No Room for Doubt 53
superior oblique muscle which is supplied by it is an im portant factor in accommodation. It was further found that when the action of the oblique muscles was pre vented by dividing them, the stimulation of the third nerve produced, not accommodation, but hypermetropia. In all the experiments all sources of error are believed to have been eliminated. They were all repeated many times and always with the same result. They seemed, therefore, to leave no room for doubt that neither the lens nor any muscle inside the eyeball has anything to do with accommodation, but that the process whereby the eye adjusts itself for vision at different distances is entirely controlled by the action of the muscles on the outside of the globe.