Accommodation and Convergence
The accommodation is a reflex action of the eye, in response to focusing on a near target, then looking at a distance target (and vice versa), comprising coordinated changes in vergence, crystal lens shape and pupil size. Convergence is a vergence adduction movement that increase the visual angle to permit single binocular vision during near viewing. Convergence can be voluntary but need not be no near stimulus need be present to elicit vergence. It is also reflexive and a co-movement in the near response.
- Von Noorden GK. Binocular Vision and Ocular Motility: Theory and Management of Strabismus. Mosby, 2002.Google Scholar