Scleral Lenses for Keratoconus found to be Safe and Effectiv
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This study affirms the long-term safety and efficacy of scleral contact lens use in patients with keratoconus. A Study was conducted to evaluate the safety and efficacy of contemporary scleral contact lenses in the visual rehabilitation of the keratoconic population.

A retrospective study of keratoconic subjects was conducted. Only eyes fit successfully with scleral contact lenses for more than 1 year were included. Exclusion criteria were prior corneal surgery, dystrophy, degeneration, and trauma.

Results:
--A total of 157 eyes of 86 subjects met the study criteria. The mean Keratoconus Severity Score at initial fitting was 3.6 ± 1.0. Lenses were gas-permeable and nonfenestrated, with a mean overall diameter of 15.8 ± 0.6 mm and 70.1% toric scleral periphery.

--Physiological adverse events occurred in 9.6% of eyes, including microbial keratitis (0.6%), phlyctenulosis (0.6%), corneal abrasion (1.3%), contact lens–induced acute red eye (1.3%), corneal infiltrative events (1.3%), pingueculitis (1.3%), and hydrops (3.2%).

--Lens-related adverse events were documented in 55.4% of eyes. Adverse events related to surface issues included poor wetting in 1.9%, handling in 3.8%, reservoir fogging in 7.0%, lens intolerance in 7.6%, deposit in 8.9%, and broken lenses in 26.1% of eyes.

--The most common management strategies involved refits (54.0% of interventions), patient reeducation (29.5%), medical treatment (5.5%), surgical referral (6.8%), adjustment to wear time (2.5%), surface treatment (1.2%), and lens replacement (0.6%).

--Best-corrected distance logMAR visual acuity improved significantly from a mean of 0.50 in spectacles to a mean of 0.08 in scleral lenses.

--During the study period, 14.6% of eyes lost best-corrected scleral lens visual acuity, all from keratoconus progression.

In conclusion, this research shows that scleral contact lenses are extremely healthy and effective in keratoconus patients.

Source: https://journals.lww.com/optvissci/Fulltext/2020/09000/Safety_and_Efficacy_of_Scleral_Lenses_for.14.aspx
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