Ultrasonographic evaluation of the anterior segment of the eyeball in dogs

Abstract

To differentiate between different pathologies of the anterior segment of the eyeball, it is necessary to present the clear dimensions of the structures under study. Thus, in the case of inflammation of the anterior uveal tract, an increase of intraocular pressure and the formation of complications, there is a change in the structures of the anterior part of the eye. In addition, when the inflammatory process becomes chronic, it is important to evaluate the changes in the iris, the depth of the anterior chamber, and the size of the iridocorneal angle, especially in dogs, as they are more prone to the development of secondary glaucoma. Summarized and refined by new research information on the ultrasonographic evaluation of the anterior segment of the eyeball in dogs is discussed. The authors measured certain structures of the anterior eye and compared them with the existing data from domestic and foreign studies. The original data on the criteria of the structures of the anterior segment of the eye in dogs without clinical manifestations of eye diseases was also obtained as previously published papers described a comparison of the parameters of the iridocorneal angle in dogs without clinical manifestations of eye diseases and with signs of glaucoma. There was also data on the measurement of the structures of the anterior segment of the eye in cats without ophthalmic pathologies. During the study, the average values of the size of the iridocorneal angle, the depth of the anterior chamber of the eye, the thickness of the cornea, and the iris were clarified. The authors focus on the values obtained from clinically healthy dogs, and that sets the norm for the structures of the anterior segment of the eye during their ultrasonographic evaluation.