Characteristics of intraocular bleeding and its management in association with blood dyscrasias are discussed. We present a patient with massive bilateral choroidal hemorrhage secondary to Glanzmann's syndrome. Magnetic resonance imaging and ultrasonographic findings were ordered. During the clinical course, bilateral intravitreal hemorrhage and tractional retinal detachment occurred. Left pars plana vitrectomy was performed under general anaesthesia. The procedure was unsuccessful because of intraoperative uncontrolled bleeding.