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Pituitary tumors often manifest through their local extension, involving the optic chiasm or the optic nerve and producing subsequent visual field alterations. Bitemporal hemi-anopsia is the most common visual field (VF) lesion in pituitary adenomas. According to tumor size and the degree of involvement of the optic chiasm, a variety of field modifications can occur. In the non-secreting pituitary adenomas patients, these alterations may very well predate the clinical features. The aim of this study was to report ...