Herbig Lena E, Eule J Corinna
Small Animal Clinic, Freie Universität Berlin, Oertzenweg 19b, 14163, Berlin, Germany.
Vet Ophthalmol. 2015 Nov;18(6):462-71. doi: 10.1111/vop.12252. Epub 2015 Jan 27.
The aim of this study was to determine the central corneal thickness (CCT) of healthy equine eyes with high-frequency ultrasound (HF) and ultrasound biomicroscopy (UBM) and to measure the axial dimensions with B-mode ultrasound. Additionally, the influence of the age on the measured dimensions of the globe was analyzed.
Fifty warm blood horses (mean age 23.0 ± 21.12 months) were divided into 3 age groups (group 1: 0-6 months; group 2: ≥7-30 months; and group 3: ≥31-78 months).
Corneal measurements were performed with a 22-MHz and a 50-MHz transducer. Crystalline lens thickness (CLT), vitreous chamber depth (VCD), and axial globe length (AGL) were measured at a frequency of 10 MHz. Anterior chamber depth (ACD) was calculated. The eyes were measured under general anesthesia nonrelated to this study.
The mean CCT of 50 eyes was 818 ± 41 μm. The mean values ± SD in mm for axial dimensions were AGL 34.7 ± 2.7, ACD 3.4 ± 0.7, CLT 10.0 ± 0.9, and VCD of 20.4 ± 1.5. A positive correlation with increasing age was found for all dimensions. No significant differences were found between the gender and the left or right eye.
HF and UBM are valuable high-resolution imaging tools for CCT measurements in horses. The here-obtained values support previous findings that a positive correlation with increasing age exists for CCT, ACD, CLT, VCD, and AGL in horse.
本研究旨在使用高频超声（HF）和超声生物显微镜（UBM）测定健康马眼的中央角膜厚度（CCT），并使用B型超声测量眼轴尺寸。此外，分析年龄对所测眼球尺寸的影响。
50匹温血马（平均年龄23.0±21.12个月）被分为3个年龄组（第1组：0 - 6个月；第2组：≥7 - 30个月；第3组：≥31 - 78个月）。
使用22MHz和50MHz的探头进行角膜测量。在10MHz频率下测量晶状体厚度（CLT）、玻璃体腔深度（VCD）和眼轴长度（AGL）。计算前房深度（ACD）。在与本研究无关的全身麻醉下对眼睛进行测量。
50只眼睛的平均CCT为818±41μm。眼轴尺寸的平均值±标准差（单位：mm）为AGL 34.7±2.7、ACD 3.4±0.7、CLT 10.0±0.9、VCD 20.4±1.5。所有尺寸均与年龄增长呈正相关。性别和左右眼之间未发现显著差异。
HF和UBM是用于测量马CCT的有价值的高分辨率成像工具。此处获得的值支持先前的研究结果，即马的CCT、ACD、CLT、VCD和AGL与年龄增长呈正相关。
