Effect of pupil size on uncorrected visual acuity in pseudophakic eyes with astigmatism

Kazuhiro Watanabe, Kazuno Negishi, Murat Dogru, Takefumi Yamaguchi, Hidemasa Torii, Kazuo Tsubota

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

PURPOSE: To study the effect of pupil size on the relationship between refractive astigmatism and uncorrected distance visual acuity (UDVA) and pseudoaccommodation in pseudophakic eyes. METHODS: Thirty-six eyes from 36 patients who underwent phacoemulsifi cation and intraocular lens (IOL) implantation were included. All eyes were divided into two groups based on the presence of postoperative with-therule astigmatism or against-the-rule astigmatism. Uncorrected and corrected distance visual acuity (CDVA), refractive astigmatism, subjective accommodation amplitude, and pupil sizes under photopic and mesopic conditions were measured 1 month postoperatively. The effects of pupil size on the relationship between refractive astigmatism and UDVA were investigated. RESULTS: Against-the-rule astigmatism had a moderate but signifi cant negative linear correlation with UDVA irrespective of the pupil size (R2=0.60, P<.01). A moderate but signifi cant negative linear correlation was found when the pupil diameter exceeded 2.9 mm in eyes with with-the-rule astigmatism (R2=0.46, P=.04). Refractive astigmatism was not signifi cantly correlated with pseudoaccommodation regardless of the pupil diameter in either group. CONCLUSIONS: The results of the current study suggest that pupil size may have an impact on postoperative UDVA in eyes having against the-rule astigmatism and in eyes with a large pupil diameter and with-the-rule astigmatism.

Original languageEnglish
Pages (from-to)25-29
Number of pages5
JournalJournal of Refractive Surgery
Volume29
Issue number1
DOIs
Publication statusPublished - 2013 Jan

    Fingerprint

ASJC Scopus subject areas

  • Ophthalmology
  • Surgery

Cite this