human
Dublin Quarterly Journal of Science. Speaking of the alteration of form in the lens, he says:--
gpt
Even this must take place on a far greater and more important scale than anatomists have as yet suspected. The change amounts to the addition of a double convex lens of crown glass having a radius of a third of an inch. Anatomists have not as yet discovered a mechanism for changing the shape of the lens sufficient to produce these results. The lens should almost be turned into a sphere, and I know of no ciliary muscles capable of effecting so great a change.