摘要INTRODUCTION Eye tumors can show diverse clinical signs.They can be misdiagnosed as glaucoma because of red eye,pain,severe headache,elevated intraocular pressure (IOP),even adhesion of the angle of the anterior chamber.In a study by Shields et al.,[1] 58 in 144 (40％) of patients with iris melanoma were diagnosed as glaucoma on their initial visit.However,special clinical characteristics,ophthalmic examination,and imaging technology can assist in making the right diagnosis.Ultrasound examinations,high-resolution ultrasound biomicroscopy (UBM),fluorescein angiography,optical coherence tomography,computerized tomography (CT),magnetic resonance imaging (MRI),and fine-needle aspiration biopsy are technologies that may help with early tumor detection.In this study,we highlighted the importance of correctly diagnosing tumor-related glaucoma through the review of nine cases that were initially misdiagnosed as glaucoma.