I te mea he maha ngā pororapa tohutoro rerekē, kāore i te ahurei te pae o tētahi āhuahira i runga i te mata: he uaua tēnei i roto i te paerewa ISO e kī ana "kāore i te whakarite whāiti katoa o te pūnaha tohutoro taururu, ngā rōruru (he paetae me te orure) he rangirua i te pai rawa, ā, kāore i te tino kino."