Glass Coatings Flashcards
1
Q
Scratch resistant
A
Advised for plastic lens
2
Q
Anti-Reflective
A
Detracts light at night Good for office setting Reduce computer screen glare Prone to dust and facial oils Both glass and plastic may be affected with lens flex (small cracks on coating)
3
Q
Single vision lens
A
View at one distance
4
Q
Bifocal lens
A
2 powers. Distance and reading
5
Q
Trifocals lens
A
3 powers. Distance, Intermediate, reading
6
Q
Progressive lens (PALS)
A
2 or 3 powers. No visible lines. Adjust head to view
7
Q
Occupational lens
A
For specific job or hobby
The “Add” power is positioned in a different area of lens (usually at top)
8
Q
Computer lens
A
Blue light filter to block high energy visible light
Good for High computer use
Disadvantage- looking at close or across room is blurry
Progressive addition lens -distance at top and near at bottom
