Final answer:
The appropriate edge lift in Ortho-K is 150 to 200 microns, which is key for ensuring proper tear circulation and effective vision correction. Correct fitting is crucial to avoid issues and ensure lens comfort.
Step-by-step explanation:
The appropriate edge lift in Orthokeratology (Ortho-K) is typically 150 to 200 microns. Edge lift is a crucial parameter in Ortho-K lens design; it ensures that proper tear circulation occurs beneath the lens, which is essential for corneal health and optimal vision correction. An edge lift that is too high or too low can lead to issues with lens fitting, comfort, and effectiveness of the treatment.
The figure mentioned (Figure 13.1) probably illustrates the desired lens profile in relation to the edge lift amongst other Ortho-K lens parameters. However, without specific details of Eq. 13.3 or Figure 13.1 contained within the original textbook or resource, precise guidance cannot be provided. When considering such exact measurements, think energetics and depth as well as how these measurements interact with the physiology of the eye. To assess the transparency of an answer, it is important to ensure clarity and ascertain that it aligns well with well-established standards in Ortho-K lens fittings.