on Muscular Motion. 
*5 
appears to be confirmed by the case of a patient, from whom I 
had extracted the crystalline lens. This man, at first, saw ob- 
jects double, in a manner which extremely distressed him ; 
but, after some months, acquired the habit of neglecting to 
employ the imperfect eye, and no longer found any incon- 
venience. 
The different degrees of squinting appear to be in proportion 
to the imperfection in the vision of the eye, and, in some in- 
stances, the person is capable of seeing distant objects with 
both eyes, and only squints when looking at near ones. The 
following case is of this kind. 
A young lady, twenty-three years of age, has been observed 
to squint from her infancy ; this has not been considered by 
her friends as the consequence of any defect in her eyes, but 
as arising from the cradle in which she lay having been so 
situated, with respect to the light, as to attract her notice in 
one particular direction, so much as to occasion a cast in one 
eye. Her eyes are apparently both perfect; when she looks 
with attention at an object some yards distant she has no 
squint, but if her eyes are not-engaged by any object, or a 
very near one, she squints to a considerable degree. 
Upon being asked if she saw objects distinctly with both 
eyes, she said certainly, but that one was stronger than the 
other. To ascertain the truth of this, I covered the strong 
eye and gave her a book to read ; to her astonishment, she 
found she could not distinguish a letter, or any other near ob- 
ject. More distant objects she could see, but not distinctly. 
When she looked at a bunch of small keys in the door of a 
bookcase, about twelve feet from her, she could see the bunch 
of keys, but could not tell how many there were. 
