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. 2018 Aug 3;8(1):11686.
doi: 10.1038/s41598-018-30141-1.

Diffractive multifocal intraocular lens implantation in eyes with a small-diameter pupil

Masayuki Ouchi  1   2 , Takuya Shiba  3
Affiliations

Diffractive multifocal intraocular lens implantation in eyes with a small-diameter pupil

Masayuki Ouchi et al. Sci Rep. .

Abstract

Postoperative outcome of diffractive multifocal intraocular lens (MIOL) implantation in eyes with a small-diameter pupil was evaluated. This non randomized case series involved 23 eyes of 23 patients who underwent diffractive MIOL implantation and whose preoperative photopic pupil diameter was ≤3.0 mm [small-diameter pupil (SDP) group], and 79 eyes of 79 patients implanted with the same MIOL whose pupil diameter was >3.0 mm as controls (LDP group). Contrast sensitivity of high spatial frequency (12, and 18 cycle per degree) and both 12.5% and 6% low-contrast visual acuity (VA) were significantly worse in the SDP group than in the LDP group (P = 0.04, 0.05, 0.05, 0.03). However, no significant difference was found between eyes in the SDP group with a postoperative pupil diameter greater than 3.0 mm and LDP group eyes. No significant differences were found in uncorrected and corrected distance VA (UDVA, CDVA), uncorrected and corrected near VA (UNVA, CNVA), contrast sensitivity with low spatial frequency, and defocus curve between the two groups. In conclusion, in eyes implanted with a diffractive MIOL, a pupil diameter of ≤3.0 mm deteriorates contrast sensitivity. This effect was eliminated postoperatively when pupil size was enlarged to >3.0 mm during surgery.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
Postoperative visual acuity (VA). No significant difference was observed in UDVA, CDVA, UNVA, and CNVA between the two groups. SDP: eyes with a preoperative pupil size of <3.0 mm. LDP (controls): eyes with a preoperative pupil size ≥3.0 mm. UDVA: uncorrected distance VA, CDVA: best-corrected distance VA, UNVA: uncorrected near VA, CNVA: best-corrected near VA.
Figure 2
Figure 2
Defocus curve. No significant difference was detected between the two groups in all near additional power. Decimal visual acuity was converted from the mean log MAR VA.
Figure 3
Figure 3
Contrast sensitivity. SDP group eyes registered significantly worse contrast sensitivity at 12 and 18 cycles per degree (cdp) than LDP group eyes (A), but eyes with a postoperative pupil size >3.0 mm among the SDP group were not significantly different from the LDP group eyes (B).
Figure 4
Figure 4
Low contrast VA. 12.5%: VA with 12.5% contrast. 6%: VA with 6% contrast. SDP group eyes registered significantly lower VA than LDP eyes both at 12.5% and 6.0% contrast (A), but the difference was no longer significant when eyes having a postoperative pupil size >3.0 mm among the SDP group were compared to the LDP group eyes (B).
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References

    1. Salati C, Salvetat ML, Zeppieri M, Brusini P. Pupil size influence on the intraocular performance of the multifocal AMO-Array intraocular lens in elderly patients. Eur J Ophthalmol. 2007;17:571–578. doi: 10.1177/112067210701700415. - DOI - PubMed
    1. Koch DD, Samuelson SW, Haft EA, Merin LM. Pupillary size and responsiveness: implications for selection of a bifocal intraocular lens. Ophthalmology. 1991;98:1030–1035. doi: 10.1016/S0161-6420(91)32181-X. - DOI - PubMed
    1. Ravalico G, Baccara F, Bellavitis A. Refractive bifocal intraocular lens and pupillary diameter. J Cataract Refract Surg. 1992;18:594–597. doi: 10.1016/S0886-3350(13)80450-6. - DOI - PubMed
    1. Fujimoto K, Honda K, Wada Y. Laser iridoplasty for age-related pupil constriction after refractive multifocal intraocular lens implantation. Journal of the Eye. 2015;32:1483–6.
    1. Artigas JM, Menezo JL, Peris C, Felipe A, Díaz-Llopis M. Image quality with multifocal intraocular lenses and the effect of pupil size: comparison of refractive and hybrid refractive-diffractive designs. J Cataract Refract Surg. 2007;33:2111–7. doi: 10.1016/j.jcrs.2007.07.035. - DOI - PubMed

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