What effect does steepening the posterior curve of a contact lens have?

Steepening the posterior curve of a contact lens results in a tighter fit on the cornea. This occurs because a steeper curve mimics the natural contour of the cornea more closely; therefore, it creates a better alignment with the shape of the eye. When the lens becomes steeper, it decreases the amount of space between the lens and the corneal surface, leading to a more stable position of the lens during blinking and movement.

When the fit is tighter, it can also enhance the comfort and performance of the lens, as the lens is less likely to move around excessively, which can reduce irritation and improve visual acuity. A properly fitting lens is critical for optimal oxygen permeability and tear exchange as well, promoting eye health and comfort.

The other options relate to different aspects of lens design or performance, which do not directly pertain to the effect of steepening the posterior curve, making them less relevant in the context of this question.