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Corneal ulcers in cats can be caused by trauma, detergent burns, infections, and other eye diseases. One common cause not seen in dogs is infection with feline herpesvirus 1 (FHV-1). FHV-1 causes ulceration by direct infection of the epithelial cells. Lesions appear as round or dendritic (branching) ulcers.
Meibomian glands (also called tarsal glands, palpebral glands, and tarsoconjunctival glands) are sebaceous glands along the rims of the eyelid inside the tarsal plate. They produce meibum , an oily substance that prevents evaporation of the eye's tear film .
Palpebral form- Usually upper tarsal conjunctiva of both the eyes is involved. Typical lesion is characterized by the presence of hard, flat-topped papillae arranged in cobblestone or pavement stone fashion. In severe cases papillae undergo hypertrophy to produce cauliflower-like excrescences of 'giant papillae'.
Thelaziasis is the term for infestation with parasitic nematodes of the genus Thelazia.The adults of all Thelazia species discovered so far inhabit the eyes and associated tissues (such as eyelids, tear ducts, etc.) of various mammal and bird hosts, including humans. [2]
Close-up of prolapsed gland in small breed dog. KCS is not common in dogs, affecting one per cent of the dog population. [9] KCS is a chronic degenerative conjunctivitis that can lead to impaired vision and blindness. [2] KCS has a wide array of causes including drug toxicity, cherry eye, previous surgery, trauma, and irradiation. [2]
The lateral angles are attached to the zygomatic bone by the lateral palpebral raphe. The medial angles of the two plates end at the lacrimal lake, and are attached to the frontal process of the maxilla by the medial palpebral ligament). The sulcus subtarsalis is a groove in the inner surface of each eyelid.
The conjunctival inflammation is called "active trachoma" and is usually seen in children, especially those in preschool. It is characterized by white lumps in the undersurface of the upper eyelid (conjunctival follicles or lymphoid germinal centers) and by nonspecific inflammation and thickening, often associated with papillae.
Their ducts unite into a rather long sinus which open into the fornix conjunctiva. [2] There are approximately forty Krause glands in the region of the upper eyelid, and around 6 to 8 in the region of the lower lid. [2] The function of these glands are to produce tears which are secreted onto the surface of the conjunctiva.