Comparative Histological and Histochemical Studies on Retina of Sheep and Goat
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Authors
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S. Rajathi
Tamilnadu Veterinary and Animal Sciences University
Keywords:
Goat, Histology, Immunohistochemistry, Retina, Sheep.Abstract
The present study was conducted on eye ball of six from each apparently healthy young and adult sheep
and goat. Micrometric parameters namely total thickness and thickness of various layers of central and peripheral
retina were measured in young and adult sheep and goat. The sensory part of the retina was composed of ten layers
namely retinal pigmented epithelium (RPE), layer of rods and cones, external limiting membrane, outer nuclear
layer, outer plexiform layer, inner nuclear layer, inner plexiform layer, ganglion cell layer, nerve fiber layer and
Internal limiting membrane in both young and adult sheep and goat. Ganglion cell layer showed prominent large
blood vessels and large proportion of large sized ganglion cells in young sheep and goat when compared to adult
animals. Retina was thick at optic disc (Central) region and thin towards the ora ciliaris retinae. The micrometrical
mean values of the total thickness of retina, thickness of various layers of central and peripheral retina among
young and adult sheep and goat did not show significant difference at 5 % level. Glial Fibrillary Acidic Protein
(GFAP) antibody expression of Muller's cells was found in the inner plexiform layer and strong positivity was
found in the ganglion cell layer in both young and adult sheep and goat.