The presence of central, fine, whitish granular lesions in the stroma of the cornea. this type of corneal dystrophy is usually asymptomatic and begins in childhood and shows a slow progression. later in the course, the corneal epithelium and bowman's layer may be affected. histologically, the cornea shows a uniform deposition of hyaline material. [https://orcid.org/0000-0002-0736-9199]

Granular corneal dystrophy is a slowly progressive corneal dystrophy that most often begins in early childhood. Granular corneal dystrophy has two types: Granular corneal dystrophy type I, also corneal dystrophy Groenouw type I, is a rare form of human corneal dystrophy. It was first described by German ophthalmologist Arthur Groenouw in 1890. Granular corneal dystrophy type II, also called Avellino corneal dystrophy or combined granular-lattice corneal dystrophy is also a rare form of corneal dystrophy...