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Corneal cross-linking does not affect scleral lens tolerance
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Corneal cross-linking was not found to be associated with tolerance of scleral lenses in patients who wore the lenses before and after the procedure, according to study recently published in Optometry and Vision Science.
Visser and colleagues conducted a study to evaluate the fitting and tolerance of scleral lenses both prior to and following corneal cross-linking (CXL) for progressive keratoconus.
They assessed 18 eyes of patients who had undergone CXL and worn scleral lenses beforehand. Specifically, they measured scleral lens specifications, scleral lens fit, scleral lens corrected distance visual acuity, subjective measures on visual analog scale questionnaires and wearing time.
Results showed no significant changes in scleral lens corrected distance visual acuity. Researchers also reported that subjective tolerance and wearing time remained stable.
"This study evaluated scleral lens tolerance and fitting before and 1 year after CXL in patients with progressive keratoconus," the authors wrote. "Our main finding was that CXL did not affect scleral lens tolerance."
They continued: "To our knowledge, this is the first study on scleral lens wear after CXL. In theory, scleral lens wear should not be affected by corneal curvature changes attributed to CXL, because scleral lenses vault the cornea and therefore do not make any mechanical contact with the cornea (in contrast with corneal contact lenses)."
Disclosure: The researchers report no relevant financial disclosures.
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