[Intraindividual comparison of higher order aberrations after implantation of aspherical and spherical IOLs depending on pupil diameter].
BACKGROUND
The implantation of aspherical IOLs with negative spherical aberration should equalize the positive spherical aberration of the cornea. The aim of our study was the intraindividual comparison of higher order aberrations (HOA) after implantation of an aspherical and spherical IOL.


METHODS
In ten patients we randomly implanted an aspherical IOL in one eye and a spherical IOL in the other. After 3 months, we used a Hartmann-Shack sensor to measure total HOA, 3rd to 5th order as well as spherical aberration Z4.0, in mydriasis. We compared all aberrations intraindividually for pupil diameters of 3.5-6 mm.


RESULTS
For both IOLs, all aberrations rose with increasing pupil diameter. However, after implantation of the aspherical IOL total HOA, 4th order and spherical aberration Z4.0 were lower, for 4th order aberration and Z4.0 even significantly. For 3rd and 5th order aberrations, there was no difference between both IOLs.


CONCLUSIONS
With implantation of aspherical IOLs, total HOA, 4th order and spherical aberration Z4.0 could be reduced compared to spherical IOLs.
Klinik für Augenheilkunde, Johann Wolfgang Goethe-Universität, Frankfurt am Main.
T
T
Kasper
J
J
Bühren
T
T
Kohnen
D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011446:Prospective Studies; D011680:Pupil / Q000502:physiology; D012029:Refraction, Ocular; D013997:Time Factors