The location and design of clear corneal incisions (CCI) during implantable collamer lens (ICL) implantation can subtly influence postoperative corneal astigmatism and higher-order aberrations (HOAs), according to a study.
The retrospective study included 122 eyes divided into temporal CCI (75 eyes) and superior CCI (47 eyes) groups.
Measurements of corneal astigmatism and HOAs were conducted using a Pentacam HR analyzer, while CCI morphology was assessed with anterior segment optical coherence tomography (AS-OCT). Key parameters included incision width (Angle-W), length (IL), incision angles (Angle-En/Ex), and the incision’s distance from the corneal apex (Dis-En/Ex).
Results showed that both groups achieved satisfactory safety and efficacy postoperatively. The temporal CCI group had longer Dis-En and Dis-Ex values, while the superior CCI group demonstrated a wider Angle-W. Anterior and posterior corneal SIA were similar between groups, but anterior SIA in the superior CCI group correlated significantly with Dis-En and Dis-Ex. Temporal CCI increased Z (3, 1), while superior CCI elevated Z (3, 3), with CCI morphology influencing corneal Z (4, -4) and Z (4, 4) in the superior CCI group.
Reference
Wang J, He X, He Q, et al. Effects of clear corneal incision location and morphology on corneal surgically induced astigmatism and higher-order aberrations after ICL V4c implantation. Front Med (Lausanne). 2024;11:1491901. doi: 10.3389/fmed.2024.1491901. PMID: 39568735; PMCID: PMC11576198.
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