2026/2027 NCLE Practice Exam Questions and

Answers Already Passed (Graded A+)

base curve -Answer refers to the radius of curvature of the central posterior surface of the

lens. It may be expressed in diopters of surface power (D) or in millimeters (mm) of radius or

curvature.

optical zone -Answer the chord diameter over which the base curve extends on the posterior

surface of the contact lens, described in millimeters

secondary or intermediate curves -Answer lies between the base curve an...
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