Multiple prominent gelatinous mulberry-shaped nodules form beneath the corneal epithelium during the first decade of life in gelatinous drop-like corneal dystrophy which cause photophobia, tearing, corneal foreign body sensation and severe progressive loss of vision. Lisch epithelial corneal dystrophy is characterized by feather shaped opacities and microcysts in the corneal epithelium that are arranged in a band-shaped and sometimes whorled pattern. Painless blurred vision sometimes begins after sixty years of life.Corneal stromal dystrophies – Macular corneal dystrophy is manifested by a progressive dense cloudiness of the entire corneal stroma that usually first appears during adolescence and eventually causing severe visual impairment. In granular corneal dystrophy multiple small white discrete irregular spots that resemble bread crumbs or snowflakes become apparent beneath Bowman zone in the superficial central corneal stroma. They initially appear within the first decade of life. Visual acuity is more or less normal. Lattice dystrophy starts as fine branching linear opacities in Bowmans layer in the central area and spreads to the periphery. Recurrent corneal erosions may occur. The hallmark of Schnyder corneal dystrophy is the accumulation of crystals within the corneal stroma which cause corneal clouding typically in a ring-shaped fashion.Posterior corneal dystrophies – Fuchs corneal dystrophy presents during the fifth or sixth decade of life. The characteristic clinical findings are excrescences on a thickened Descemet membrane (cornea guttae), generalized corneal edema and decreased visual acuity. In advanced cases, abnormalities are found in all the layers of the cornea. In posterior polymorphous corneal dystrophy small vesicles appear at the level of Descemet membrane.
and has classified disease into four groups as follows:

Epithelial and subepithelial dystrophies
Epithelial basement membrane dystrophy
Epithelial recurrent erosion dystrophies (Franceschetti corneal dystrophy, Dystrophia Smolandiensis, and Dystrophia Helsinglandica)
Subepithelial mucinous corneal dystrophy
Meesmann corneal dystrophy
Lisch epithelial corneal dystrophy
Gelatinous drop-like corneal dystrophy

Bowman Layer dystrophies
Reis–Bücklers corneal dystrophy
Thiel–Behnke corneal dystrophy
Stromal dystrophies-
TGFB1 corneal dystrophies
Lattice corneal dystrophy, type 1 variants (III, IIIA, I/IIIA, IV) of lattice corneal dystrophy
Granular corneal dystrophy, type 1
Granular corneal dystrophy, type 2

Stromal dystrophies
Macular corneal dystrophy
Schnyder crystalline corneal dystrophy
Congenital stromal corneal dystrophy
Fleck corneal dystrophy
Posterior amorphous corneal dystrophy
Central cloudy dystrophy of François
Pre-Descemet corneal dystrophy

Endothelial dystrophies
Fuchs dystrophy
Posterior polymorphous corneal dystrophy
Congenital hereditary endothelial dystrophy
X-linked endothelial corneal dystrophyThe following (now historic) classification was by Klintworth:Superficial dystrophies:

Epithelial basement membrane dystrophy
Meesmann juvenile epithelial corneal dystrophy
Gelatinous drop-like corneal dystrophy
Lisch epithelial corneal dystrophy
Subepithelial mucinous corneal dystrophy
Reis-Bucklers corneal dystrophy
Thiel–Behnke dystrophyStromal dystrophies:

Lattice corneal dystrophy
Granular corneal dystrophy
Macular corneal dystrophy
Schnyder crystalline corneal dystrophy
Congenital stromal corneal dystrophy
Fleck corneal dystrophyPosterior dystrophies:

Fuchs dystrophy
Posterior polymorphous corneal dystrophy
Congenital hereditary endothelial dystrophy

Treatment
Early stages may be asymptomatic and may not require any intervention. Initial treatment may include hypertonic eyedrops and ointment to reduce the corneal edema and may offer symptomatic improvement prior to surgical intervention.Suboptimal vision caused by corneal dystrophy may be helped with scleral contact lenses but eventually usually requires surgical intervention in the form of corneal transplantation. Penetrating keratoplasty, a common type of corneal transplantation, is commonly performed for extensive corneal dystrophy.With penetrating keratoplasty (corneal transplant), the long-term results are good to excellent. Recent surgical improvements have been made which have increased the success rate for this procedure. However, recurrence of the disease in the donor graft may happen.