Validity of autorefraction after cataract surgery with multifocal ReZoom intraocular lens implantation

Abstract

Although autorefraction showed excellent agreement with subjective refractive astigmatism, correlation with spherical values was poor, with a trend toward more negative values. Autorefraction after ReZoom IOL implantation can be used as a good starting point for subjective refraction of astigmatism; however, spherical values should be underestimated.

Assessment of multifocal contact lens over-refraction using an infrared, open-field autorefractor: A preliminary study

“…Consequently, the accuracy and precision of the autorefractor measurements in MCL over-refraction is comparable to MIOL over-refraction. On the other hand, Muñoz et al [16] found mean differences of −1.00 ± 0.61D and statistically significant differences when measuring a refractive MIOL, a result that differs from the measurements performed in this preliminary study and from Bissen-Miyajima's data. Muñoz et al argued that these differences were caused by the geometry of the IOL they used (refractive multifocal ReZoom ® , Abbott Medical Optics, Inc.), which can interfere with the infrared beam of the autorefractor.…”

“…Finally, in astigmatic vectors the differences found were not statistically significant for all MCL considered together and when the different MCL were analyzed. The results with MCL are in good agreement with the results obtained by other authors [15,16] that used autorefraction in patients with MIOL and who found mean differences close to zero and good Pearson's correlation coefficients. Moreover, when comparing the performance of the autorefractor with and without MCL, the results can be considered similar.…”

“…However, not all authors report problems when measuring aberrations in MCL [13] and objective accommodative responses have been successfully measured using an autorefractor [14]. Moreover, autorefraction has also been used after cataract surgery in patients with MIOL [15,16]. No comprehensive studies on the evaluation of autorefractors as a screening method for MCL over-refraction have been published.…”

Autorefraction after implantation of diffractive multifocal intraocular lenses

“…9 Refractive IOLs provide multifocality by changing the IOL refraction based on pupil size. Autorefraction is measured with infrared light reflected through small apertures.…”

“…Examination of eyes with a refractive multifocal IOL using autorefraction show low accuracy. 9 The usefulness of autorefraction as a starting point for autorefraction in eyes with a diffractive multifocal IOL has been reported. 10 However, the reliability of autorefractometry for diffractive multifocal IOLs has not been precisely reported.…”