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Good visual quality after LASIK seen with multiaspherical corneoscleral lens
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Corneoscleral contact lenses with multiaspheric geometry design provide good visual acuity and quality on irregular corneas after LASIK in myopic subjects, according to researchers.
Porcar and colleagues identified subjects with irregular corneas and visual problems from a database of patients evaluated for scleral contact lenses after they underwent LASIK surgery for correcting myopia.
Eighteen eyes in 18 patients 27 to 39 years old were studied. The time elapsed before fitting the lens was at least 6 months after surgery.
Patients were fitted with a corneoscleral contact lens with multiaspheric geometry design (Scleracon, Lenticon). The design has three curves: the base curve, intermediate curve and peripheral curve (or scleral curve).
Statistically significant differences were found before and after fitting a corneoscleral contact lens with multiaspheric geometry design in the visual acuity, ocular aberrations of second-order, coma, spherical and the total higher-order aberrations (HOA), researchers wrote.
The total HOAs decreased by about 78% to normal levels after fitting.
“We fitted a [corneoscleral contact lens with multiaspheric geometry design] on irregular corneas after LASIK surgery to achieve several advantages that this type of lens offers, such as excellent comfort, centration and stability in relation to corneal [gas-permeable] lenses,” researchers wrote.
These favorable findings may be due to better centration and stability of these lenses, along with their multiaspheric geometry design, according to researchers.
After 1 year of wear, no statistically significant differences were found in coma aberration, spherical aberration, total HOAs and visual acuity in regard to the initial fitting, the researchers concluded. – by Abigail Sutton
Disclosure: The researchers reported no relevant financial disclosures.
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