Which contact lens parameter is associated with lens bends and the "ski effect"?

The correct response focuses on peripheral curves being associated with lens bends and the "ski effect." When contact lenses are fitted, the design of the lens, particularly in the periphery, can influence how the lens interacts with the eye and how it performs during wear.

The ski effect refers to the phenomenon where the lens tends to move in a way that mimics the bending of a ski, especially in relation to the curvature of the cornea as well as how the lens aligns with the eye during blinking. The peripheral curves are crucial as they help manage the stability of the lens on the eye while also allowing for the appropriate tear exchange under the lens. The curvature and design of these peripheral areas can cause the lens to tilt or bend in particular ways, thereby impacting comfort and visual performance.

Understanding the importance of the peripheral curves is essential in lens fitting, as they help correct for variations in corneal shape and maintain lens stability, which is vital for clear vision and minimizing lens movement. This knowledge allows practitioners to better accommodate individual patient needs in their contact lens fittings.