W8 Lens Insertion, Rx Aligner, & Standard Alignment Flashcards
textbook mentions two methods for inserting lenses into plastic frames:
to insert the outer edge and the upper nasal portions of the lens in the frame and snap the
lower nasal into place
to insert the outer edge of the lens in the frame and snap the nasal edge into place
After a lens is inserted, they should be checked to ensure the lens is entirely in the groove of the eyewire. What should you look for?
ensure that any progressive 180 markings or segment tops are straight along the frames 180 line
ensure that the eyewire is flat and uniformly rounded on the outside
ensure there there is no nasal humping
ensure that the lens is not rotated
a pulling of the eyewire such that it covers less of the front of the lens bevel than back orvice versa.
rolled eyewire
Cellulose Acetate
Hot air
Nylon
Hot water
Carbon Fiber
No Heat
Polyamide
no heat
Polycarbonate
No Heat
Optyl
Hot air
Alternative Cellulose acetate
Hot salt or bead pan
Alternative Nylon
Hot air
Alternative Carbon fiber
hot air at low temp
Alternative Polyamide
No alternate method
Alternative Polycarb
No alternate method
Alternative Optyl
No alternate method
