1. The process by which the vertebrate eye changes optical power to maintain a clear image (focus) on an object as its distance varies. Accommodation acts like a reflex, but can also be consciously controlled. (wikipedia.org)
2. (Ophthalmology, Physiology)
Adjustment, especially that of the eye for various distances resulting in pupil constriction or dilatation. (biology-online.org)
3. The automatic adjustment of the focus of the eye by flattening or thickening of the lens. (Google dictionary)
Word origin: From Latin accommodātiō (“adjustment, accommodation, compliance”), from accommodō (“adapt, put in order”).