Original sentence: Bates did not present central fixation as an exercise, or as a habit to be directly learned, as it is often portrayed.Beyond asserting that it was a "symptom of strain", Bates did not provide any empirical evidence that his theory of central fixation was responsible for the blurriness reported by his patients, nor did he suggest any physiological mechanism by which it occurred.The mechanism of central fixation was only discussed in vague psychological terms: "One part of an object is seen best only when the mind is content to see the greater part of it indistinctly, and as the degree of relaxation increases the area of the part seen worse increases, until that seen best becomes merely a point
Edited sentence: "One part of an object is seen best only when the mind is content to see the greater part of it indistinctly, and as the degree of relaxation increases the area of the part seen worse increases, until that seen best becomes merely a point.Bates did not present central fixation as an exercise, or as a habit to be directly learned, as it is often portrayed as