In all cases, the difference of visual sharpness between {TAIL ~ the two eyes} is sufficiently reduced, from 5% to 10%, to maintain the function of {HEAD ~ visual binocularity} 
In all cases , the difference of visual sharpness between { TAIL ~ the two eyes } is sufficiently reduced , from 5 % to 10 % , to maintain the function of { HEAD ~ visual binocularity }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD