I dont see why humans have such short eyesight (even in daylight) ive spent many missions geting gunned down as i exit my dropship by enemies concealed by the fog of war. im sure there is a reason for this but it seem unrealistic and gives aliens an advantage they shouldnt have over humans, expecialy when they out number, out range and out gun you... (reptiles for example generaly have poor eyesight but in this the xeno equivalint can see further than a veteran sniper....)