Visual and Tomographic Outcomes of a 300° Arc-length ICRS Implantation in Moderate to Advanced Central Keratoconus

Impacto

Downloads

Downloads per month over past year

Alfonso, José F. and Torquetti, Leonardo and Fernández Vega-Cueto, Luis and Allan, Bruce and Poo López, Aranzazu and Alfonso Bartolozzi, Belén and Cruz, José, de la and Monteiro, Tiago and Madrid Costa, David (2021) Visual and Tomographic Outcomes of a 300° Arc-length ICRS Implantation in Moderate to Advanced Central Keratoconus. Journal of Refractive Surgery, 37 (4). pp. 249-256. ISSN 1081-597X

[thumbnail of 1081597X-20210115-01.pdf] PDF
Restringido a Repository staff only

959kB

Official URL: https://doi.org/10.3928/1081597X-20210115-01




Abstract

PURPOSE:To assess the outcomes of implanting a new 300° arc-length intrastromal corneal ring segment (ICRS) in moderate to advanced central hyperprolate keratoconus.
METHODS:Forty-two eyes with moderate to advanced central hyperprolate keratoconus were evaluated before and after implanting an inferior 300° ICRS (AJL Ophthalmic). The clinical measurements taken included manifest refraction, uncorrected (UDVA) and corrected (CDVA) distance visual acuity (logMAR scale), and corneal tomographic analysis (Sirius; Costruzioni Strumenti Oftalmici). Changes in the anterior and posterior corneal surfaces and the root mean square (RMS) for coma-like aberrations for a pupil size of 4.5 mm were evaluated. All examinations were performed before surgery and 6 months after surgery.
RESULTS:The mean UDVA improved from 1.12 ± 0.48 logMAR preoperatively to 0.73 ± 0.37 logMAR postoperatively (P < .0001). The mean CDVA changed from 0.33 ± 0.20 to 0.20 ± 0.11 logMAR (P < .0001). Postoperatively, the CDVA improved by two or more lines in 45.2% of the eyes and increased by one line in 19.04%, and none of the patients lost lines of CDVA. All of the anterior and posterior corneal tomographic parameters analyzed were significantly improved after surgery, except posterior flat keratometry, which remained unchanged. In 80.95% of the eyes, the postoperative mean keratometry was 50.00 diopters or less. The 6-month RMS for coma-like aberrations also declined significantly from 1.57 ± 0.68 to 1.06 ± 0.42 µm after surgery (P < .0001).
CONCLUSIONS:These results suggest that implanting a 300° arc-length ICRS is a safe and effective procedure for treating patients with moderate to advanced central hyperprolate keratoconus and clear cornea.


Item Type:Article
Additional Information:

Submitted: July 17, 2020; Accepted: December 29, 2020

Uncontrolled Keywords:Keratoconus; ICRS; Intrastromal corneal ring; Cornea surgery
Subjects:Medical sciences > Medicine > Surgery
Medical sciences > Medicine > Ophtalmology
Medical sciences > Optics > Optometry
Medical sciences > Optics > Imaging systems
ID Code:65132
Deposited On:27 Apr 2021 16:08
Last Modified:28 Apr 2021 07:49

Origin of downloads

Repository Staff Only: item control page