What symptom might indicate a fitting issue with a contact lens?

Frequent lens dislodgement is a strong indicator of a fitting issue with a contact lens. This symptom suggests that the lens may not be properly aligned to the contours of the eye or that it is the wrong size for the wearer's cornea. When a contact lens fits correctly, it should maintain its position on the eye despite blinking and eye movement. If a lens consistently moves out of position or is prone to dislodgement, it can be uncomfortable and impede vision.

In contrast, clear vision, normal tear film, and good visual acuity do not point to fitting problems. Clear vision and good visual acuity suggest that the lens is effectively correcting vision but do not provide information about the fit. Similarly, a normal tear film indicates that the eye is well-lubricated and functioning properly, which would typically accompany a well-fitted lens.