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Diagnostic bitoric rigid gas permeable contact lenses
1Department of Ophthalmology, Fukushima Medical University, School of Medicine, Fukushima-ken, Japan.
Summary
Using a diagnostic bitoric rigid gas permeable (RGP) lens simplifies the fitting process for astigmatic corneas. This method requires fewer parameter adjustments compared to using a standard spherical lens for RGP lens prescription.
Area of Science:
- Ophthalmology
- Optometry
- Contact Lens Technology
Background:
- Fitting bitoric rigid gas permeable (RGP) contact lenses for astigmatic corneas can be complex.
- Current methods may involve multiple trial lenses and adjustments.
Purpose of the Study:
- To evaluate a simplified approach for fitting bitoric RGP lenses.
- To determine if a specific diagnostic lens type improves fitting efficiency.
Main Methods:
- A randomized comparison of two diagnostic lens types for prescribing bitoric RGP lenses.
- One group used a diagnostic polymethylmethacrylate (PMMA) spherical lens.
- The other group used a diagnostic RGP bitoric lens.
Main Results:
- Prescribing bitoric RGP lenses with a diagnostic bitoric lens resulted in fewer necessary parameter changes.
- The diagnostic RGP bitoric lens approach was more efficient than using a diagnostic PMMA spherical lens.
Conclusions:
- The diagnostic RGP bitoric lens significantly simplifies the prescription process for bitoric RGP lenses.
- This diagnostic tool is highly beneficial for fitting patients with astigmatic corneas.