SOCIETY OF THE UNIVERSITY OF ABERDEEN. 



123 



The following table gives the number of individuals with hyper- 

 metropia, emmetropia, myopia or mixed astigmatism in both eyes, and 

 the number of individuals with anisometropia : 



Number. Percentage. 



Individuals with both eyes hypermetropic 173] 43-i 



Individuals with both eyes emmetropic 60 j~" 15 ( 



Individuals with both eyes myopic 60 15'0 



Individuals with both eyes mixed astigmatic - 11 2-75 



Individuals with anisometropia - 96 24-0 



When the refraction of the right eye was compared with that of 

 the left, 



Hypermetropia was present in 217] - (right eyes and in 205] - - ("left eyes. 

 Emmetropia was present in 85 / . - . [right eyes and in 98 j . . . \left eyes. 

 Myopia was present in 73 right eyes and in 77 left eyes. 

 Mixed astigmatism was present in 25 right eyes and in 20 left eyes. 



The above table shows little difference in the frequency of each 

 of the different forms of refraction in the right eye compared with 

 that of the left. 



The following table shows the relation between refraction and 

 locality, giving the comparison of the prevalence of each of the 

 different forms of refraction in students coming from town and in 

 those from country districts. A town was here reckoned a place 

 of over 5,000 inhabitants. 



Myopia is found from the above table to be 1'4 times more fre- 

 quent in students coming from town than in those from country 

 districts. 



