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Hard contact lenses. Medical aspects
Transactions of the Ophthalmological Societies of the United Kingdom
|April 1, 1977
Summary
Rigid gas permeable contact lenses, including corneal and scleral types, remain valuable for correcting vision problems like high myopia and astigmatism. Their reliable properties ensure continued use in optometry for improved visual acuity and field of vision.
Area of Science:
- Ophthalmology and Optometry
- Corneal and External Eye Diseases
- Refractive Error Correction
Background:
- Hard contact lenses, specifically corneal and scleral designs, are established methods for vision correction.
- These lenses have historically addressed significant refractive errors and visual impairments.
Purpose of the Study:
- To evaluate the continued utility and benefits of hard contact lenses in modern optometric practice.
- To highlight the specific conditions where hard lenses provide superior visual outcomes.
Main Methods:
- Review of existing literature and clinical data on hard contact lens efficacy.
- Analysis of visual acuity and field of vision data in patients fitted with corneal and scleral lenses.
Main Results:
- Hard lenses demonstrate significant advantages in visual acuity and visual field.
- These benefits are particularly pronounced in cases of high myopia, irregular astigmatism, and aphakia.
- The reliable physical and chemical properties of hard lenses contribute to their sustained effectiveness.
Conclusions:
- Corneal and scleral hard lenses remain essential tools for correcting complex ametropia.
- Their proven efficacy in challenging visual conditions ensures their ongoing relevance in eye care.
- The inherent stability and performance characteristics of these lenses support their continued application.