Patent ID: 8764191

Claim:
A system for characterizing the optical quality and the pseudo-accommodation range of multifocal means used for correcting visual defects, applicable to bifocal, multifocal or progressive intraocular lenses or contact lenses, multifocal ablation or other multifocal configurations, integrating means for projecting an image of a point light source on a retina of a patient through a collimated light beam, and means for directly recording the light reflected, included in a light beam reflected from said retina, in said retina following double passage of the light through ocular means of the patient, comprising a focus corrector device in the illumination path, wherein the system comprises a first focus correction device inserted in the path of the collimated light beam guided towards the retina and a second focus correction device inserted in the light beam reflected from the retina to be guided towards the mentioned recording means, each of said first and second focus correction devices having independent control means for controlling operation of an associated one of the first and second focus correction devices, such that existence and independence of the independent control means for both the first and second focud correction devices allow focusing the point light source on the retina of the patient through any of the focal points of the multifocal means and introducing any defocus in the recording path at the same time.