Anterior Chamber Depth and Central Corneal Thickness Changes After ICRS Insertion for Treatment of Keratoconus
Narrative Responses:
Purpose
To study pentacam changes after the insertion of ICRS in keratoconic corneas specifically ACD and CCT which are the parameters that might affect the decision regarding further refractive solutions for the disease. This study phase is to be followed by later phases after CCL, and after ICRS removal.
Methods
This a prospective unmasked non randomized study. 21 eyes with keratoconus were subjected to femto laser tunneling and insertion of a pair of kerarings according to the nomogram. preoperative and post operative UCVA, BCVA, and refraction were recorded. Pentacam imaging was performed before and at least 2 months following the procedure. keratometric readings, ACD, and CCT were recorded. Statistical analysis was done using IBM SPSS v20.0 software. Comparisons between preoperative data and postoperative data carried out using related-samples Wilcoxon signed rank test. The results were considered statistically significant with a P-value ≤ 0.05.
Results
The mean ACD was 3.43 +/- 0.23 mm and 3.45 +/- 0.35 mm preoperative and postoperative respectively, the difference was statistically insignificant ( p=0.404). The mean CCT was 453 +/- 47 um and 469+/- 48 um preoperative and postoperative respectively, the difference was statistically significant (p< 0.005).
Conclusion
ICRS insertion does not have any negative effect on subsequent refractive solutions which are affected by ACD and CCT.