Classification of ptosis:   Simple ptosis. Ptosis associated with deformities of lids and blepharophimosis. Ptosis associated with varying degrees of extensive ophthalmoplegia. Ptosis associated with synkinetic movements of jaw and lids synkinetic ptosis.

Sympathetic ptosis associated with congenital sympathetic palsy. Periodic ptosis associated with congenital sympathetic palsy. Intermittent pseudo ptosis associated with d retraction syndrome.