·AIM:To diagnose early pituitary adenoma by analyzing central visual field,peripheral visual field and head iconography in glaucoma.·METHODS:Seven cases of primary glaucoma with early pituitary adenoma,acute angle-closure glaucoma in 2 cases,chronic angle-closure glaucoma in 1 case and open angle glaucoma in 4 cases were retrospectively analyzed.Visual field of central and peripheral area,X-ray photograph of the head,computed tomography(CT)or magnetic resonance imaging(MRI)of the head were performed in all cases.·RESULTS:Beyond glaucomatous scotoma,supratemporal quadrant visual field defect was found in all cases and pituitary adenoma was revealed by the head iconography.·CONCLUSION:Visual field impairment may occur in both glaucoma and pituitary adenoma.At the early stage,the impairment locates at central area in the former while at peripheral area in the latter.The visual field on central and peripheral area should be checked in glaucoma patient to avoid the missed diagnosis or misdiagnosis of pituitary adenoma.·