If a soft contact lens exhibits sluggish movement, what should be done?

In the scenario where a soft contact lens exhibits sluggish movement on the eye, the most appropriate action is to flatten the base curve. This adjustment can help reduce the overall fit of the lens on the cornea, allowing it to move more freely during blinking. When a contact lens fits too tightly or has a base curve that is too steep, it can limit the movement, leading to discomfort or inadequate tear exchange underneath the lens.

By flattening the base curve, the lens will align better with the natural curvature of the eye, enhancing movement and improving overall comfort and performance. This adjustment can facilitate more efficient tear exchange, which is vital for lens health and ocular comfort.

In contrast, increasing the edge thickness, thickening the lens material, or replacing the lens might not address the underlying issue of fit and could lead to other complications, such as discomfort or insufficient oxygen transmission to the cornea. Therefore, adjusting the base curve to achieve a more suitable fit is the best solution for resolving sluggish lens movement.