Final answer:
The two main categories of fitting techniques for Ortho-K are reverse geometry fitting and alignment-based fitting.
Step-by-step explanation:
The two main categories of fitting techniques for Ortho-K are reverse geometry fitting and alignment-based fitting. The two primary fitting techniques for Orthokeratology are reverse geometry fitting and alignment-based fitting, which are used to reshape the cornea and provide a comfortable lens fit respectively.
The two main categories of fitting techniques for Orthokeratology (Ortho-K) are c) Reverse geometry fitting and alignment-based fitting. Reverse geometry fitting is designed for reshaping the cornea to correct myopia by using lenses with a secondary curve flatter than the central base curve to create a space under the lens for the corneal tissue to be redistributed. Alignment-based fitting involves fitting the lens so that it aligns closely with the peripheral cornea and sclera, which can provide a more comfortable fit and is often used for patients with irregular corneas.