As minus power increases, what adjustment should be made to the base curve?

As minus power in a lens increases, it is essential to understand the relationship between the lens power and the base curve. The base curve is the curvature of the front surface of a lens, and it plays a significant role in the overall optical performance and aesthetics of the lens.

When the minus power increases, the lens becomes thicker at the center and thinner at the edges. To maintain proper visual function and reduce distortion, the base curve must be adjusted accordingly. Specifically, to manage the increased minus power, the base curve should be flattened. Flattening the base curve helps reduce the thickness of the lens at the center and mitigates the potential for optical aberrations and discomfort caused by a thicker lens.

Thus, the adjustment of flattening the base curve as the minus power increases is crucial for achieving optimal vision, comfort, and lens aesthetics. This adjustment appropriately balances the optical properties of the lens and is an essential practice in optics and eyewear design.