As plus power increases, how should the selection of a base curve generally change?

As plus power increases, how should the selection of a base curve generally change?

• A. Steepen
• B. Flatten
• C. Stay the same
• D. Be eliminated

Answer: (A)

As plus power increases in a lens prescription, it is generally appropriate to steepen the base curve. This adjustment is essential for several reasons. With higher plus power lenses, a steeper base curve helps to reduce the thickness and weight of the lens, particularly in the center, where plus lenses are typically thicker. A steeper base curve can also improve cosmetic appearance by minimizing edge thickness, which can be especially important for higher prescription values. Furthermore, a steeper base curve can enhance the optical performance of the lens by reducing distortion and providing a better field of vision. Overall, selecting a steeper base curve in response to increased plus power is a common practice among opticians and lens makers to optimize both the visual and physical characteristics of the glasses.

As plus power increases in a lens prescription, it is generally appropriate to steepen the base curve. This adjustment is essential for several reasons.

With higher plus power lenses, a steeper base curve helps to reduce the thickness and weight of the lens, particularly in the center, where plus lenses are typically thicker. A steeper base curve can also improve cosmetic appearance by minimizing edge thickness, which can be especially important for higher prescription values. Furthermore, a steeper base curve can enhance the optical performance of the lens by reducing distortion and providing a better field of vision.

Overall, selecting a steeper base curve in response to increased plus power is a common practice among opticians and lens makers to optimize both the visual and physical characteristics of the glasses.