The aim of the paper is the presentation of a not very well known group of corneal diseases in dogs: dystrophies and degenerations. The course of these diseases involves changes in the metabolism of corneal cells, which leads to the loss of corneal transparency and constitutes a threat to the process of vision. Both these groups present very similar clinical images and it is difficult to differentiate them accurately. Dystrophies are divided into: endothelial dystrophy, stromal dystrophy and epithelial dystrophy. Each of these forms has been described and characterized, and appropriate therapeutic procedures have been specified. Among degenerations lipid and calcium degenerations were distinguished. Their clinical forms were described, primary causes and therapeutic procedures were specified as well.