VISION. 231 



Have the color-perimeters the same general form 

 as the light-perimeter? If not, describe any noticea- 

 ble variations. Which of the color-perimeters incloses 

 the greatest area? Enumerate them in order of area. 

 Is this the order which one would expect? Give 

 grounds for position. 



(7) Take corresponding perimeter for the other eye. To 

 use the same blackboard it will be necessary to turn it 

 the other edge up. In what general respect do the 

 perimeters of the right eye differ from those of the 

 left? 



(8) With the help of the light or form-perimeters of 

 the right and left eyes, determine the field of binocular 

 vision. Is this the field of binocular direct vision or 

 binocular indirect vision ? 



