Question

What two types of Ortho K lenses use diagnostic fitting?

a) Reverse geometry lenses and alignment lenses
b) Orthokeratology and myopia control lenses
c) Corneal reshaping lenses and hybrid lenses
d) Paragon CRT and Euclid Emerald lenses

Answer 1

The two types of Ortho K lenses that use diagnostic fitting are corneal reshaping lenses and hybrid lenses.

Step-by-step explanation:

The correct answer is c) Corneal reshaping lenses and hybrid lenses.

Orthokeratology (Ortho K) lenses and myopia control lenses are both types of corneal reshaping lenses. These lenses are designed to reshape the cornea while the patient sleeps, temporarily correcting refractive errors like myopia and astigmatism.

On the other hand, reverse geometry lenses and alignment lenses are specific designs within the Ortho K lens category and are not diagnostic fitting techniques.