ABSTRACT
PURPOSE: To compare the outcomes, safety, efficacy, and predictability of microkeratome laser in situ keratomileusis (LASIK) 24 h and one month or more after removing soft contact lenses. SETTING: ULTRALASIK Eye Center, Dubai, United Arab Emirates. METHODS: The patients were divided based on the time of discontinuation of the soft contact lenses before LASIK (Group 1 at 24 h and Group 2 at one month or longer), and the two groups were well matched. Schirmer's testing, tear break-up time, corrected distance visual acuity, uncorrected distance visual acuity, manifest refraction spherical equivalent, and infection rate were evaluated preoperatively and at one week, one month, and six months after treatment. RESULTS: Group 1 (G1) comprised 1025 eyes, and group 2 (G2) had 1052 eyes. The groups were comparable preoperatively. The overall-mentioned outcomes were comparable between groups with uncorrected distance visual acuity of - 0.084 ± 0.12 logMAR in G1 and - 0.078 ± 0.17 logMAR in the G2 at 6 months (P = 0.322). Tear break-up time as well as Schirmer's testing results was also comparable with no evidence of increased risk of dry eyes or non-inflammatory complications in any of the groups on follow-up visits at 1 week (P = 0.421), 1 month (P = 0.101), and 6 months (P = 0.399) postoperatively. Finally, no infectious complications were recorded in either of the groups. CONCLUSION: With the absence of corneal warpage, no statistical or clinical difference in microkeratome LASIK outcomes and safety was spotted between the groups despite the difference in SCL discontinuation time before the procedure.
Subject(s)
Keratomileusis, Laser In Situ , Myopia , Humans , Keratomileusis, Laser In Situ/methods , Myopia/surgery , Myopia/etiology , Visual Acuity , Refraction, Ocular , Cornea/surgery , Treatment Outcome , Lasers, Excimer/therapeutic useSubject(s)
COVID-19/epidemiology , Keratomileusis, Laser In Situ/methods , Myopia/surgery , SARS-CoV-2 , Academies and Institutes/standards , COVID-19/transmission , Elective Surgical Procedures , Follow-Up Studies , Humans , Infection Control/methods , Infectious Disease Transmission, Patient-to-Professional/prevention & control , N95 Respirators , Ophthalmology/organization & administration , Physical Distancing , Practice Guidelines as Topic/standards , Prospective StudiesABSTRACT
PURPOSE: To assess the effectiveness and safety of 2 types of 6.0 mm intrastromal corneal ring segments (ICRS) in patients with mild to severe keratoconus. SETTING: Lebanese American University, Beirut, Lebanon. DESIGN: Retrospective comparative case series. METHODS: Eyes had implantation of Intacs SK ICRS (Group 1) or Keraring SI6 ICRS (Group 2). Visual acuity (logMAR), refraction, keratometry, and higher-order aberrations were compared 6 months and 1 year postoperatively. RESULTS: Group 1 comprised 66 eyes and Group 2, 107 eyes. The groups were comparable preoperatively. One-year postoperatively, the mean uncorrected distance visual acuity improved by 0.62 logMAR ± 0.19 (SD) in Group 1 and by 0.67 ± 0.17 logMAR in Group 2 (P=.211). The mean corrected distance visual acuity improved by 0.12 ± 0.11 logMAR and by 0.08 ± 0.13, respectively (P=.301). The spherical equivalent decreased by a mean of 2.80 ± 2.87 D and 2.65 ± 3.00 D, respectively (P=.572). Keratometry (K) flat and K steep decreased by a mean of 1.51 ± 1.57 D and 2.24 ± 1.61 D, respectively, in Group 1 and by 1.10 ± 2.00 D and 1.44 ± 1.64 D, respectively, in Group 2 (P=.667 and P=.184, respectively). Primary coma root mean square decreased by a mean of 1.09 ± 0.66 µm in Group 1 and 0.99 ± 0.72 µm in Group 2 (P=.716). CONCLUSION: Both ICRS models significantly improved visual function in patients with keratoconus, with comparable postoperative profiles and no major complications. FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.
