Manufacturing, Lensometry, ANSI, Spotting Blanks W2 Flashcards
An uncut lens that is premade and does not have to be custom surfaced.
stock, finished lens
These lenses are the most basic type of lens. It has the same sphere/cylinder combination over the entire surface of the lens.
single vision lenses
lens that has the desired curvature on only one side of the lens. The lens has additional thickness that allows the other side of the lens to be cut to the proper curvature and finished thickness during the surfacing process.
semi-finished blank
A lens having optics that vary in power gradually from the distance to near zones.
Progressive addition lenses
A lens that has one or more visibly demarcated areas where the refractive power is distinctly different from the rest of the lens.
segmented multifocal lenses
A lens made from a liquid resin material being injected or poured into a gasket (encasing used to form the lens) and allowed to harden. This process can be used to make finished and semi-finished lens blanks.
Cast molded lenses
A lens made by gluing a finished front wafer and finished back wafer together.
Laminated Lenses
A finished lens is often referred to as a because the lens has not been cut down to the shape of the frame.
Uncut lens
Of the following steps in lens fabrication, which process occurs last? blocking, grooving, edging and spotting
Grooving
Steps of edging process
Finding lens axis and MRP locations
Centration
Blocking
Edging
The process of putting a beveled lens in a frame is
Lens insertion
the process of putting a grooved or drilled lens in the frame is
Lens Mounting
Lens clocks are calibrated for an index of
1.530
As a plus lens blank increases in diameter, the ___ will also increase.
Center thickness and weight
