A 



JOURNAL 



OF 



NATURAL PHILOSOPHY, CHEMISTRY, 



AND 



THE ARTS, 



SUPPLEMENT TO VOL. XXXL 



ARTICLE i. 



Observations and Experiments 'on Vision. By WilliAJ* 

 Charles Wells, i¥. D, F. R. S. * 



L 1 WAS consulted, in the beginning of the year 1809, Uncommon dis- 

 upon a disease of Tision, which, as far as I know, has not^*^^^^ vision, 

 hitherto been mentioned by any author. The subject of it 

 was a gentleman about thirty.five years old, rery tall, and 

 inclining to be corpulent. About a month before I saw 

 him, he had been attacked with a catarrh^ and as this was 

 leaving him, he was seized with a slight stupor, and a feel- 

 ing of weight in his forehead. He began at the same time 

 to see less distinctly than formerly with his right eye, and , 



to lose the power of moving its upper lid. The pupil of 

 the same eye was now also observed to be much dilated. 

 In a few days the left eye became similarly affected with 

 the right, but in a less degree* Such was the account of 

 the case, which I received from ihe patient himself, and 

 from the surgeon who attended him. The former added, 

 that previously to his pre-tnt ailment his sight had always 

 been so good, that he had never used glasses of any kintl 

 to improve it. On examining his eyes myself, I could not 

 discover in them any other appearance of disease, than that 

 their pupils, the right particularly, were much too large^ 



* Phil. Trans, for 1811, p. 378. 

 Supplement— Vol, XXXI. Y and 



