1. Patients with quadrantanopia may have difficulty seeing objects in one quarter of their visual field.

患有四象限受损性视野缺失的患者可能难以看清他们视野中四分之一的物体。

2. The doctor diagnosed the patient with quadrantanopia after conducting a visual field test.

医生通过进行视野测试，诊断出患者患有四象限受损性视野缺失。