ODP Contact Lens Pre-final Assessment 2 Latest
Update 2025-2026 Actual Exam 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 @.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
, 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%
Update 2025-2026 Actual Exam 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 @.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
, 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%
