Vault changes in eyes with a vertically implanted implantable collamer lens
1Masayuki Ouchi Eye Clinic, 9-1 Nishikujo Ohkuni-cho, Minami-ku, Kyoto, 601-8449, Japan. mouchi@skyblue.ocn.ne.jp.
Scientific Reports
|February 12, 2024
Summary
Vertical fixation of implantable collamer lenses (ICL) results in a lower vault than predicted. This study found vertical ICL fixation reduced vault by over 100 μm compared to horizontal fixation.
Area of Science:
- Ophthalmology
- Medical Optics
- Biomedical Engineering
Background:
- The sulcus-to-sulcus vertical diameter exceeds the horizontal diameter.
- The impact of vertical implantable collamer lens (ICL) positioning on postoperative vault relative to preoperative predictions remains unclear.
Purpose of the Study:
- To investigate postoperative and preoperative predicted vaults in patients undergoing vertical ICL fixation.
- To compare vault outcomes between vertical and horizontal ICL fixation methods.
Main Methods:
- Prospective consecutive case series involving 180 patients with myopic astigmatism.
- Patients were divided into horizontal (n=90) and vertical (n=90) ICL fixation groups.
- Anterior segment optical coherence tomography (A-OCT) was used for biometrics at multiple postoperative time points.
Main Results:
- Anterior chamber depth remained stable and showed no significant difference from preoperative values in either group.
- Postoperative vault was significantly lower in the vertical fixation group compared to the horizontal fixation group.
- The discrepancy between measured and predicted vault was significantly greater in the vertical group.
Conclusions:
- Vertical ICL fixation leads to a greater-than-expected reduction in vault compared to horizontal fixation.
- Vertical ICL fixation reduced vault by over 100 μm, deviating from A-OCT predictions.
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