[Subjective measurement of apparent accommodation in pseudophakic eyes with pattern VECPs]

Apparent accommodation was measured subjectively with pattern reversal visually evoked cortical potentials (PVECPs) in 22 pseudophakic eyes (20 patients, 47-83 years of age) after implantation of posterior chamber intraocular lenses. No significant difference was found in the obtained amplitude of accommodation measured with PVECPs between pseudophakic eyes and normal phakic eyes. Moreover this amplitude was independent from the age of patients, corrected visual acuity, or refractive errors. In one case, however, the amplitude of apparent accommodation was reduced with artificial dilating of the pupil diameter and contribution of the depth of focus to the apparent accommodation was indicated.