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The amplitude of accommodation declines from about 14 D at age 10 to about 0.5 D at age 60 (although the measured value is usually higher due to the depth of focus of the eye).See minus lens method; push-up method.astigmatic accommodation Postulated unequal accommodation along different meridians of the eye attributed to a differential action of the ciliary muscle which would lead to a difference in the curvature of the surfaces of the crystalline lens along different meridians. meridional accommodation.closed-loop accommodation Accommodation response to visual stimuli in normal viewing conditions.In man (and primates), this adjustment is brought about by a change in the shape of the crystalline lens.In some animals this adjustment occurs either as a result of an anteroposterior movement of the crystalline lens, or of an alteration in the curvature of the cornea.See open-loop accommodation.components of accommodation The process of accommodation is assumed to involve four components: reflex, vergence (convergence), proximal and tonic accommodation (also called resting state of accommodation).See convergence accommodation; proximal accommodation; reflex accommodation; resting state of accommodation.consensual accommodation Accommodation occurring in one eye when the other eye has received the dioptric stimulus.convergence accommodation 1.
Changes during accommodation: (A), contraction of ciliary muscles; (B), approximation of ciliary muscles to lens; (C), relaxation of suspensory ligament; (D), increased curvature of anterior surface of lens.4 (in sociology) the reciprocal reconciliation of conflicts between individuals or groups concerning habits and customs, usually through a process of compromise, arbitration, or negotiation. Occupational medicine The changes made by a person or organisation to a workplace to allow a person with disabilities to work there.These three actions constitute the accommodation reflex.The ability of the eye to accommodate decreases with age.However, this change in accommodative demand is accompanied by a similar change in convergence, so that a myope transferring to contact lenses accommodates and converges more than with spectacles and the reverse applies for a hyperope. See far point sphere.ill-sustained accommodation See accommodative insufficiency.inert accommodation See accommodative infacility.insufficiency of accommodation See accommodative of accommodation 1.
See correction induced point of accommodation A point in space conjugate with the retina (more specifically the foveola) when the accommodation is relaxed. The amount by which the accommodative response of the eye is less than the dioptric stimulus to accommodation, as usually occurs when fixating an object at near. The condition occurring in dynamic retinoscopy in which the neutral point is situated further from the eyes than is the retinoscopic target.Synonym: ocular accommodation; visual accommodation See: illustration4.In the learning theory of Jean Piaget, the process through which a person's schema of understanding incorporates new experiences that do not fit existing ways of understanding the world. Fringe ophthalmology Near and far focusing—an exercise in Bates vision training, which consists of changing the point of focus from near to far distances multiple times.