ESCRS - PP21.17 - Comparison Of Two Different 360-Degree Intrastromal Corneal Rings Combined With Simultaneous Accelerated-Corneal Cross-Linking For Management Of Progressive Keratoconus; A 5-Year Comparative Study

Comparison Of Two Different 360-Degree Intrastromal Corneal Rings Combined With Simultaneous Accelerated-Corneal Cross-Linking For Management Of Progressive Keratoconus; A 5-Year Comparative Study

Published 2022 - 40th Congress of the ESCRS

Reference: PP21.17 | Type: Free paper | DOI: 10.82333/vqav-yq47

Authors: Mehrdad Mohammadpour 1 , Mohsen Heirani 1 , Masoud Khorrami-Nejad* 1 , Narges Khoshtinat 1 , Mahsa Ranjbar Pazooki 1

1Tehran University of Medical Sciences,Tehran,Iran, Islamic Republic Of

Purpose

This study aimed to compare five-year outcomes of two complete intracorneal implants (MyoRing versus annular-shaped intracorneal implant [AICI]) combined with accelerated corneal cross-linking (A-CXL) in progressive KCN. 

Setting

Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.

Methods

In this historical cohort study, preoperative and postoperative visual, refractive, tomographic, biomechanical, and aberrometric parameters of 27 eyes of 27 patients who underwent implantation of two complete rings (13 AICI and 14 MyoRing) combined with A-CXL were recorded. 

Results

All pre- and postoperative visual and refractive parameters between the two groups were not significantly different (P>0.05). Comparing pre- and postoperative tomographic measurements showed that anterior corneal surface (ACS) flat-K and corneal thickness at pachymetric apex significantly improved for MyoRing plus A-CXL group after five years (P<0.05). On the other hand, ACS K-max and mean-K values were significantly improved for AICI plus A-CXL group after five years (P<0.05). Both groups revealed significant improvements in ACS steep-K and corneal astigmatism (P<0.05). Five years after surgery, the high order aberration in the AICI group (2.60±0.83) was significantly better than the MyoRing group (1.70±0.43) (P=0.007). 

Conclusions

Both complete intrastromal rings (MyoRing or AICI) combined with A-CXL significantly Improved visual, refractive, and corneal aberrometric, biomechanical, and tomographic parameters and halt the progression of KCN with comparable long-term outcomes.