Because of the movement possible in this sense organ and the delicate muscles which control it, there is the possibility of improvement by muscular exercise which does not exist in the other senses. The following exercises will strengthen the eye muscles. They should be practiced by persons of all ages. It has been found during operations that some of the eye muscles have been exercised so little that they have become almost incapable of use. These exercises are simple, and can be practiced at odd moments, that would otherwise be wasted. First--Move the eye horizontally as far as you can to the left and then to the right. Continue this until there is a feeling of fatigue. No physical exercise should be continued beyond that point. Second--Move the eyes vertically as far as you can, up and then down, trying to extend the range of vision. Continue this alternately until you feel fatigue. Third--Roll the eyes from right to left and then from left to right in as large a circle as possible. These exercises will keep the eye muscles in a healthy condition. See to it that the child does not abuse his eyes; that he does not strain them; always has plenty of light and that it falls upon the page, or work, that he is doing. Do not overlook indications of eye trouble, eye pains, inflamed lids, continued recurrence of styes, blood-shot eyeballs, or pain back of the eyes, all should have the attention of a doctor. "A stitch in time saves nine." Strive for More Detail There is the greatest difference in the amount of detail which the eyes of different persons gather from a glance at an object. Some will only see a tree; others in the same time will see a tree with spreading branches, small irregularly shaped leaves, with small black berries and a rough vertically marked bark. Children should be trained to notice as much detail as possible. Development along this line becomes a basis for many other mental operations which will be discussed later on. Exercise for Detail Place yourself with the child where you can look out on the landscape. Pick out some object, tell him what it is, and have him look until he finds it. Then let the child pick out some object that he thinks will be difficult for you to find. It may be a bird, a red flower, or a hoop. As he develops pick objects farther away, smaller or partially hidden. Another Good Exercise