Test Your Eyeglasses Knowledge

1. Which lens material is safest for children and active adults?

polycarbonate plastic
CR-39 plastic
glass

2. Anti-reflective lenses do which of the following?

eliminate reflections so more light enters your eyes
make your lenses "invisible" so people can see your eyes
improve night vision
all of the above

3. The glasses that change to sunglasses when you go outside are called:

transitional
change-ups
variable-tint
photochromic

4. A metal used for eyeglass frames that will bend, but not break, is called:

a miracle
stainless steel
memory metal

5. High-index and aspheric lenses:

are scratch-proof
reduce glare
are thinner than other lenses
give you X-ray vision

6. The additional prescription in a trifocal versus a bifocal is usually in what range?

near
intermediate
far

7. "No-line bifocals" are called:

progressive
profuse
diffuse
parsimonious

8. Which of the following is/are never made of polycarbonate?

eyeglass lenses
bulletproof glass
Plexiglas
space shuttle windshields

9. The best eyeglass frame shape to complement your face:

should be the same shape as your face shape
should contrast with the shape of your face
has nothing to do with your face shape