[Significance of aniseikonia following implantation of posterior chamber lenses].

Posterior chamber lenses with angled haptics were implanted in one eye of each of 53 patients with senile cataract. Dioptric aniseikonia was calculated between 1 month and 24 months after surgery (with Gruber's and Huber's computer program) on the basis of most recently obtained values (bulb axis length, depth of the anterior chamber, lens thickness, necessary refraction), and compared with subjective measurements taken with the phase difference haploscope. The agreement between the calculated and subjective aniseikonia was greatest when tested in a vertical meridian. However, it was not possible to predict any correlation between dioptric and subjective aniseikonia with confidence. On the basis of the test results it seems justified to aim for a minimal refractive error in the pseudophakic eye of about +/- 0.5 D in patients with hypermetropia or myopia up to 4 D, even if subjective aniseikonias of over 10% can be proved. The latter manifest great meridional differences and hardly interfere with binocular single vision.