IOI or orbital pseudotumor is the second most common cause of exophthalmos following Grave’s orbitopathy and the third most common orbital disorder following thyroid orbitopathy and lymphoproliferative<unk>  accounting for 5–17.6% of orbital disorders, There is no age, sex, or race predilection, but it is most frequently seen in middle-aged individuals. Pediatric cases account for about 17% of all cases of IOI.
Idiopathic orbital inflammatory disease
Orbital lymphoma
Orbital cellulitis
Neurotrophic keratitis
Ocular ischemic syndrome
Phacolytic glaucoma
Acute hemorrhagic conjunctivitis
Intraocular lymphoma