When assessing a lens fit, which statement reflects an appropriate movement expectation?

When assessing a lens fit, which statement reflects an appropriate movement expectation?

• A. Complete lack of movement
• B. Adequate lens movement that is neither excessive nor insufficient.
• C. Movement only during sleep
• D. Movement caused by blinking forcefully

Answer: (B)

A proper soft lens fit allows just enough movement with each blink. This movement is important because it helps tear exchange under the lens and lets the lens settle smoothly on the eye. If there’s no movement at all, the lens is likely too tight, which can cause discomfort, decreased tear exchange, and potential hypoxia. If movement is excessive or only occurs under unusual conditions like sleep or with forceful blinking, the lens isn’t stabilized well, which can lead to irritation, decentration, or loss. Normal, comfortable wear shows gentle, regular movement with blinking and a quick return to center. So the statement describing movement as adequate—neither excessive nor insufficient—best reflects an appropriate lens fit.