RANGE OF ACCOMMODATION
\ɹˈe͡ɪnd͡ʒ ɒv ɐkˌɒmədˈe͡ɪʃən], \ɹˈeɪndʒ ɒv ɐkˌɒmədˈeɪʃən], \ɹ_ˈeɪ_n_dʒ ɒ_v ɐ_k_ˌɒ_m_ə_d_ˈeɪ_ʃ_ə_n]\
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By Willam Alexander Newman Dorland
Term used to express the extent of the change in curvature of the crystalline lens that can be effected by a maximum contraction of the ciliary muscle. It is expressed in the number of diopters by which the refractive power of the lens is thus increased. The range of accommodation diminishes steadily with age, according to a definite curve, from 14 diopters at 10 years to 1 diopter at 60 years. [Lat.]
By Smith Ely Jelliffe
Word of the day
- Glaucoma. A greenish reflex in glaucoma; also seen when the pupil is dilated aTid media are not entirely transparent.