BRADLEY, ARTHUR;KOLLBAUM, PETE S.;THIBOS, LARRY N.
发明人:
BRADLEY, ARTHUR,KOLLBAUM, PETE S.,THIBOS, LARRY N.
申请号：
CA2771825
公开号：
CA2771825C
申请日:
2010.08.30
申请国别(地区):
CA
年份:
2018
代理人:
摘要：
This invention describes strategies and devices for improving the visualexperience whileexpanding the depth of field of presbyopic and pseudophakic patients. Theinvention describesstrategies and devices for providing improved image quality and improvedvisual quality ofpatients employing simultaneous vision bifocal, trifocal or multifocalcorrections or monovision.The invention describes strategies and devices for reducing the visibility ofthe defocused part ofthe retinal image generated by simultaneous vision bifocal and multifocalophthalmic correctionsand monovision. The invention describes strategies and devices that employcontrol of sphericalaberration or other similar asphericities to reduce the visibility ofdefocused ghost images. Theinvention describes strategies and devices that ensure that negative defocusis always coupledwith negative spherical aberration (or similar asphericity), and that positivedefocus is alwayscoupled with positive SA (or similar asphericity) as a means to reduce thevisibility of defocusedghostimages.
