Related Experiment Videos
Computerized videokeratoscopy contact lens software for RGP fitting in a bilateral postkeratoplasty patient: a
1Department of Ophthalmology, Case Western Reserve University, University Hospitals of Cleveland, OH 44106.
Summary
Computerized videokeratoscopy with updated software enables interactive rigid gas permeable (RGP) lens fitting simulations. This technology successfully refitted a complex patient without trial lenses, achieving optimal fit and visual acuity.
Area of Science:
- Ophthalmology
- Optometry
- Biomedical Engineering
Background:
- Advanced computerized videokeratoscopy systems offer interactive simulation for rigid gas permeable (RGP) lens fitting.
- Updated software programs facilitate the evaluation of fluorescein patterns in RGP lens fitting.
Observation:
- A symptomatic patient with bilateral post-penetrating keratoplasty underwent refitting using Computed Anatomy's Topographic Modeling System-1 (TMS-1) Custom Design Contact Lens Program.
- No conventional trial lenses were employed during the fitting process.
Findings:
- Optimal fluorescein patterns on the TMS-1 unit guided the selection of base curve, optic zone size, and edge lift for each eye.
- Dispensed RGP lenses resulted in a clinically acceptable fit, good patient comfort, and maximal visual acuity without the need for adjustments.
Implications:
- Corneal videokeratoscopy can be effectively utilized for titrating RGP lens fits, even in cases of irregular corneas.
- This simulation-based approach offers a viable alternative to traditional trial lens fitting for complex RGP lens wearers.