Work for this study was carried out at The Royal Veterinary College, University of London. UK.
ULTRASONOGRAPHIC ANATOMY OF THE BOVINE EYE
Article first published online: 3 MAR 2008
© Copyright 2008 by the American College of Veterinary Radiology
Veterinary Radiology & Ultrasound
Volume 49, Issue 2, pages 172–175, March–April 2008
How to Cite
POTTER, T. J., HALLOWELL, G. D. and BOWEN, I. M. (2008), ULTRASONOGRAPHIC ANATOMY OF THE BOVINE EYE. Veterinary Radiology & Ultrasound, 49: 172–175. doi: 10.1111/j.1740-8261.2008.00345.x
This study was approved by the Committee of Ethical Care of Animals.
The initial findings from this study were presented as an abstract at ACVIM Forum 2006.
- Issue published online: 3 MAR 2008
- Article first published online: 3 MAR 2008
- Received March 1, 2007; accepted for publication September 25, 2007.
- veterinary anatomy
The purposes of the study were to describe the ultrasonographic appearance and measurements of the normal bovine eye, to compare the measurements to those reported previously for cadaveric eyes and to describe differences between ocular dimensions of Holstein Friesian and Jersey cattle. Sixty transpalpebral ocular ultrasonographic examinations were performed on 30 adult Holstein Friesian cows, and 16 examinations were performed on 8 adult Jersey cows. Transpalpebral ultrasonographic images were obtained with a 10 MHz linear transducer in both horizontal and vertical imaging planes. The ultrasonographic appearance of structures within the bovine eye is similar to that in other species, although the ciliary artery was frequently identified, appearing as a 0.33±0.04 cm diameter hypoechoic area. The axial length of the globe was significantly greater in Holstein Friesian cattle (3.46±0.09 cm) compared with Jersey cattle (3.27±0.19 cm; P=0.001), although the vitreous depth was smaller in Holstein Friesian cattle (1.46±0.09 cm) (P=0.0009). The anterioposterior depth of the lens was significantly greater in Jersey cattle (1.92±0.11 cm) and the cornea was thinner in Jersey cattle (0.17±0.02 cm). The appearance and ocular distances for live animals were similar to those reported previously for cadaveric specimens. The knowledge of normal ocular dimensions facilitates the use of ultrasonography in the evaluation of ocular disease in cattle.