Faulkner Josephine, Williams David Leonard, Mueller Karin
Department of Veterinary Medicine, Cambridge University, Cambridge, UK
Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
Vet Rec. 2020 May 16;186(16):e7. doi: 10.1136/vr.105758. Epub 2020 Apr 17.
Alpacas are being more frequently presented to veterinarians in the UK. It is important to validate whether published normal ocular parameters are consistent with the alpaca population in the UK.
Ophthalmic examinations were performed on healthy alpacas () from three farms in East Anglia, UK.
On direct ophthalmoscopy of 35 alpacas, there was a 50 per cent prevalence of opacities within the lens in alpacas older than two years old (n=8/16). There was a 36.8 per cent prevalence of persistent hyaloid arteries in alpacas under two years old (n=7/19). The mean Schirmer tear test-1 value was 20.0 ±6 mm/minute (n=40). The mean intraocular pressure measured by rebound tonometry was 17.2 ±5.5 mmHg (n=46), and applanation tonometry resulted in statistically similar values (P=0.30; n=25). There was a significant variation in intraocular pressure throughout a 24-hour period (n=8). Fluorescein dye was not detected at the nostrils of any of the alpacas which underwent a Jones test to assess nasolacrimal duct patency (n=8).
The ophthalmic findings appear largely consistent with previously published values from North America and continental Europe. Variations include the large range of measurements obtained and evidence of diurnal variation in intraocular pressure.
在英国，越来越多的羊驼被送到兽医处就诊。验证已发表的正常眼部参数是否与英国的羊驼群体一致很重要。
对来自英国东安格利亚三个农场的健康羊驼（）进行眼科检查。
在对35只羊驼进行直接检眼镜检查时，两岁以上羊驼（n = 8/16）晶状体混浊的患病率为50%。两岁以下羊驼（n = 7/19）持续性玻璃体动脉的患病率为36.8%。泪液分泌试验-1的平均值为20.0±6毫米/分钟（n = 40）。用回弹眼压计测量的平均眼压为17.2±5.5毫米汞柱（n = 46），压平眼压计测量结果在统计学上与之相似（P = 0.30；n = 25）。24小时内眼压有显著变化（n = 8）。在接受琼斯试验以评估鼻泪管通畅性的任何羊驼（n = 8）的鼻孔处均未检测到荧光素染料。
眼科检查结果在很大程度上与北美和欧洲大陆先前发表的值一致。差异包括获得的测量范围较大以及眼压昼夜变化的证据。
