Observational studyBMC ophthalmology2025
A pilot prospective study based on scanning OCT: the intraoperative vault model predicts postoperative vault.
Observational study in BMC ophthalmology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeTo evaluate the correlation between intraoperative vault measured by optical coherence tomography (OCT) and postoperative vault, and to assess dynamic changes in vault following EVO implantable collamer lens (ICL) implantation.
settingEye and ENT Hospital of Fudan University.
designProspective observational study.
methodsThis prospective study enrolled 14 patients (5 males, 9 females) who underwent EVO ICL implantation at the Eye and ENT Hospital of Fudan University between July and August 2024, involving a total of 27 eyes. The mean age of the patients was 25.5 ± 4.4 years (range: 19 to35 years), and the average manifest refraction spherical equivalent was - 7.84 ± 2.25 D (range: -11.63 to - 2.00 D). Intraoperative OCT was used to measure real-time vault height without the application of viscoelastic agents. Central vault was measured using CASIA-2 immediately after ICL implantation and reassessed at 1 day, 1 week, and 1 month postoperatively. At each follow-up, visual acuity, subjective and objective refraction, and anterior segment parameters were recorded.
resultsThe mean intraoperative vault was 937.30 ± 402.27 μm. Postoperative vault measurements demonstrated a progressive decline: 912.00 ± 269.96 μm at 2 hours, 777.43 ± 252.19 μm at 1 day, 722.22 ± 226.37 μm at 1 week, and 675.98 ± 224.34 μm at 1 month. A strong correlation was observed between intraoperative and postoperative vault values, with an r² of 0.827 at 2 hours. Bland-Altman analysis indicated a systematic bias of 39.63 μm, with 92.6% of eyes falling within the 95% limits of agreement. The anterior chamber depth to both the crystalline lens and ICL remained stable throughout the postoperative period.
conclusionThe vault measured by intraoperative OCT during EVO ICL implantation closely corresponded with postoperative measurements obtained via CASIA-2, and vault decreased in the early postoperative period.
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