Final answer:
Clinical management of RGP flexure can be eliminated by reducing sagittal vaulting, increasing center thickness, and choosing a lower DK material. The correct answer is d. all the above.
Step-by-step explanation:
Clinical management of RGP flexure can be eliminated by reducing sagittal vaulting, increasing center thickness, and choosing a lower DK material. Reducing sagittal vaulting: RGP flexure occurs when the cornea flattens and the lens steepens during blinking, causing the contact lens to flex and move on the cornea. By reducing sagittal vaulting, which is the curvature or steepness of the lens, the contact lens can fit more securely on the cornea and minimize flexure.
Increasing center thickness: The center thickness of a contact lens affects its rigidity. A thicker lens is typically more rigid and less prone to flexure. By increasing the center thickness of the lens, the flexure can be reduced. Choosing a lower DK material: DK, or oxygen permeability, is an important property of contact lens materials. Higher DK materials allow more oxygen to reach the cornea, reducing the risk of complications. By selecting a lower DK material, the lens can have a higher rigidity, helping to eliminate flexure.
In conclusion, all the options mentioned above can play a role in eliminating the clinical management of RGP flexure. By reducing sagittal vaulting, increasing center thickness, and choosing a lower DK material, the contact lens can fit better on the cornea, minimizing flexure and improving overall comfort and vision for the wearer. The correct answer is d. all the above.