▁experience ▁hall uc in ations ▁and ▁challeng es ▁the ▁st igma ▁associated ▁with ▁the ▁word . ▁He ▁explained : ▁" H all uc in ations ▁don ' t ▁belong ▁wh olly ▁to ▁the ▁ins ane . ▁Much ▁more ▁commonly , ▁they ▁are ▁linked ▁to ▁sens ory ▁dep riv ation , ▁into xic ation , ▁ill ness ▁or ▁injury ." ▁He ▁also ▁cons iders ▁the ▁less ▁well ▁known ▁Charles ▁Bon net ▁synd rome , ▁sometimes ▁found ▁in ▁people ▁who ▁have ▁lost ▁their ▁eyes ight . ▁The ▁book ▁was ▁described ▁by ▁Entertainment ▁Week ly ▁as : ▁" E leg ant ... ▁An ▁absor bing ▁pl unge ▁into ▁a ▁mystery ▁of ▁the ▁mind ." ▁ ▁S acks ▁sometimes ▁faced ▁criticism ▁in ▁the ▁medical ▁and ▁dis ability ▁studies ▁communities . ▁Arthur ▁K . ▁Sh api ro ▁for ▁instance , ▁an ▁expert ▁on ▁T ou ret te ▁synd rome , ▁said ▁S acks ' s ▁work ▁was ▁" id ios ync r atic " ▁and ▁re lied ▁too ▁much ▁on ▁an ec dot al ▁evidence ▁in ▁his ▁writ ings . ▁Research er ▁Mak oto ▁Yam ag uch i ▁thought ▁S acks ' s ▁mathematical ▁explan ations , ▁in ▁his ▁study ▁of ▁the ▁numer ically ▁gift ed ▁sav ant ▁tw ins ▁( in ▁The ▁Man ▁Who ▁M ist ook ▁His ▁W ife ▁for ▁a ▁Hat ), ▁are ▁irrelevant . ▁Although ▁S acks ▁has ▁been ▁character ised ▁as ▁a ▁" comp ass ion ate " ▁writer ▁and ▁doctor , ▁others ▁have ▁felt ▁that ▁he ▁explo ited ▁his ▁subjects . ▁S