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Central corneal thickness measurements and ultrasonographic study of the growing equine eye

Berlin – mechentel news – The aim of this study of LE. Herbig et al. at the Small Animal Clinix of Freie Universität Berlin, Germany, 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 studied and 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. The authors of the study reason in the journal Vetinerary Ophthalmolgy in the january 2015 issue that 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.(bst)

Autoren: Herbig LE, Eule JC. Korrespondenz: Small Animal Clinic, Freie Universität Berlin, Oertzenweg 19b, 14163, Berlin, Germany. Studie: Central corneal thickness measurements and ultrasonographic study of the growing equine eye. Quelle: Vet Ophthalmol. 2015 Jan 27. doi: 10/1111/vop.12252.