CORRECT ANSWER: -1.00

ODP Contact Lens Pre-final Assessment 2 Latest Update - 100 Questions with 100% Verified Correct Answers with Guaranteed A+ Verified by Professor

A patient is fit with a -2.50 rigid diagnostic lens. You perform an over-refraction and get -

0.75 -0.25 x 98. What lens power should be ordered? - CORRECT ANSWER: -3.25

A patient refracted at a vertex distance of 13mm has a spectacle Rx of -1.00 -2.00 x 160 and K's of 42.50 @160 / 44.50 @70. A rigid lens with a back surface radius of 7.94 is

placed on the eye. The expected power of the contact lens needed would be: -

CORRECT ANSWER: -1.00

A plus power is best used for: - CORRECT ANSWER: Hyperopia

A reason to choose a higher DK fluorocarbon material over soft hydrogel is: -

CORRECT ANSWER: They are durable and require less frequent replacement

A toric contact is used to correct what refractive error? - CORRECT ANSWER:

Astigmatism

A well fit soft contact lens should: - CORRECT ANSWER: Completely cover the limbus during blinking

An enlarged thyroid gland can cause: - CORRECT ANSWER: Exophthalmos

As sagittal depth increases: - CORRECT ANSWER: Vaulting increases

• / 2

CAB lenses proved to be impractical for many reasons, one of which is? - CORRECT

ANSWER: They chipped easily

Contact lenses are classified as: - CORRECT ANSWER: Medical devices

Convert 43 diopters to millimeters. - CORRECT ANSWER: 7.85

Dryness related discomfort with a silicone hydrogel lens can be mistaken as: -

CORRECT ANSWER: An allergy

Express the Base curve of 39.50 diopters in millimeters. - CORRECT ANSWER: 8.54

HEMA is : - CORRECT ANSWER: A material that can soak up water

High water content in contact lenses can cause: - CORRECT ANSWER: Fluctuations in vision

How big is the usual truncation of a contact lens? - CORRECT ANSWER: 0.5 to 1.5 mm

How can a flat cornea down to even 31.00 diopters be measured? - CORRECT

ANSWER: With the use of a -1.00 trial lens

How does prism affect the positon of the lens on the eye? - CORRECT ANSWER: The

more prism the lower on eye

How many types of regular astigmatism exist? - CORRECT ANSWER: 5

How much of the information do most people remember? - CORRECT ANSWER: 25%

• / 2