- Usually seen in the elderly.
- Maybe seen in association with peripheral band keratopathy or following trauma.
- Familial type maybe occurs with X-linked megalocornea or in a juvenile form of anterior mosaic crocodile shagreen.
- Symptoms: usually asymptomatic
- Appears as bilateral, polygonal, grayish-white opacities
- Anterior shagreen are seen in the deep layers of the epithelium or in Bowman's layer, and become more apparent after instillation of fluorescein drop
- Posterior shagreen are generally seen in the central deep cornea which makes it difficult to differentiate with a central cloudy dystrophy of the cornea
- No treatment is required.