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To study the ophthalmic manifestations of patients with allergic fungal sinusitis (AFS) and evaluate the importance of early diagnosis and management in preventing the possible future complications of AFS.Retrospective chart review of 100 patients with the diagnosis of AFS from a single institution was performed. Age, gender, clinical presentation including ophthalmic and radiological findings, immune status, patterns of sinus involvement, medical and surgical intervention needed, laboratory results, and the course of the disease were evaluated.The mean age at presentation was 19.8 years (range, 10–42 years) with no clear gender predominance (52% of patients were female).The most common sinuses involved were ethmoid and maxillary sinuses. All patients underwent functional endoscopic sinus surgery and received systemic and topical steroids. There were no intervention-related complications. Thirty-four of 100 patients had ophthalmic consequences of AFS. The most common ophthalmic presentation was proptosis (n = 21, 61.7%), followed by epiphora (n = 5, 14.7%), visual loss (n = 4, 11.7%), diplopia (n = 3, 8.8%), and dystopia (n = 1, 2.9%) in addition to 1 patient having ptosis beside proptosis. CT scans of these 34 patients showed that 82.3% had nonhomogenous opacification of sinuses, 52% had erosion of lamina papyracea, 17.6% had intraorbital extension, and 8.8% had intracranial extension.Ophthalmologists may be the first who encounter these patients which necessitates familiarity with AFS presentations and complications. In cases of sudden visual loss, early intervention may prevent permanent vision loss. Functional endoscopic sinus surgery and postoperative systemic and topical steroids resulted in dramatic improvement of ophthalmic symptoms and signs.