Levator muscle in obscure aquired and congenital ptosis [clinico-pathological study]

This study included 40 patients with ptosis [24 congenital and 16 acquired]. Neurological examination included associated neurological deficit. During surgical correction of levator muscle, sample sent for pathological examination. In the congenital group 7 cases with mild ptosis showed normal muscle, 16 cases with severe ptosis showed excessive fibro-fatty tissue replacing the muscle fibers, the remaining muscle fibers are normal. So, congenital scanty muscle fiber is responsible for ptosis, myopathic changes evident in only one patient. The acquired group showed evident myopathic changes