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Description. The nictitating membrane (completely closed) of a black crowned crane, right eye. The nictitating membrane is a transparent or translucent third eyelid present in some animals that can be drawn across the eye for protection and to moisten it while maintaining vision. The term comes from the Latin word nictare, meaning "to blink".
Dog anatomy. Dog anatomy comprises the anatomical study of the visible parts of the body of a domestic dog. Details of structures vary tremendously from breed to breed, more than in any other animal species, wild or domesticated, [ 1] as dogs are highly variable in height and weight. The smallest known adult dog was a Yorkshire Terrier that ...
The canthus ( pl.: canthi, palpebral commissures) is either corner of the eye where the upper and lower eyelids meet. [ 1] More specifically, the inner and outer canthi are, respectively, the medial and lateral ends/angles of the palpebral fissure . The bicanthal plane is the transversal plane linking both canthi and defines the upper boundary ...
Some canine breeds are genetically more likely to develop eyelid problems, such as dogs with shortened muzzles and flattened faces — think boxers, Boston terriers, French bulldogs, Pekingese ...
Demodex vibrissae. Demodex zalophi. Demodex / ˈdɛmədɛks / is a genus of tiny mites that live in or near hair follicles of mammals. Around 65 species of Demodex are known. [ 2] Two species live on humans: Demodex folliculorum and Demodex brevis, both frequently referred to as eyelash mites, alternatively face mites or skin mites.
Cherry eye. Cherry eye is a disorder of the nictitating membrane (NM), also called the third eyelid, present in the eyes of dogs and cats. [ 1] Cherry eye is most often seen in young dogs under the age of two. [ 2] Common misnomers include adenitis, hyperplasia, adenoma of the gland of the third eyelid; however, cherry eye is not caused by ...
Front of left eye with eyelids separated. Caruncula visible and labeled at left. The lacrimal caruncle, or caruncula lacrimalis, is the small, pink, globular nodule at the inner corner (the medial canthus) of the eye. [ 1] It consists of tissue types of neighbouring eye structures. It may suffer from lesions and allergic inflammation.
An epicanthic fold or epicanthus[ 6] is a skin fold of the upper eyelid that covers the inner corner (medial canthus) of the eye. [ 3] However, variation occurs in the nature of this feature and the possession of "partial epicanthic folds" or "slight epicanthic folds" is noted in the relevant literature. [ 7][ 8][ 9] Various factors influence ...