368 Report of the Committee on Colour-Vision. 



APPENDICES. 



Appendix I. 



Statistics of Colour-blindness. 



The following" schools and institutions were examined by the 

 Committee of the Ophthalmological Society of London : — 



Westminster School. 

 Eton. 



King's College School. 

 University College School. 

 Christ's Hospital (Blue Coat 



School). 

 Merchant Taylors' School. 

 Friends' School, Saffron Walden. 

 „ ,, Scarborough. 



„ York. 

 ,, ,, Ackworth. 



„ „ Didcot. 



Ley's School, Cambridge. 

 Royal Medical Benevolent Col- 

 lege, Epsom. 

 City of London School. 



Jews' School, Greek Street, 

 Soho. 



Duke of York's School. 

 Foundling Hospital. 

 Haverstock Orphan Asylum. 

 Hanwell Lunatic Asylum. 

 Fulbourne Lunatic Asylum. 

 Deaf and Dumb Schools, Kent 



Road. 

 Metropolitan Police. 

 Royal Naval School, Greenwich 

 St. Thomas's Hospital Medical 



School. 

 Coldstream Guards. 

 Beddington Orphan Asylum. 

 Various Schools in Dublin. 



Jews' School, Bell Lane. 



It will be observed that some of the foregoing institutions 

 would supply subjects derived from special classes of persons, 

 such as Jews and deaf-mutes; while others would be fairly 

 representative of the whole community. The examinations were 

 conducted by Holmgren's method, supplemented, in some 

 instances, by the use of coloured lights, and the examiners, 

 sixteen in number, were all of them surgeons engaged in 

 ophthalmic practice. The Committee introduced their Report by 

 the following prefatory observations : — 



"Your Committee becomes more and more convinced that a 

 competent examiner is not made in a day, or even in a month, 

 and that, even with large experience, much judgment and 

 capacity are needful to interpret rightly the acts of the examined. 

 This necessity is perhaps most strongly exhibited in the case of 

 intelligent persons who are incompletely colour-blind. Such 

 persons, though they may have a much feebler appreciation of 

 the difference between red and green, for example, than is 

 normal, may, after accurate observation and comparison, separate 

 the red skeins of wool from the green. When tested, however, 

 at various distances with coloured lights, their defects are 

 strikingly apparent, and it becomes clear that they are totally 

 unfitted for responsible posts in which rapid appreciation of 

 colour at a distance is required. 



" Colour-blindness is here taken as implying a defective recog- 

 nition of the difference between colours. No account is taken of 



