RT Journal Article
T1 Intrastromal Corneal Ring Segment in Moderate to Severe Keratoconus: Refractive, Topographic and Aberrometric Changes
A1 González Pérez, Javier
A1 García Queiruga, Jacobo
A1 Touriño Peralba, Rosario
A1 Martínez Pérez, Laura
A1 Rodríguez Ares, María Teresa
K1 Keratoconus
K1 Intrastromal corneal ring segments
K1 Keraring
K1 Vacuum system
K1 K astigmatism
K1 Spherical aberration
K1 Coma
K1 Corneal thickness
AB Aim: This study evaluates the topographic and aberrometric changes induced by ICRS in patients with moderate and severe keratoconus and analyzes pre-operative factors affecting the refractive and visual outcomes. Methods: This retrospective, observational, nonrandomized, and single-center case series, included 21 keratoconic eyes of 21 patients implanted with Keraring ICRS (Mediphacos, Belo Horizonte, Brazil), using the manual tunnelization technique and vacuum device. All subjects were examined after 6 months following surgery, including the measurement of uncorrected visual acuity (UCVA), best-Corrected Distance Visual Acuity (CDVA), refractive data, pachymetry, corneal topography, and aberrometry. Results: The mean age of 21 patients was 31.14±10.65 years, eleven (52%) were male. Kerarings were successfully implanted in all eyes. After 6-month from implantation, significant increase was found in mean UCVA (P<0.01) and CDVA (P<0.01). There was a statistically significant reduction in refractive cylinder (P<0.01), corneal cylinder (P=0.020), Kmax (P<0.01) and BFS (P=0.02). Statistically significant differences were found in several aberrometric parameters for 6-mm pupil, RMS HOA (P=0.045), oblique astigmatism (P=0.009), vertical coma (P=0.02), and oblique trefoil (P=0.018). Conclusion: Analysis of the visual outcomes after Keraring ICRS implantation showed a significant postoperative corneal flattening with a subsequent increase in UCVA and CDVA. Visual, refractive, topographic and aberrometric parameters remarkably change in the 6-month period after Kerarings implantation. Kerarings in this sample have shown to provide a mild visual rehabilitation between 2 and 3 lines, particularly in more advanced cases. Furthermore, flattening of the anterior segment induced by the surgery might be beneficial for contact lens fitting.
PB Crimson Publishers
SN 2578-0360
YR 2024
FD 2024-01-29
LK http://hdl.handle.net/10347/32960
UL http://hdl.handle.net/10347/32960
LA eng
NO Javier GonzálezPérez*, Jacobo García Queiruga, Rosario Touriño Peralba, Laura MartínezPérez and Mª Teresa Rodríguez Ares. Intrastromal Corneal Ring Segment in Moderate to Severe Keratoconus: Refractive, Topographic and Aberrometric Changes. Med Surg Ophthal Res. 3(3). MSOR. 000565. 2024
DS Minerva
RD 28 abr 2026