Optical and visual performance of diffractive intraocular lens implantation after myopic laser in situ keratomileusis.
OBJECTIVE
To evaluate the optical and visual quality in eyes with diffractive intraocular lenses (IOLs) after myopic laser in situ keratomileusis (LASIK).


METHODS
Fernández-Vega Ophthalmological Institute, Oviedo, Spain.


METHODS
The best corrected visual acuity (BCVA [distance]) at 12.5%, 25.0%, and 100% contrasts under photopic and mesopic conditions; best distance-corrected near acuity; corneal total higher-order aberrations (HOAs); and optical quality by modulation transfer function (MTF) were measured after myopic LASIK in eyes with a spherical AcrySof ReSTOR SN60D3 IOL or an aspheric Acri.LISA 366D IOL and phakic eyes (control).


RESULTS
Under photopic conditions at 100% contrast, the BCVA was 0.1 logMAR or better in all groups. At 25.0% and 12.5% contrasts, there were no statistically significant differences between the aspheric IOL group and the spherical IOL or control group (P >.01). The control group had better BCVA than the spherical IOL group (P = .0002, 25.0%; P<.0001, 12.5%). Under mesopic conditions, the aspheric IOL group had better BCVA than the spherical IOL group at all contrasts (P<.01). There was no statistically significant difference between the 2 IOL groups in mean best distance-corrected near acuity or between all 3 groups in HOAs (P >.01). With 6.0 mm and 3.0 mm pupils, there were no statistically significant differences in MTF between the aspheric IOL group and the control group; both groups had better MTF than the spherical IOL group with a 6.0 mm pupil (P<.01).


CONCLUSIONS
After LASIK, the aspheric IOL provided better visual quality and optical quality than spherical IOL under mesopic conditions (large pupil).
Fernández-Vega
Luis
L
Fernández-Vega Ophthalmological Institute, Surgery Department, School of Medicine, University of Oviedo, Oviedo, Spain.
Madrid-Costa
David
D
Alfonso
José F
JF
Montés-Micó
Robert
R
Poo-López
Arancha
A
D000368:Aged; D002386:Cataract / Q000209:etiology; D015350:Contrast Sensitivity / Q000502:physiology; D005260:Female; D006801:Humans; D020731:Keratomileusis, Laser In Situ; D054018:Lasers, Excimer / Q000627:therapeutic use*; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D018918:Phacoemulsification; D011446:Prospective Studies; D011474:Prosthesis Design; D019591:Pseudophakia / Q000503:physiopathology*; D014792:Visual Acuity / Q000502:physiology*