8/12/2023 0 Comments Dog detached retinaInflammation: Chorioretinitis, optic neuritis, retinal detachment. We are fortunate that our domestic species possess a tapetal layer since this makes the recognition of these pathologic processes much simpler than in atapetal species. In degeneration we may see changes in appearance of a particular layer based on loss of tissue in an overlying tissue layer (‘less’). In inflammatory or neoplastic diseases the layered structures become thickened (‘more’) with infiltrates into one layer affecting the view of underlying structures. In general we need to keep in mind the concept of “ more or less”. Unlike almost any other tissue of the body (excepting the superficial skin layers), ophthalmoscopy allows examination of the layered tissues in detail. In considering the fundus we need to think of a number of superimposed layers of tissue (vitreous through sclera). Nevertheless recognition of the cardinal signs of posterior segment disease can easily be mastered (using indirect ophthalmoscopy) and may give insights into conditions affecting vision or associated with other systemic maladies. Since many (especially the degenerations) have hitherto defied therapy, they assume a lesser significance than diseases of the anterior segment which are often more amenable to therapy in general practice. Books & VINcyclopedia of Diseases (Formerly Associate)ĭiseases of the posterior segment or vitreous, retina, choroids, sclera and optic nerve (the fundus as seen through the pupil of the eye) are often poorly understood.VINcyclopedia of Diseases (Formerly Associate).
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