Mobility can be difficult for people with homonymous hemianopsia. This phenomenon is known as bitemporal hemianopsia. Transient homonymous hemianopsia does not necessarily mean stroke. Neglect is not to be confused with hemianopsia. A patient with pituitary adenoma may present with visual field defects, classically bitemporal hemianopsia. Temporary hemianopsia can occur in the aura phase of migraine. The more posterior the cerebral lesion, the more symmetric (congruous) the homonymous hemianopsia will be. Right hemiparesis or hemiplegia, right-sided sensory loss, and right homonymous hemianopsia may manifest as well. Homonymous hemianopsia is another sensory deficit that is sometimes observed in this population. The absence of vision in half of a visual field is described as "hemianopsia". Bitemporal hemianopsia most commonly occurs as a result of tumors located at the mid-optic chiasm.