Posters

Pupillary diameter change in photopic and mesopic conditions 3 months after phacoemulsification with trifocal IOL implantation

Poster Details

First Author: D.Castanera Gratacos SPAIN

Co Author(s):    E. Ordiñaga Monreal   F. Castanera de Molina   F. Sánchez Aparicio   C. Gala Núñez   A. Valsecchi        

Abstract Details

Purpose:

To evaluate the change in pupillary diameter in photopic and mesopic conditions 3 months after phacoemulsification + IOL implantation in two categories: Age and previous mesopic pupil diameter (PMPD)

Setting:

Clínica Oftalmológica TACIR, Centro Médico TEKNON, Barcelona, Spain.

Methods:

One hundred thirteen patients underwent digital pupil imaging with Placido Topography (Vario-Topolyzer, Wavelight, Erlangen, Germany). The measurements were taken before the phacoemulsification surgery and 3 months later. Two categories were made: The first category was segmented by their mesopic pupillary diameter previous to the surgery. The second category was segmented between age groups. Statistical analysis: the t-student test was used in the age category. One-way analysis of variance (ANOVA) and Tukey post hoc tests were used to assess the differences between the parametric groups. Kruskal-Wallis test was used for non-parametric groups. An effect size (Cohen’s d) was calculated.

Results:

The change in pupillary diameter in mesopic conditions was significantly different between subgroups in the PMPD category, F(3, 109) = 12.08, p = < 0.01. Paired comparisons showed that the differences were present in almost all groups. The Cohen’s effect size (d > 0.5). There are no significant statistical differences between the change in pupillary diameter under photopic conditions in the age groups, F(5,2.9) = .328, p=.89. The differences between the change in pupillary diameter under mesopic conditions were also not statistically significantly different between age groups H(5) = 7.19, p=0.21.

Conclusions:

The diameter of the photopic pupil decreases by 0.05 mm (-2.3%), while the diameter of the mesopic pupil decreases 0.43 mm (9.5%). But not all pupils experience the same reduction. Mesopic pupils greater than 5.5 mm suffered up to 0.9 mm (-14.5%) in diameter reduction. No differences in pupil diameter were observed in the two lighting conditions between the age groups.

Financial Disclosure:

None