A direct consequence of GP lenses requiring custom design is:

A direct consequence of GP lenses requiring custom design is:

• A. Reduced fitting time
• B. Increased fitting time
• C. No difference in fitting time
• D. Immediate fit during trial

Answer: (B)

Because gas-permeable lenses are designed to match each eye’s unique corneal shape, the fitting process is inherently tailored. That means selecting and refining parameters like base curve, lens diameter, edge profile, and sometimes sagittal height or scleral vault for each patient. The result is a process that involves evaluating diagnostic lenses, assessing movement and centration, interpreting fluorescein patterns, and making iterative adjustments across multiple trial fits. This customization adds design and testing steps, which makes fitting time longer than with non-customized options. An immediate fit during a single trial is unlikely because refining the fit for comfort, vision, and health typically requires several evaluations and tweaks.

Because gas-permeable lenses are designed to match each eye’s unique corneal shape, the fitting process is inherently tailored. That means selecting and refining parameters like base curve, lens diameter, edge profile, and sometimes sagittal height or scleral vault for each patient. The result is a process that involves evaluating diagnostic lenses, assessing movement and centration, interpreting fluorescein patterns, and making iterative adjustments across multiple trial fits. This customization adds design and testing steps, which makes fitting time longer than with non-customized options. An immediate fit during a single trial is unlikely because refining the fit for comfort, vision, and health typically requires several evaluations and tweaks.