Diplopia (double vision)
(a) Binocular
Ocular muscle paralysis
Orbital diseases (thyroid orbitopathy, orbital pseudotumor, orbital tumor, cavernous sinus/superior orbital fissure syndrome, blow-out fracture; enophthalmos, diplopia, anesthesia in infraorbital nerve dermatome and subconjunctival bleeding)
Myasthenia gravis (intermittent)
(b) Monocular
Uncorrected high astigmatism
Corneal opacity or irregularity
Cataract and pupillary abnormalities (wide peripheral iridotomy)
Acute proptosis
orbital pseudotumor
Thyroid orbitopathy
Traumatic orbital hemorrhage
Orbital cellulite
Carotico-cavernous sinus fistula (bilateral)
Cavernous sinus thrombosis (bilateral)
leukemia or lymphoma
Rhabdomyosarcoma or metastatic neuroblastoma (in children)
