Clinical outcome of intrastromal corneal ring segment implantation with two different nomograms in keratoconus patients

Autor: Amr Mounir, Ahmed H Saghir, Gamal Radwan, Ahmad H Aldghaimy
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Delta Journal of Ophthalmology, Vol 25, Iss 1, Pp 14-24 (2024)
Druh dokumentu: article
ISSN: 1110-9173
2090-4835
DOI: 10.4103/djo.djo_49_23
Popis: Aim The aim of this study was to assess the clinical effects of Keraring implantation in patients with keratoconus (KC) using a newly created nomogram (NN) based on cone location and Q value compared with the manufacturer’s standard nomogram (SN). Patients and methods This is a prospective randomized controlled clinical trial that included 100 keratoconic eyes of 100 patients. The patients were randomly assigned into two groups: group NN and group SN. Group NN underwent Keraring implantation based on the newly developed nomogram, while group SN followed the manufacturer’s standard nomogram. The primary outcome measures included visual acuity, different refractive measurements, keratometry values, and Q values, while the secondary outcome measure was Belin ABCD KC grading. All outcome measures were evaluated at 12 months postoperatively. Results The mean age of group NN was 22.96±7.45 years and that of group SN was 24.12±7.00 years, with no statistically significant difference (P=0.46). At 3 months postoperatively, group NN demonstrated substantial improvements compared with group SN. Group NN exhibited a greater improvement in uncorrected distance visual acuity [mean difference (MD) in LogMAR visual acuity=−0.61 compared with −0.31 in group SN, P
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