For a patient with K's of 44.00 @ 180 and 46.50 @ 90, which special GP lens design would be most beneficial?

In the context of designing a GP lens for a patient with a corneal astigmatism represented by keratometry readings of 44.00 D @ 180 and 46.50 D @ 90, the hyperflange design would be particularly advantageous.

A hyperflange lens features a specific edge design that helps to improve the fit and stability of the lens on a cornea with notable astigmatism. This design is characterized by an extended edge that allows the lens to have enhanced peripheral support, which is crucial for maintaining proper alignment with the irregularities of the cornea.

Given that the curvature difference between the two meridians (180° and 90°) is significant, a hyperflange lens can help provide a better fit, ensuring that the lens remains stable during blinks and eye movements. This stability is particularly beneficial for patients who may have higher astigmatism or irregular corneas, as it minimizes the lens rotation and optimizes visual acuity.

In contrast, while options like aspheric, scleral, and toric designs might also offer certain benefits, they might not adequately address the specific needs presented by the keratometry values in this scenario as effectively as a hyperflange design