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Clinical experience in aspheric IOLs ‐ a review of the world literature
Author(s) -
LIU C
Publication year - 2008
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2008.6433.x
Subject(s) - spherical aberration , redress , tilt (camera) , optometry , lens (geology) , medicine , optics , balance (ability) , ophthalmology , cornea , physics , engineering , art , mechanical engineering , literature , physical medicine and rehabilitation
Abstract The natural crystalline lens continues to grow throughout life. In early adult life, the asphericity of the cornea and the lens more or less cancel each other out. Later in life, this balance is lost and older subjects experience poorer quality vision. During cataract surgery, there is an opportunity to redress this balance, or at least not add to the problem of positive spherical aberration by implanting IOLs with aspheric optics. Results from the emerging literature suggests that patients do have higher quality vision, including when an aspheric mulitfocal IOL such as the Alcon ReSTOR SN6AD3 is used. However, there may be problems with IOLs with deliberate negative spherical aberrations if decentration and tilt should occur. Also, the approach is one size fits all, and is not tailored to the optics of individual eyes. There is a great variation in corneal spherical aberrations in normal individuals.