Table 4

Common causes of ptosis

Mechanical
  • Levator aponeurosis dehiscence (so-called senile ptosis)

  • Dermatochalasis

  • Orbital, lid and lacrimal gland tumours

Neurological
  • Third nerve palsy

  • Miller Fisher syndrome

  • Horner's syndrome

Neuromuscular junction
  • Myasthenia gravis

  • Botulism (including iatrogenic from botulinum toxin injections)

Myopathies
  • Myotonic dystrophy

  • Chronic progressive external ophthalmoplegia

Trauma