Which of the following is a benefit of diagnostic GP fitting?

• A. Can evaluate fitting and residual astigmatism
• B. Requires longer chair time with no benefits
• C. Only uses one diagnostic lens
• D. Eliminates need for follow-up

Answer: (D)

Diagnostic GP fitting is all about testing how a gas-permeable lens sits on the eye to judge both fit and optics. The most valuable outcome is the ability to directly evaluate how well the lens fits and how much residual astigmatism remains once the lens is worn. This feedback lets you assess lens centration, movement with blink, edge alignment, and the corrective effect, so you can adjust base curve, diameter, or optic design before settling on a final lens. While the session may involve trying different lenses to compare fits, the goal isn’t to waste chair time but to gain concrete information that guides an effective, comfortable fit. It doesn’t eliminate the need for follow-up, since final verification and any necessary refinements are usually completed after the diagnostic phase.