wednesday, May 21, 2014 11:00 AM
Glass, Polycarbonate, CR-39, Trivex, 1.60... So many lenses, so little time! Do you ever find yourself overwhelmed by the amount of lens material options available on today's market?
Tuesday, November 22, 2011 12:12 AM
Read this course to understand how aspheric lenses allow flatter lenses
without sacrificing the optics of best form spherical design lenses.
Tuesday, November 22, 2011 12:00 AM
In an analysis of prescriptions received by the laboratory, as many as 46 percent of the cylinder prescription distribution is equal to or more than 0.75 diopters (Fig. 4).
Monday, November 21, 2011 11:43 PM
The opportunities for single-vision aspheric lenses are relatively well known. Aspheric lenses improve the cosmetics of a pair of glasses by using surface curves that are flatter centrally and progressively flattened (in plus prescriptions) as one moves from lens center to edge.
Wednesday, November 9, 2011 11:42 PM
In contemporary frames, we have new challenges. First, smaller frames tend to be “flatter”. in larger frames, lenses often bulge out the front especially in plus powers.
Wednesday, November 9, 2011 12:44 AM
Mrs. Jefferson, a new patient wants desperately to make her new glasses look better than the ones she's wearing now. She was on a strict budget last time so they were plastic lenses and frames, no AR. She's chosen a semirimless that is the same 52 eyesize, Rx is +3.50 sphere.