Corneal dystrophies are:
Primary and unilateral
Primary and bilateral
Primary, bilateral, with systemic disease
Primary unilateral without systemic disease
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.