Comparative study of the retina in albino rat and rabbit during the embryonic life

ABSTRACT

A comparative study was carried out in the retina of albino rat and rabbit embryos. The age of albino rat embryos in this study was 13, 14, 15, 16, 18 and 20 days. In the rabbit embryo we used the ages of 6,7,8,9, 16 and 22 days. The retina of the different ages was examined by the light microscope and the followings was found 1- The optic vesicle arises from the wall of the diencephalon by the 6[th] days in the rabbit embryos and by 13 days of albino rat embryos. 2- The pigmentation of the outer layer of the optic cup takes place by the day 8 in rabbit embryos but not present in the outer layer of the optic cup in albino rat embryos. 3- The retina completes its differentiation and formation its 10 layers by the day 20 in albino rat and by the day 22 in the rabbit embryos