Which of the following is a stated benefit of empirical GP fitting?

• A. Requires more chair time
• B. Easier, less chair time, effective way to obtain maximum performance and fit, minimizes risk of transfer of diagnostic lenses, allows topography to assist in lens design
• C. Precludes use of topography
• D. Lowers patient comfort

Answer: (B)

Empirical GP fitting uses data and real-world outcomes to choose a lens design that delivers the best fit and performance with minimal trialing. Because the process leverages existing measurements and population data, you can predict a good match more quickly, so chair time is reduced and you’re less often cycling through multiple diagnostic lenses. This approach also minimizes handling and switching of diagnostic lenses, lowering the risk associated with repeatedly transferring lenses for trial and adjustment.

Topography adds value here by providing detailed corneal shape information that feeds into the empirical dataset, guiding choices like base curve, diameter, and peripheral geometry to optimize alignment with the cornea. In short, this method is designed to be efficient, effective, and data-informed, with topography helping tailor the design to the individual eye. The other statements conflict with how empirical fitting is intended to work, such as requiring more chair time, precluding topography, or reducing comfort.