[Near vision after implantation of monofocal versus multifocal intraocular lenses].
OBJECTIVE
Object of this study was to compare the near visual acuity between eyes with monofocal intraocular lens (MONO) and myopic target refraction in comparison with eyes after refractive multifocal intraocular lens (MIOL) implantation and emmetropic to slight hyperopic target refraction.


METHODS
89 eyes of 83 patients underwent cataract surgery, in 49 eyes a MONO (SI-40NB, Allergan) was implanted, in 40 eyes a refractive MIOL (SA-40N, Allergan). At day 2 after surgery and after 5 months the uncorrected near visual acuity, the near visual aculty with distance correction and with an addition of +3 diopters (D) were determined. The refractive outcome targeted in case of MIOL implantation was emmetropia to slight hyperopia and myopia for the MONO subjects. The eyes with MONO were classified in 4 categories depending on their postoperative refractive error (spherical equivalent, SE): category 1 with SE +1 to > 0 D, category 2 with SE 0 to > -1 D, category 3 with SE -1 to > -2 D and category 4 with a SE -2 to > -3 D.


RESULTS
We found a statistically significant better uncorrected near visual acuity in eyes with MIOL than in MONO subjects for category 1-3. In category 4 there was no statistically significant difference between MONO and MIOL. With best distance correction near visual acuity in MIOL was statistically significant better than in all 4 MONO categories. After adding 3 D, there was no statistically significant difference between the groups.


CONCLUSIONS
Even in case of a myopic target refraction near visual acuity in eyes of the MONO group was statistically significant worse than in the eyes of the MIOL group. Only in case of postoperative SE of < or = -2 D eyes of the MONO group had a near visual acuity similar to the eyes of the MIOL group. This advantage is accomplished with a decrease in the uncorrected distance visual acuity.
Dick
H B
HB
Universitäts-Augenklinik, Langenbeckstr. 1, 55131 Mainz. bdick@mail.uni-mainz.de
Krist
R
R
Schwenn
O
O
Pfeiffer
N
N
D000368:Aged; D000369:Aged, 80 and over; D004215:Distance Perception; D005260:Female; D006801:Humans; D007910:Lenses, Intraocular; D008297:Male; D055095:Optics and Photonics; D011183:Postoperative Complications / Q000209:etiology; D011446:Prospective Studies; D012029:Refraction, Ocular; D014787:Vision Tests; D014792:Visual Acuity