What set of lens specifications would best simulate intrapalpebral GP fitting with K's of 42.00 @ 180/43.00 @ 90 and an RX of -2.00-1.00X 180?

To determine which set of lens specifications would best simulate intrapalpebral GP fitting based on the provided keratometry readings and prescription, we need to consider several factors: the base curve (BC), lens power, and overall lens fit in the eye.

The provided keratometry values suggest that the cornea has a somewhat astigmatic shape. The flatter meridian is at 42.00 diopters (D) and the steeper meridian is at 43.00 D. When fitting rigid gas permeable (GP) lenses, the base curve is often selected to align closely with the flatter of these keratometry readings to help achieve a good fit and prevent excessive bearing on the cornea.

Among the options, the choice of 42.50 D for the base curve is a reasonable adjustment because it is aligned closely with the flatter K reading of 42.00 D while providing a slight increase in curvature that can improve centration and stability of the lens.

In terms of power, the lens power is adjusted to correspond with the patient’s prescription of -2.00-1.00x180. For a GP lens fitting, the adjustments must ensure proper vision correction while also maintaining comfort. The -2.50