What is a downside of diagnostic GP fitting?

• A. Patient won't leave the office with a lens
• B. Always ensures immediate perfect fit
• C. No need for follow-up
• D. Lenses are free

Answer: (C)

Diagnostic GP fitting relies on trial lenses to judge how well a lens matches the cornea and tear film, but the process almost always needs follow-up to confirm and refine the result. The initial assessment can’t guarantee a stable, comfortable, and healthy fit over real wear, so clinicians schedule additional visits to check lens movement and centration, edge alignment, and the fluorescein pattern. These follow-ups also let you monitor for any corneal or lid reactions and to fine-tune parameters like diameter, base curve, and lens power. In short, the real constraint is that you typically can’t lock in a final fit with one appointment; ongoing evaluation is essential to ensure safety, comfort, and good vision.