In a properly fitted GP lens, how is the lid relationship described?

• A. Lid attached or interpalpebral
• B. Floating above the lid
• C. Lid tightly occluding
• D. Not affected by the lid

Answer: (A)

In gas-permeable lens fitting, how the eyelids interact with the lens during blinking is crucial for stability and movement. A properly fitted GP lens is lid-attached or interpalpebral, meaning the lens sits in the interpalpebral zone and is engaged by the upper and lower lids as you blink. This lid–lens relationship helps the lens move gently with each blink, maintains centration, and aids tear film exchange so the lens stays comfortable and clean. If the lens floated high above the lid margins, movement would be insufficient and blinking wouldn’t properly wipe the lens. If the lids pressed tightly and occluded the lens, comfort and tear exchange would be compromised. If the lens weren’t affected by the lid, tear dynamics and lid-driven movement essential for a stable fit would be lost.