Fluoroperm extended wear RGP contact lenses: II. Front toric fitting

Seventeen eyes (10 patients) were fit with front toric rigid gas permeable (RGP) Fluoroperm lenses as part of an extended wear study. These 17 eyes required 40 fittings (an average of 2.35 fittings per eye); only six eyes were fit successfully the first time. What occasioned the large number of fittings was unacceptable visual acuity due to incorrect lens axis. Most fittings had been done with a polymethylmethacrylate (PMMA) fitting set; and it became obvious that the final Fluoroperm lenses rotated differently from the PMMA diagnostic lenses. Ultimately, the use of a Fluoroperm prism-ballasted fitting set resulted in 16 of 17 eyes (94%) seeing well with a front toric lens. We advise that, for front toric fittings, the diagnostic lens be of the same material as the final lens.