Comparison of reading performance after bilateral implantation of multifocal intraocular lenses with +3.00 or +4.00 diopter addition

Abstract

Although the 2 IOL groups had similar performance in reading parameters, patients had to adjust to their best reading distance. The +3.00 D IOL performed better than the +4.00 D IOL at 40 cm.

Modulation transfer function and optical quality after bilateral implantation of a +3.00 D versus a +4.00 D multifocal intraocular lens

“…This multifocal IOL has the same symmetric biconvex design and anterior aspheric optic but a lower addition (add). Findings in previous studies [8][9][10][11][12][13][14][15] provide evidence that the C3.00 diopter (D) add version yields better intermediate vision and a more comfortable reading distance than the C4.00 D add version.…”

“…2-8 Previous studies [8][9][10][11][12][13][14][15] report that the Acrysof Restor SN6AD1 aspheric multifocal IOL with a C3.00 D add provided better vision at intermediate distances than the multifocal IOL with the same platform but the higher add of C4.00 D (Acrysof Restor SN6AD3). To determine whether the lower add improves intermediate vision at the expense of optical quality, we analyzed 3 indicators of optical quality; that is, spherical aberration, the PSF, and the MTF.…”

“…This multifocal IOL has the same symmetric biconvex design and anterior aspheric optic but a lower addition (add). Findings in previous studies [8][9][10][11][12][13][14][15] provide evidence that the C3.00 diopter (D) add version yields better intermediate vision and a more comfortable reading distance than the C4.00 D add version.The aim of this study was to determine in vivo whether the improvement in intermediate vision after bilateral implantation of the aspheric multifocal IOL ARTICLE with a C3.00 D add occurs at the expense of optical quality compared with that after bilateral implantation of the aspheric multifocal IOL with a C4.00 D add. To our knowledge, this is the first study to use in vivo analyses of optical quality parameters, such as the modulation transfer function (MTF) and point spread function (PSF) (expressed as the Strehl ratio), in patients with the C3.00 D add Acrysof Restor SN6AD1 IOL.…”

“…In addition, the center-most region of the 3.6 mm area is larger than in the C4.00 D add version (0.856 mm versus 0.742 mm), creating bifocality from near to far and providing C3.00 D near add at the lens plane. [8][9][10][11][12][13][14][15] Immersion ultrasound biometry (Ocuscan RxP, Alcon Laboratories, Inc.) was performed in all cases by the same experienced examiner. All eyes were targeted for emmetropia.…”

Preoperative automatic visual behavioural analysis as a tool for intraocular lens choice in cataract surgery

“…Several studies have been performed to evaluate the best multifocal IOL diopter addition (20) . However, knowing the distance at which the patient executes most of his/her daily tasks, i.e., the patient's visual behavior, is critical for choosing an optimal IOL (27)(28)(29) . Through this unprecedented study, besides achieving a detailed medical history, we were able to add information regarding the type of patient activities performed throughout an entire day; distance estimates of patient sight; and estimates of the proportions of near, intermediate, and far sight.…”