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