ABSTRACT
Introduction: Primary ectatic corneal diseases usually require rigid gas-permeable (RGP) corneal contact lens wear for visual rehabilitation. As the disease progresses, it becomes increasingly difficult to fit these lenses. RGP scleral contact lenses now provide another treatment option before resorting to surgery.
Clinical Picture: Two patients with pellucid marginal degeneration and one with advanced keratoconus had failed treatment with conventional lenses. Treatment: They were fitted with RGP scleral lenses. Outcome: Good vision was obtained together with satisfactory fit and comfort. Conclusion: RGP scleral lenses are a viable alternative to surgery in the visual rehabilitation of patients with advanced ectatic corneal disorders.Advanced primary corneal ectasia presents a difficult problem in terms of visual rehabilitation. Soft contact lenses do not address the astigmatic aberrations in these conditions and conventional rigid gas-permeable (RGP) corneal contact lenses though useful in less severe disease, are poorly tolerated by those with progressively worsening keratoconus and peripheral ectasia such as pellucid marginal degeneration.
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