APPARATUS, SYSTEMS AND METHODS FOR IMPROVING VISUAL OUTCOMES FOR PSEUDOPHAKIC PATIENTS

摘要

A system and method of characterizing through-focus visual performance of an IOL using metrics based on an area under the modulation transfer function for different spatial frequencies at different defocus positions of the IOL. Also disclosed is a system and method of characterizing through-focus visual performance of an IOL using a metric based on an area under a cross-correlation coefficient for an image of a target acquired by the IOL at different defocus positions of the IOL.

主权项

1. An optical system configured to predict clinical visual performance of an intraocular lens (IOL), the system comprising:
a measurement device configured to acquire a plurality of images of a target including objects with different spatial frequencies and obtain modulation transfer function (MTF) and/or phase transfer function (PTF) at different spatial frequencies for different defocus positions of the IOL in a vision range from the acquired plurality of images, the measurement device comprising:
a processor configured to execute programmable instructions stored in a non-transitory computer storage medium to calculate at least one of:
an area under the MTF (MTFa) for different spatial frequencies for each of the different defocus positions;a cross correlation coefficient (X-cor) for the acquired plurality of images at each of the different defocus positions;a weighted MTF (wMTF) corresponding to the area under the weighted MTF for each of the different spatial frequencies for each of the different defocus positions; ora weighted OTF (wOTF) corresponding to the area under the weighted OTF for each of the different spatial frequencies for each of the different defocus positions; andobtain a correlation with clinical data that predicts the VA at different defocus positions of the intraocular lens (IOL).