Visual field defects (VFD), typically homonymous superior quadrantanopsias, commonly occur after temporal lobe resections for patients with medically intractable mesial temporal lobe epilepsy (MTLE). The frequency of VFD after open resection ranges from 9 – 100% [1–3]. Techniques that may limit surgical volumes may prevent VFD. Nilsson et al. found that more restricted resections that spared the superior-most aspect of the superior temporal gyrus yielded less VFD [4]. Mengesha et al. found that the horizontal meridian of visual fields tended to be spared with selective amygdalohippocampectomy compared to standard anterior temporal lobectomy (ATL) [5].

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