Aberration and contrast sensitivity comparison of aspherical and monofocal and multifocal intraocular lens eyes

Abstract

Although the multifocal IOL can provide near vision, it can increase higher-order aberration and negatively influence contrast sensitivity. However, the aspherical IOL can reduce aberration and improve contrast sensitivity as compared with the monofocal IOL.

Corneal aberrations after microincision cataract surgery

“…Both improve contrast sensitivity compared with that with monofocal IOLs. 13 Newer aberration-and wavefront-corrected IOLs, especially those with a prolate anterior surface, can eliminate spherical aberration in the average normal eye and reduce total optical spherical aberration in more than 90% of patients presenting for cataract surgery. [22][23][24] Thus, it is important to neutralize the effect of the corneal incision on corneal aberrations.…”

Internal spherical aberration by ray tracing-type aberrometry in multifocal pseudophakic eyes

“…In practice, aberration and contrast sensitivity of multifocal lenses are worse than those of monofocal IOLs. 4,21 Because of the splitting of entering light, glare and night halos are frequent in multifocal IOLs. 22 We can also deduce that splitting light makes aberrometer analysis more challenging, because such analysis computes reflected rays shot into the eyes by separating beams.…”

“…1 The modification of IOL asphericity has been a key focus of IOL development, as adjusting the asphericity of the IOL to corneal spherical aberration (SA) can result in a decrease of total aberration. [2][3][4][5][6] Aberration is the phenomenon by which an image becomes distorted when the lens cannot completely concentrate incoming rays of light into a single focus. Without compensation of positive corneal SA, the rays of light will fail to focus onto a single spot of the retina and will result in a distortion of the image and compromise of contrast sensitivity.…”

Cost-Effectiveness Comparison Between Monofocal and Multifocal Intraocular Lens Implantation for Cataract Patients in Taiwan

“…The results indicated that the patients receiving multifocal IOLs achieved a best-corrected visual acuity (BCVA), had less restrictions of visual performance, spectacle independence, and increased QOL. 12 In 2007, Zeng et al 13 conducted a study comparing the differences in aberration and contrast sensitivity (CS) in 124 patients after cataract surgery and implantation of aspheric, multifocal, or monofocal IOLs and showed that multifocal IOLs improved near vision, led to increased high-order aberrations, and reduced CS. The results suggested that aspheric IOLs were more effective in decreasing aberrations and improving CS.…”

“…The results suggested that aspheric IOLs were more effective in decreasing aberrations and improving CS. 13 In addition, Tzelikis et al 14 explored the outcomes of aberration and CS in 25 cataract patients implanted with aspherical or spherical IOLs after binocular cataract surgery in 2008. The effectiveness of different IOLs implanted in patients receiving the same IOLs in both eyes was evaluated and compared.…”