Direct measurement of the horizontal and vertical ciliary sulcus placements using ultrasound biomicroscopy in myopic eyes
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Published on: January 26, 2018
Xiaoxue Zhang1, Chiwen Cheng, Xuejun Wang
1From The Second Affiliated Hospital of Nanchang University, Nanchang, China (Zhang, Cheng); The Second Affiliated Hospital of Nanchang, Jiangxi Medical College, Nanchang University, Nanchang, China (Cheng); From the Department of Ophthalmology and Optometry, Eye and ENT Hospital, Shanghai, China (Wang, Shi, Xiao, Lin, Zhou, Liu); National Health Commission Key Lab of Myopia (Fudan University), Shanghai, China (Wang, Shi, Xiao, Lin, Zhou, Liu); Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China (Wang, Shi, Xiao, Lin, Zhou, Liu).
Purpose:
To investigate the spatial placements of the horizontal and vertical ciliary sulcus through ultrasound biomicroscopy (UBM) analysis.
Setting:
Eye and ENT Hospital of Fudan University, Shanghai, China.
Design:
Prospective observational clinical study.
Methods:
This 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.
Results:
The 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).
Conclusions:
The ciliary sulcus is typically located more posteriorly in the vertical orientation than in the horizontal orientation.
