Corneal dystrophies are:
Corneal dystrophies are primary, bilateral and inherited disorder manifesting occasionally at bih but more usually during first or second decade and sometimes even later in life. Corneal dystrophies are of 3 types: anterior dystrophy, stromal dystrophy and posterior dystrophy.
Primary and unilateral
Primary and bilateral
Primary, bilateral, with systemic disease
Primary unilateral without systemic disease