172 SENSORIAL FUNCTIONS. 



much more interesting than Chesselden's, and described 

 more in detail, was laid before the Royal Society of Lon- 

 don, in 1826, by Mr. Wardrop, a celebrated oculist. This 

 was the case of a lady born blind, but who received her 

 sight at the age of forty-six, by the formation of an arti- 

 ficial pupil. 



518. After a third operation, which Mr. Wardrop per- 

 formed for the artificial pupil, she returned from his house 

 in a carriage, with her eye covered only with a loose 

 piece of silk. The first thing she noticed was a hackney- 

 coach passing by, when she exclaimed, " What is that 

 large thing that has just passed by ?" In the course of 

 the evening, she requested her brother to show her his 

 watch, w^hich she looked at for some time, holding it 

 close to her eye. She w^as asked what she saw, to which 

 she answered, that " there was a dark and a bright side ;" 

 she pointed to the hour of twelve, and smiled. Her 

 brother asked her if she saw anything more ; she replied, 

 "Yes," and pointed to the hands of the watch. She then 

 looked at the chain and seals, and observed that one of 

 the seals was bright, which was the case, being a solid 

 piece of rock-crystal. 



519. On the third day she observed the doors on the 

 opposite side of the street, and asked if they were red ; 

 they were of an oak color. In the evening she looked at 

 her brother's face, and said she saw his nose ; he asked 

 her to touch it, which she did ; he then slipped a hand- 

 kerchief over his face, and asked her to look again, when 

 she playfully pulled it off. 



520. On the thirteenth day of the operation, she walked 

 out with her brother in the streets of London, when she 

 distinctly distinguished the street from the foot-pavement, 

 and stepped from one to the other like a person accustom- 

 ed to the use of the eyes. 



521. " Eighteen days after the operation," says Mr. 

 Wardrop, " I attempted to ascertain, by a few experi- 

 ments, her precise notions of color, size, and forms, posi- 

 tions, motions, and distances of external objects. As she 

 could only see with one eye, nothing could be ascertained 

 respecting the question of double vision. She evidently 

 saw the difference of colors ; that is, she received, and 

 was sensible of different impressions from different col- 



