What is the purpose of the push-up test for contact lenses?

The push-up test is specifically designed to assess lens movement on the eye. During this test, the practitioner observes how the contact lens interacts with the ocular surface and evaluates whether it maintains appropriate stability and movement during blinking. Proper lens movement is crucial for comfort and ensuring that the lens does not become dislodged.

When performing the test, the practitioner gently pushes the lower lid upwards or applies a slight force to the lens to observe how it responds. An ideal contact lens will exhibit a certain amount of movement—this indicates that the lens is fitting well and not overly tight or loose.

While other tests and assessments exist for determining lens opacity, confirming fitting positions, and checking refractive errors, the push-up test is uniquely focused on understanding the dynamics of lens movement during daily wear, making it a vital part of the fitting and evaluation process for contact lenses.