[The aspheric blue light filter IOL AcrySof IQ compared to the AcrySof SA60AT : influence of IOL power, pupil diameter, and corneal asphericity on postoperative spherical aberration].
BACKGROUND
The aspheric optic design of intraocular lenses (IOL) aims to minimize postoperative ocular spherical aberration (SA). The effect of a standardized IOL asphericity depends on IOL power, pupil diameter, and corneal asphericity. The impact of these factors was investigated in a comparative study.


METHODS
In a prospective study, 70 eyes with the aspheric blue light filter IOL AcrySof IQ (Alcon) were compared to 36 eyes with the conventional AcrySof SA60AT (Alcon). Six weeks after uneventful phacoemulsification the following parameters were assessed: visual acuity, higher order aberrations, pupil diameter, and corneal asphericity.


RESULTS
The comparison of 42 eyes in a normal dioptric range with the IQ IOL (22.4+/-2.0 D) to 20 eyes with the control lens of similar IOL power (22.0+/-2.7 D) showed no different visual outcome. For a 5-mm pupil SA was calculated at 0.04 (+/-0.05) microm for the IQ IOL and 0.20 (+/-0.06) microm for the AcrySof SA60AT. Also for a 4-mm pupil SA was significantly lower in eyes with the IQ lens. A separate evaluation of 28 eyes which needed very high or low IOL power revealed a similar postoperative SA for the IQ IOL. The greatest difference of SA between the two IOLs was found in hyperopic eyes with higher IOL power. The corneal asphericity (Q value) showed significant correlation to postoperative ocular SA.


CONCLUSIONS
The aspheric AcrySof IQ reduces postoperative SA significantly compared to a conventional IOL even with smaller pupils and independent of IOL power. The assessment of corneal asphericity enables an individual estimation of postoperative SA.
Mester
U
U
Augenklinik der Bundesknappschaft, An der Klinik 10, 66280, Sulzbach, Deutschland. sek-augen@kksulzbach.de
Kaymak
H
H
D019781:Corneal Topography / Q000379:methods*; D019544:Equipment Failure Analysis; D005260:Female; D005374:Filtration / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D007910:Lenses, Intraocular; D008297:Male; D011182:Postoperative Care; D011474:Prosthesis Design / Q000379:methods*; D012030:Refractive Errors / Q000175:diagnosis* / Q000534:rehabilitation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D016896:Treatment Outcome