Williams D L, Goddard P J, Brancker W M
Department of Clinical Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 OES, UK.
Vet J. 2007 Mar;173(2):456-8. doi: 10.1016/j.tvjl.2005.11.012. Epub 2006 Feb 2.
This paper describes the use of ultrasound to document ocular abnormalities occurring in farmed halibut. A cystic condition of the posterior segment of farmed halibut with a number of ocular sequelae has been reported previously. Further research to elucidate the aetiology and pathogenesis of this condition requires in vivo determination of ocular health over and above that provided by ophthalmoscopy alone. Ocular ultrasonography would appear to be an optimal technique for evaluating the presence of gas- or fluid-filled cysts in the posterior segment and retrobulbar space. The aim of this study was to evaluate this technique for investigation of the piscine eye and specifically to define the role of ultrasonography to detect gas bubble formation in the choroid of farmed halibut, a factor considered central to ocular pathology in many of these fish. In particular the study sought to assess the minimum size of halibut in which intraocular cystic lesions could be identified by ultrasonography and the minimum size of lesion identified by ocular ultrasonography. A second objective was to correlate ultrasonographic findings with lesions found at post mortem ocular examination. A number of halibut of varying sizes, with and without clinically apparent ocular lesions, were subjected to examination under anaesthesia. A proportion of these fish were subsequently sacrificed to allow post mortem ocular evaluation with the aim of correlating ultrasonographic findings with intraocular pathological defects.
本文描述了利用超声记录养殖大比目鱼出现的眼部异常情况。此前已有报道称养殖大比目鱼后段出现囊性病变并伴有多种眼部后遗症。要进一步阐明这种病症的病因和发病机制，除了单纯的检眼镜检查外，还需要对眼部健康状况进行活体测定。眼部超声检查似乎是评估后段和球后间隙中是否存在气体或液体填充囊肿的最佳技术。本研究的目的是评估该技术在鱼类眼部检查中的应用，特别是确定超声检查在检测养殖大比目鱼脉络膜中气泡形成方面的作用，这一因素被认为是许多此类鱼类眼部病理学的核心因素。特别是，该研究试图评估能够通过超声检查识别眼内囊性病变的大比目鱼的最小尺寸，以及通过眼部超声检查识别的病变的最小尺寸。第二个目标是将超声检查结果与死后眼部检查发现的病变进行关联。对一些大小各异、有或没有明显眼部病变的大比目鱼进行了麻醉检查。随后，对其中一部分鱼实施安乐死，以便进行死后眼部评估，目的是将超声检查结果与眼内病理缺陷进行关联。
