Accommodation, the ability of the lens of the eye to adjust itself for viewing near or distant objects. For distance vision, the pupils of the eye bicome large, the lens flattens, and they direct away from each other. The prcess is reversed for close vision. After obout the age of 40, the lenses begin to harden and the ability of the eye to accommodate diminished. Special glasses may be required for close vision. Glasses may be fitted with bifocals (two lenses in one) or trifocals (three lenses in one) to help a middle-aged or older person accommodate his vision.
Tidak ada komentar:
Posting Komentar