Book, Paragraph

 1  II,  2 |          to add to the accuracy of vision, are differences of degree.
 2  II,  10|      lodged as a rule in the head. Vision is so placed in all animals.
 3  II,  10|          here maintained. Now that vision, whenever it exists, should
 4  II,  10|       brain is fluid and cold, and vision is of the nature of water,
 5  II,  10|         animals hearing as well as vision is lodged in the region
 6  II,  10|            quarters. The organs of vision are placed in front, because
 7  II,  13|        order to ensure keenness of vision. For had they been covered
 8  II,  13|         then to ensure keenness of vision that the skin over the pupil
 9  II,  13|           have no such keenness of vision. For there is nothing in
10  II,  13| necessarily blunt the sharpness of vision, nature has endowed the
11  II,  13|            about have to use their vision at considerable distances.