Continuous intracorneal ring implantation for keratoconus using a femtosecond laser

M Jabbarvand, A SalamatRad, H Hashemian… - Journal of Cataract & …, 2013 - Elsevier
M Jabbarvand, A SalamatRad, H Hashemian, M Mazloumi, M Khodaparast
Journal of Cataract & Refractive Surgery, 2013Elsevier
PURPOSE: To assess the clinical outcomes after continuous intracorneal ring (ICR)
implantation for the management of keratoconus using femtosecond laser technology.
SETTING: Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
DESIGN: Prospective nonrandomized consecutive case series. METHODS: All patients
presented with reduced visual acuity, contact lens intolerance, and a central corneal
thickness of more than 360 μm. A Myoring ICR was inserted in an intrastromal pocket …
PURPOSE: To assess the clinical outcomes after continuous intracorneal ring (ICR) implantation for the management of keratoconus using femtosecond laser technology. SETTING: Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran. DESIGN: Prospective nonrandomized consecutive case series. METHODS: All patients presented with reduced visual acuity, contact lens intolerance, and a central corneal thickness of more than 360 μm. A Myoring ICR was inserted in an intrastromal pocket created by a femtosecond laser. The visual, refractive, aberrometric, and corneal biomechanical outcomes were measured preoperatively as well as 1, 3, and 6 months and 1 year postoperatively. RESULTS: The study comprised 98 keratoconic eyes of 98 patients with a mean age of 30.7 years ± 9.01 (SD). Fifteen eyes (15.3%) had grade I keratoconus, 37 eyes (37.7%) had grade II keratoconus, 24 eyes (24.5%) had grade III keratoconus, and 22 eyes (22.4%) had grade IV keratoconus. The uncorrected and corrected distance visual acuities and spherical and cylindrical errors improved 1 month after surgery (P<.001); however, no changes were detected thereafter (P>.05). The mean keratometry and corneal astigmatism decreased 1 month after surgery (P<.001); however, no significant change was observed at the 3-month or 1-year visits compared with the 1-month values (P>.05). Primary coma decreased significantly (P=.03), and spherical aberrations increased significantly (P<.001) postoperatively. CONCLUSION: Continuous ICR implantation in keratoconus appears to be an acceptable substitute for keratoplasty in advanced keratoconus. FINANCIAL DISCLOSURE: No author has a financial or proprietary interest in any material or method mentioned.
Elsevier
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