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Journal of Entomology and Zoology Studies
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P-ISSN: 2349-6800, E-ISSN: 2320-7078

Journal of Entomology and Zoology Studies

2020, Vol. 8, Issue 1
Comparative ophthalmoscopic examination of normal retinal fundus in camel and sheep

Dr. S Rajathi, Dr. R Ramprabhu, Dr. Chhavi Gupta and Dr. RC Sundararajan

The eye is a highly complex organ structurally and functionally. The eye is not only the organ of sight but also a window through which one can detect the state of vascular and central nervous system. The retinal fundus of each species is typical and varied among species with little individual variation. The study was conducted on six adult apparently healthy sheep and camels that were brought to Teaching Veterinary Clinical Complex, Tirunelveli. Direct panophthalmoscope with iphone attachment was used. Animals restrained and images of retinal fundus was obtained and analysed for morphology of tapetum, non tapetal areas, optic nerve head, Bergmeister’s papilla and retinal vascular pattern. The tapetum in sheep is bluish green in colour. The stars of winslow in sheep was appeared as small, uniform scattering of red or dark pink dots or lines throughout the tapetum. Tapetum was absent in camels. The non tapetal area was homogenous, brown or black with rich visible choroidal vasculature in sheep. The optic nerve head in sheep was kidney shaped and in camel, it was bean or elongated circular in shape. The Optic disc was located in the non tapetal area near the tapetal and non tapetal junction in sheep. The colour of the optic disc varied from pale pink to pink in sheep. In camel the colour of the optic disc was pink to red. Bergmeister’s Papilla was visible in sheep and in camel the Bergmeister’s papilla was large by comparison. Retinal vascular pattern is holangiotic in sheep and camel.
The eye is a highly complex organ structurally and functionally (Kurup et al., 2017) [9]. The eye is not only the organ of sight but also a window through which one can detect the state of vascular and central nervous system (Dukes, 1969) [4]. The most important organs of sense are the eyes because it receives up to 80 % of external information by means of sight (Haupt and Huber, 2008) [6]. The ophthalmic examination consisted of assessment of visual acuity, visual field, intraocular pressure examiation, slit lamp examination, dilated ophthalmoscopy and photography of the lens and fundus (Taylor et al., 2004) [13]. A posterior segment eye examination includes the examination of the vitreous humour, tapetum lucidum and all the visible parts of retinal fundus. The retinal fundus examination is also useful in the differential diagnosis of systemic infectious diseases, vascular disorders, CNS diseases etc. It is only area where the blood vessels and the central nervous system can be seen directly (Crick and Khaw, 2003) [2]. The normal fundus examination of the animals like deer (Dukes, 1969) [4], dogs (Berenek et al., 2007) [1], sheep and goats (Galen et al., 2006) [5] were done. The retinal fundus of each species is typical and varied among species with little individual variation. So the present study was done with the aim to characterise the normal ocular fundus image in camel and sheep and to compare among them.
Pages : 1265-1267 | 417 Views | 124 Downloads


Journal of Entomology and Zoology Studies Journal of Entomology and Zoology Studies
How to cite this article:
Dr. S Rajathi, Dr. R Ramprabhu, Dr. Chhavi Gupta, Dr. RC Sundararajan. Comparative ophthalmoscopic examination of normal retinal fundus in camel and sheep. J Entomol Zool Stud 2020;8(1):1265-1267.

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