10 
Mr. Home’s Lecture on the Power of the Eye , 
hospital, before a number of spectators, some doubts might be 
entertained whether they had been removed. 
From the experiments which have been stated, it appeared to 
Sir Henry Englefield, that Miles’s eye was not deprived of 
its power of adjustment ; and, by whatever circumstances my 
own judgment might be deceived, or rendered partial, there was 
nothing by which his could be biassed, as he could have no 
object in view, but the promotion of science. His knowledge 
of optics, and his habit of making experiments, are the best 
pledges of these having been as accurately performed as the 
nature of the subject admits of ; for, certainly, the sources of 
fallacy, in optical experiments, are numerous. Those that have 
been related, to be made with perfect accuracy, should be tried 
upon the eye of a person skilled in optics, and accustomed to 
such experiments ; and whose eye had been deprived of the 
crystalline lens, without having received the slightest degree of 
injury in any of its other parts. 
The experiments were instituted in the Isle of Wight, which 
prevented me from requesting several of my friends to be pre- 
sent at them, whose knowledge of the subject would have made 
me desirous of their assistance. 
Haller mentions the case of a nobleman, from whose eye 
the crystalline lens had been extracted, who used glasses, and 
could see with them objects at different distances. As this was 
an observation made upon a particular friend of his own, and 
as he refers to Pemberton, who mentions a case of depressed 
crystalline lens, in which no such effect took place, it is natural 
to suppose, that he had given considerable attention to the 
subject; and that, although the experiments he instituted are 
