What characteristic is essential for therapeutic soft lenses?

Therapeutic soft lenses are specifically designed to provide comfort and support for the healing of the ocular surface, which makes minimal movement a crucial characteristic. These lenses are often used in clinical situations where the cornea needs to be protected or healed, such as after surgical procedures, in the presence of abrasions, or with conditions like dry eye or keratitis.

Minimal movement helps ensure that the lens remains stable on the eye, providing consistent coverage and protection over the corneal surface. Stability reduces irritation and allows for the delivery of medications to the eye if the lens is used in therapeutic applications. This close fitting and limited movement also promote better tear film stabilization underneath the lens, contributing to overall comfort and healing.

In contrast, significant movement may lead to discomfort, disruption of the healing process, or inadequate protection of the ocular surface—making minimal movement essential for the optimum performance of therapeutic soft lenses.