In this study ten pairs of superior gland of third eyelid of 10 camels free of apparent ocular disease were examined to compare the normal anatomical and histological properties of these glands. After dissecting, all of glands were characterized and measured (length and width) in left and right side. In camel, superior gland of third eyelid was oval shape and irregular in outline. The gland was located within the orbit on the medial aspect of the eyeball in animals that posses a nictitating membrane. Posterior surface of the gland was convex and attached to nictitating membrane. The anterior surface was concave that is contacted with bulb of eye. The mean length of superior gland of third eyelid was 28.7 ± 2.66 mm and 27.2 ± 2.39 mm in left and right side, respectively in anterior-posterior direction. The mean width of it was 17.4 ± 0.84 mm and 16.1 ± 0.87 mm in left and right side, respectively in superior-inferior dimension. There was significant difference between width of left and right superior gland of third eyelid. The mean width of the left superior gland was greater than the right and the difference was significant (P<0.05). The histology of gland revealed secretary units of tubuloacinar and serous with scattered alveolar units. Secretory cells had the typical appearance of serous cells. Tubuloacinar units completely surrounded hyaline cartilage of the third eyelid. The Masson Trichrome stained connective tissue septae surrounding individual acinus and tubules in camel superior gland. Larger sheets of connective tissue with inter and intralobular ducts as well as veins and arteriols were found and separated the gland into lobules.

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