Pseudoaccommodation is increased depth-of-focus in a pseudo-phakic eye beyond that predicted by the optical properties of the intraocular lens (IOL). Also described as "apparent accommodation," pseudoaccommodation is attributed to the static optical properties of the pseudophakic eye independent of ciliary muscle actions on the IOL.1'2 These properties include pupil size, astigmatism, and corneal and IOL wavefront aberrations.3"9 Pseudoaccommodation is separate from pseudophakic accommodation, which describes the dynamic change in the refractive state of the eye caused by the forward movement of the IOL/ bag complex. Both pseudoaccommodation and pseudophakic accommodation may ultimately contribute to the ability of some pseudophakic eyes to possess good near visual acuity with distance correction. Based on the understanding of inherent pseudoaccommodation, several corneal and lenticular refractive procedures have been developed to help correct presbyopia, including corneal laser and inlay surgeries as well as pseudoaccommodative IOL technology in lens-based surgery.
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