Which lens specifications would best simulate a lid attachment rigid lens fitting for K's 42.00 @ 180/43.00 @ 90?

To determine which lens specifications would best simulate a lid attachment rigid lens fitting for corneal curvatures of 42.00 @ 180 and 43.00 @ 90, it is important to focus on the relationship between the lens parameters and the individual's keratometry readings.

In this case, a lens with a base curve of 41.50 and a power of -1.50 is appropriate because it closely matches the average of the two keratometric readings (average K = (42.00 + 43.00) / 2 = 42.50). The slightly flatter base curve allows for better alignment with the underlying corneal topography. This approach simulates the desired lid attachment feature, where the lens needs to maintain a stable relationship with the eyelid while minimizing movement during blinking.

The diameter of 9.5 is also relevant; while larger diameters tend to provide more stability with lid interaction, the chosen diameter should still facilitate adequate clearance for overall ocular health. In this case, the diameter fits within a range that is generally acceptable for rigid lenses that are designed to attach to the eyelids.

The other options, while presenting varying combinations of base curves, powers, and diameters, do not align as