Lens & Frame

____ frame commonly has a metal chassis and plastic top rims.

• a. Balgrip

• b. Half-eyes

• c. Combination

• d. Semirimless

• e. Numont

____ has two holes per lens and a metal reinforcing arm that follows the upper posterior surface of the lens.

• a. Balgrip

• b. Half-eyes

• c. Combination

• d. Semirimless

• e. Numont

____ holds the lenses in place only at their nasal edge.

• a. Balgrip

• b. Half-eyes

• c. Combination

• d. Semirimless

• e. Numont

Which type of temple curves around the ear following the crotch of the ear where ear and head meet, extending to the level of the earlobe? This type of temple is usually plastic, and is often used in children’s and safety frames.

• a. library

• b. skull

• c. riding bow

• d. convertible

____ secures the lenses in place with clips attached to a bar of tensile steel that fits into a slot on each side of the lenses.

• a. balgrip

• b. half-eyes

• c. semirimless

• d. nylon cord

This follows the bridge of the nose smoothly, spreading the weight of the frame and using nose pads attached to the back of the bridge.

• a. keyhole bridge

• b. modified saddle bridge

• c. saddle bridge

• d. pad bridge

• e. none of the above

____ used primarily for sport or safety purposes. Does not adjust well. Does not work well for conventional eyeglasses.

• Metal

• Combination

• Plastic

• Polycarbonate

For lenses of equal powers and thicknesses, which lens material shows greater impact resistance when tested using a small, high velocity projectile?

• a. an untreated crown glass lens

• b. a chemically tempered crown glass lens

• c. a chemically tempered photochromic lens

• d. a CR-39 lens

What is the standard “referee test” for determining impact resistance suitable for dress ophthalmic lenses?

• a. a 1-inch steel ball dropped on the front surface of the lens from a height of 50 inches

• b. a 1-inch steel ball dropped on the front surface of the lens from a height of 52 inches

• c. a five-eighth-inch steel ball dropped on the front surface of the lens from a height of 50 inches

• d. a five-eighth-inch steel ball dropped on the front surface of the lens from a height of 52 inches

• e. a one-fourth-inch steel ball shot at the front of lens at a speed of 150 feet/sec

The “duty to inform” someone of the safest options for their eyewear needs is:

• a. a legal responsibility.

• b. a professional responsibility.

• c. both a professional and a legal responsibility.