SOCIETY OF THE UNIVERSITY OF ABERDEEN. 125 



At Aberdeen 

 At Edinburgh j , 



This gives an average of 27 per cent, at Aberdeen and 6 - 5 per cent. 

 at Edinburgh. 



Of 150 policemen examined in the Anthropometrical Laboratory, 

 Anatomical Department, Aberdeen University, in 7i per cent, of their 

 eyes was myopia present. 1 



From these and other statistics it is apparent that myopia in- 

 creases with the length of school life, and although it seems that the 

 eyesight of Aberdeen students compares favourably with that of the 

 students in the universities referred to, it must be noted that the 

 average age at which the Aberdeen student was examined might have 

 been somewhat less than that of the other students, the ages of the 

 Aberdeen students being mostly between sixteen and twenty-four, 

 but the greater number between seventeen and nineteen. If this 

 were so, then with a smaller average age a smaller proportion of 

 myopes would be expected. 



The following table shows the comparison of acuteness of vision, 

 after correction of refractive errors, in the various forms of refraction. 



Percentage of the 

 Number, respective refractions. 



Hypermetropic eyes with normal vision after correction 390 92-4 



Myopic eyes with normal vision after correction - 126 84-0 



Mixed astigmatic eyes with normal vision after correction 39 86'7 



The above table shows that in hypermetropia the proportion of those 

 with normal vision, after the error of refraction had been corrected by 

 suitable lenses, was larger than that in the other abnormal forms of 

 refraction. 



SIZE OF PUPIL. 



During the measurement of the size of pupil each student stood 

 metres from the Snellen's types and looked towards them. The pupil 



1 Transactions of the Buvhan Field Club, vol. v. 



