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The influence of pupil size on visual acuity post KAMRA inlay implantation

Session Details

Session Title: Intracorneal inlays for correction of presbyopia

Session Date/Time: Tuesday 08/10/2013 | 08:00-10:30

Paper Time: 10:18

Venue: Main Lecture Hall (Ground Floor)

First Author: : T.Huseynova JAPAN

Co Author(s): :    T. Kanamori   M. Tomita           

Abstract Details

Purpose:

To investigate the influence of pupil size on the visual acuity post KAMRA inlay implantation.

Setting:

Shinagawa LASIK Center, Tokyo, Japan.

Methods:

684 presbyopic eyes of 684 patients were implanted with a KAMRA inlay in their non-dominant eye. Two groups was classified, one small-pupil group and one large-pupil group for both mesopic (pupil diameter less than 6 mm, and pupil diameter 6 mm or more) and photopic pupil size parameters (pupil diameter less than 4 mm, and pupil diameter 4 mm or more). Uncorrected near visual acuity (UNVA), uncorrected distance visual acuity (UDVA), best-corrected distance visual acuity (CDVA), and best corrected near visual acuity (CNVA) were measured in patients were assessed. The follow up period was 6 months.

Results:

There were no significant differences in UNVA (p = 0.63), and CNVA (p = 0.15) between the small and large mesopic pupil size groups after 6 months. Mean UDVA for both mesopic and both photopic pupil size groups was 20/20, 6 months postoperatively. For distance visual acuity, in the mesopic pupil size groups there were significant differences in UDVA (p = 0.019) and CDVA (p = 0.033) between the groups, however no correlation with pupil size was found for the small-pupil group (UDVA, r = 0.037, p = 0.478; CDVA, r = -0.024, p = 0.643), nor for the large-pupil group (UDVA, r = -0.015, p = 0.798; r = 0.030, p = 0.600). The photopic pupil size groups showed no significant differences in UNVA (p = 0.784), CNVA (p = 0.976), UDVA (p = 0.420) and CDVA (p = 0.195) at 6 months postoperative.

Conclusions:

This study determined that pupil size doesn’t have an influence on the resultant visual acuity post-KAMRA inlay implantation surgery. There was no correlation between the pupil size and the visual acuity either pre- or postoperatively for either mesopic or photopic pupil groups.

Financial Interest:

... research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented, ... travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented