A retrospective analysis of vision correction and safety in keratoconus patients wearing Toris K soft contact lenses

Abstract

The purpose of this study was to investigate the efficacy and safety of the Toris K silicone hydrogel contact lens (SwissLens; Prilly, Switzerland) in keratoconus patients. A database with information on 50 keratoconus patients (64 eyes) fitted with Toris K soft contact lenses over a 2-year period was retrospectively reviewed. Demographic data, prefitting refraction, the reason for choosing the Toris K soft contact lens, uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), best-corrected visual acuity with a rigid gas permeable lens (BCVA RGP), best-corrected visual acuity with the Toris K lens (BCVA Toris K), and complications were evaluated. The mean age ± standard deviation at the time of fitting was 27.92 ± 9.86 years. The mean spherical refractive power was -4.62 ± 6.53 dioptres, and the mean cylinder was -3.78 ± 2.43 dioptres. The most common reason for using Toris K soft contact lenses was an inability to fit the patient with a RGP contact lens. There was a statistically significant difference between UCVA and BCVA Toris K (p = 0.0001), as well as between BSCVA and BCVA Toris K (p = 0.0001). However, there was no statistically significant difference between BCVA Toris K and BCVA RGP (p = 0.20). Superficial punctate keratitis and giant papillary conjunctivitis were the most common complications. The Toris K contact lens is a viable alternative for the optical management of all grades of keratoconus. The Toris K soft contact lens is a promising alternative for the visual rehabilitation of keratoconus patients who cannot tolerate RGP lenses or achieve a good fit.

Nonsurgical Procedures for Keratoconus Management

“…Early in the disease, SCLs with toric design may be adequate to correct myopia and regular astigmatism. SCLs and toric SCLs may be indicated in early KC, decentered KC, and RGPCL intolerance [ 13 ]. However, RGPCLs provided superior visual performances than SCLs.…”

“…On the other hand, there is no improvement in VA when toric K lenses are compared with RGPCLs [ 13 , 17 ], and even the quality of life, measured with the CL impact quality of life (CLIQ), is similar [ 18 ]. It is expected that SCLs improve visual function in KC eyes [ 16 , 19 ], but the challenge is to achieve visual results similar to those provided by RGPCLs.…”

The effect of soft contact lens thickness in visual function after intracorneal ring segments surgery

“…Furthermore, high thickness SCL is an alternative option in order to reestablish the symmetry of the optical anterior segment and decrease the HOA. In addition, high thickness SCL improves comfort during its wear and quality of life on irregular corneas [20][21][22][23][24][25][26][27][28][29]. Fernández-Velázquez and Fernández-Fidalgo [29] demonstrated an increase in high-contrast CDVA with high thickness SCL after ICRS implantation, these values being close to normative data.…”

“…In recent years, SCL fitting has proved to be an alternative to RGP lenses on irregular corneas, including ICRS implanted, in order to improve optical and visual quality [17][18][19][20][21][22][23][24][25][26][27][28][29]. SCL are especially recommended in patients who want to increase their comfort, assuming a reduction of visual function compared to RGP wearers [16].…”

Keratokonus: heutige Therapieoptionen

“…Diese können äquivalent zu den formstabilen Kontaktlinsen nach individuellen Parametern hergestellt werden [34]. Untersuchungen dazu zeigen, dass diese Linsen einen guten Visus sowie angenehmen Tragekomfort bewirken [34,35].…”