Observational studyJournal of cataract and refractive surgery2026
Direct measurement of the horizontal and vertical ciliary sulcus placements using ultrasound biomicroscopy in myopic eyes.
Observational study in Journal of cataract and refractive surgery, 2026. 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 investigate the spatial placements of the horizontal and vertical ciliary sulcus through ultrasound biomicroscopy (UBM) analysis.
settingEye and ENT Hospital of Fudan University, Shanghai, China.
designProspective observational clinical study.
methodsThis study comprised 82 eyes of preoperative implantable collamer lens (ICL) candidates with myopic ICL. UBM was used to measure the ciliary sulcus-to-sulcus (STS), central distance from endothelium to STS (ASL) crystalline lens to STS (STSL), the angle-to-angle distance (ATA), and anterior chamber depth (ACD) to crystalline lens in both the horizontal and vertical orientations. Mean keratometry, axial lengths, and horizontal white-to-white distance were also recorded.
resultsThe mean ASL was 3.574 ± 0.183 and 3.725 ± 0.198 mm, while the mean STSL was 0.488 ± 0.175 and 0.629 ± 0.161 mm in the horizontal and vertical orientations, respectively ( P < .001). The vertical STSL (vSTSL) exceeded the horizontal STSL (hSTSL) by a mean difference of 0.141 ± 0.128 mm, and similarly, the vASL exceeded the hASL by a mean difference of 0.151 ± 0.137 mm. Both the hSTSL and vSTSL showed a negative correlation with ACD ( P < .001). The difference in STSL (vSTSL - hSTSL) was positively correlated with vSTSL, vASL, and the difference in STS (all P < .05) and negatively correlated with hSTSL and hASL (both P < .05).
conclusionsThe ciliary sulcus is typically located more posteriorly in the vertical orientation than in the horizontal orientation.
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