NCLE practice 4 of 7

The surface wettablilty of a contact lens is referred to as the:

• wetting angle

• hydrophobia

• hydrophillia

• moisture chamber

When fitting GP lenses intrapalbebrally, the fitter fits the lenses

• large diameter and steep base curve

• large diameter and flat base curve

• small diameter and steep base curve

• small diameter and flat base curve

The distance between a flat surface and the back surface of the central portion of a lens is referred to as

• wetting angle

• peripheral curve width

• lens diameter

• sagittal depth

A Lenticular Flange refers to the increase or decrease in anterior lens thickness to aid in lens positioning. If a high minus lens is riding too high or the edge of the lens is too thick the fitter would order a

• Hyperflange

• Myoflange

A Lenticular Flange refers to the increase or decrease in anterior lens thickness to aid in lens positioning. If a high plus is riding too low, a ________ can be designed to pull the lens under the upper lid and center the lens after the blink

• Hyperflange

• Myoflange

Vertexting for contact lens begins at

• +4.00 D

• +7.00 D

• +/-4.00 D

• +/- 7.00 D

A change in the CPC by .05 mm will also change the anterior curve of the lacrimal lens by

• 0.25 D

• 0.50 D

• 0.75 D

• 1.00 D

When the CPC is fit flatter, the tear lens creates minus sphere power, therefore

• SAM

• FAP

When the CPC is fit steeper, the tear lens creates plus sphere power, therefore

• SAM

• FAP

A first generation gas permeable lens

• PMMA

• Glass

• Haptic