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Effect of pupil size on visual performance of presbyopes with small-aperture corneal inlay

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Session Details

Session Title: Presbyopia Management

Session Date/Time: Sunday 08/10/2017 | 16:30-18:00

Paper Time: 16:42

Venue: Room 2.1

First Author: : J.Vukich USA

Co Author(s): :                        

Abstract Details


The effects of photopic and mesopic pupil sizes on visual acuity and visual symptoms were evaluated patients implanted with the small-aperture IC-8 intraocular lens (IOL) in one eye and an aspheric monofocal IOL in the fellow eye.


A prospective, non-randomized study of 105 subjects with up to 6-month follow-up.


The photopic (P) and mesopic (M) pupil sizes were measured using a pupilometer, pupil gauge card or a millimeter ruler preoperatively in both eyes. The pupil sizes were categorized into two groups, Group 1 included eyes with > 4.5 mm (P1) and > 5.6 mm (M1) pupil sizes and Group 2 included eyes with pupil sizes ≤ 4.5 mm (P2) and ≤ 5.6 mm (M2). Distance-corrected visual acuities at distance (DCDVA), intermediate (DCIVA) and near (DCNVA) in logMAR and severity of visual symptoms (none- 0 to very severe-7) will be reported.


The mean photopic and mesopic pupil sizes for all IC-8 eyes were 3.61 ± 0.86 and 4.62 ± 0.94 mm, respectively. There was no clinically or statistically significant difference in visual acuities between groups P1 and P2. DCIVA was one line worse in group M1 vs. M2 (p = 0.0184). Visual symptoms, there were no significant differences between photopic and mesopic groups, except for halo scores between the mesopic pupil groups. The mean severity rating for halo rating in mesopic pupil Group 1 vs. Group 2 was 2.46 ± 0.84 vs. 0.84 ± 1.37 (p = 0.006).


Photopic pupil sizes have no impact on visual acuities or symptoms. Mesopic pupils greater than 5.6 mm have minimal impact on visual acuity and symptoms in eyes implanted with the small-aperture IC-8 IOL.

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