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Power changes converting aphakics from hard contact lenses to the B&L SOFLENS
Journal of the American Optometric Association
|November 1, 1975
Summary
Refitting aphakic eyes with soft contact lenses showed varied power needs, differing from predictions. This study highlights the importance of individual assessment over standard charts for soft lens prescriptions.
Area of Science:
- Ophthalmology
- Optometry
- Contact Lens Technology
Background:
- Aphakia, the absence of the eye's natural lens, often requires optical correction.
- Hard contact lenses were previously used for aphakic correction.
- Soft contact lenses offer an alternative for aphakic correction.
Purpose of the Study:
- To evaluate the refractive power requirements when refitting aphakic eyes from hard to soft contact lenses.
- To compare the prescribed soft lens power with the previous hard lens power and expected values.
Main Methods:
- 20 eyes of patients with previous hard lens aphakic correction were refitted with Bausch & Lomb SOFLENS.
- Lens power was assessed and compared between the hard and soft contact lens prescriptions.
Main Results:
- 10 patients needed less soft lens power than their previous hard lens.
- 5 patients required the same power.
- 5 patients needed more soft lens power than their previous hard lens.
Conclusions:
- Prescribed soft lens powers deviated from the predictions of the Bausch & Lomb Back-Vertex Power Chart.
- Individualized assessment is crucial for accurate soft contact lens power in aphakic eyes.
- Standard power charts may not be reliable for this specific refitting scenario.