Fig 2 - uploaded by Mahendra Pratap Singh Tomar
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5.1 cm CVRL showing bud for eyelid (BE), developing cornea (CR), developing lens (L), developing primordia for extra ocular muscles (M) and site for developing optic nerve in the form of thinning of optic cup (OC) and optic fascicle (OF). Masson's trichrome method X40.
Source publication
The developing optic nerve was first observed in CVRL 4.0 cm buffalo fetus. The nerve fibers from the developing
retina radially pointed at the place from where the stalk left the cup. This area was in the form of the thinning of the retinal
wall and the space for the passage of hyaloid artery was seen. In 5.1 cm CVRL fetus, the stalk of optic nerv...
Citations
The development of retina in Indian buffalo (Bubalus bubalis) has not been reported previously. The aim of the present study was therefore to report the major landmarks and the time course in the development of retina. Serial histological sections of Indian buffalo embryos and foetuses were used as group1 (<20.0 cm CVRL), group2 (>20.0 but <40.0 cm CVRL) and group3 (>40.0 cm CVRL). Age estimation was made on the basis of crown vertebral‐rump length (CVRL), which ranged between 36 and 286 days (1.6–94.0 cm). The retina in Indian buffalo was developed in a similar manner to that of the other mammals with the principal differences in the time of occurrence of various layers of this nervous tunic. In 36 days (1.6 cm stage), the foetal retina was composed of pigmented layer and the layer of neuroblasts. Differentiation of layers was first observed in 47 days (4.0 cm CVRL) which became prominent in 52 days (5.1 cm stage). At 120 days (20.5 cm stage), the differentiation of inner plexiform layer and inner nuclear layer was evident. At 143 days (31.0 cm) foetal age, the faint line in neuroblastic layer was the first evidence of the future outer plexiform layer. In foetuses of group III, the retina was comprised of all 10 layers (eight cell layers and two membranes) viz. pigmented epithelium, layer of rods and cones, outer limiting membrane, outer nuclear layer, outer plexiform layer, inner nuclear layer, inner plexiform layer, ganglion cell layer, layer of nerve fibres and the inner limiting membrane.
