Sentence:  It seems clear , when one takes into consideration the exceedingly defective eyesight of the patient ( we shall describe it in detail in connection with our second question , the one concerning the psychical blindness of the patient ) , that he had to rely on his sense of touch much more than the usual portfolio maker and that consequently that faculty was most probably more sensitive to shape and size than that of a person with normal <WSD>vision</WSD> . 
Meaning of the word marked with <WSD> tags:  the ability to see; the visual faculty