Waleed S Al-Tuwairqi1, Uchechukwu L Osuagwu2, Haya Razzouk1, Ahmed AlHarbi3, Kelechi C Ogbuehi4. 1. Elite Medical and Surgical Center, P.O Box 68333, Riyadh, 11527, Saudi Arabia. 2. Department of Optometry and Vision Sciences, Faculty of Health, Institute of Health and Biomedical Innovation, Q Block, 60 Musk Avenue Kelvin Grove, Brisbane, QLD, 4059, Australia. uchechukwulevi.osuagwu@hdr.qut.edu.au. 3. Department of Optometry and Vision Sciences, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh, 11433, Saudi Arabia. 4. Department of Medicine, Dunedin School of Medicine, University of Otago, PO Box 913, Dunedin, 9054, New Zealand.
Abstract
PURPOSE: To compare the outcome measures following implantation of two types of ICRS. METHODS:Forty-four eyes of keratoconic patients (aged 18-50 years) were randomly assigned to femtosecond laser-assisted Keraring ICRS (Group A) or MyoRing (Group B) implantation. Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction, keratometry (K), and aberrations were compared preoperatively, at 3 and 6 months postoperatively. A survey was conducted to assess patient's satisfaction, 6 months postoperatively. RESULTS: In Groups A (n = 26) and B (n = 18), UDVA was increased (P < 0.05), but CDVA increased only in Group A (P < 0.05) 6 months postoperatively. The mean K was reduced by 4.55 D (P < 0.0001) in Group A and 6.51 D (P < 0.001) in Group B. Six months postoperatively, the mean refraction spherical equivalent (MRSE) decreased by 2.90 and 3.60 D in Groups A and B, respectively (P < 0.0001). Between groups, coma was more reduced (P = 0.035) in Group B than A, 6 months postoperatively. On motivation for surgery, 88.9% of patients' ranked "desire to improve unaided vision" and "relief from glasses" (77%) topmost. Seventy-seven (77%) of Group A and 89% of Group B patients were satisfied with their unaided vision at the final visit, after 6 months. CONCLUSIONS: KeraRing (A) and MyoRing (B) corneal implants both performed well in improving vision and stabilising the cornea. Implantation of the MyoRing caused greater reduction in coma and better patient satisfaction, but CDVA improved only in the Keraring group, at the final visit.
RCT Entities:
PURPOSE: To compare the outcome measures following implantation of two types of ICRS. METHODS: Forty-four eyes of keratoconic patients (aged 18-50 years) were randomly assigned to femtosecond laser-assisted Keraring ICRS (Group A) or MyoRing (Group B) implantation. Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction, keratometry (K), and aberrations were compared preoperatively, at 3 and 6 months postoperatively. A survey was conducted to assess patient's satisfaction, 6 months postoperatively. RESULTS: In Groups A (n = 26) and B (n = 18), UDVA was increased (P < 0.05), but CDVA increased only in Group A (P < 0.05) 6 months postoperatively. The mean K was reduced by 4.55 D (P < 0.0001) in Group A and 6.51 D (P < 0.001) in Group B. Six months postoperatively, the mean refraction spherical equivalent (MRSE) decreased by 2.90 and 3.60 D in Groups A and B, respectively (P < 0.0001). Between groups, coma was more reduced (P = 0.035) in Group B than A, 6 months postoperatively. On motivation for surgery, 88.9% of patients' ranked "desire to improve unaided vision" and "relief from glasses" (77%) topmost. Seventy-seven (77%) of Group A and 89% of Group B patients were satisfied with their unaided vision at the final visit, after 6 months. CONCLUSIONS: KeraRing (A) and MyoRing (B) corneal implants both performed well in improving vision and stabilising the cornea. Implantation of the MyoRing caused greater reduction in coma and better patient satisfaction, but CDVA improved only in the Keraring group, at the final visit.
Entities:
Keywords:
Femtosecond laser; Intracorneal ring segment; Keraring; Keratoconus; MyoRing; Satisfaction
Authors: Imola Ratkay-Traub; Istvan E Ferincz; Tibor Juhasz; Ron M Kurtz; Ronald R Krueger Journal: J Refract Surg Date: 2003 Mar-Apr Impact factor: 3.573