Posters

Comparison of residual astigmatism and quality of life after toric intraocular lens implantation in cataract surgery by intraoperative marking with Verion® system versus preoperative manual marking

Poster Details

First Author: O.Garcia Diaz MEXICO

Co Author(s):    J. Olivares de Emparan                    

Abstract Details

Purpose:

Measure residual astigmatism in post-surgery cataract patients with toric intraocular lens (IOL) implantation, comparing the group with Verion marking vs the group with manual marking. -Measure with a previously validated survey, the change in the quality of life of patients after cataract surgery with toric intraocular lens and compare the difference between Verion marking versus manual marking. -Correlate the pre and post-surgical visual acuity (VA) of the patients with the pre and post-surgical quality of life score and compare the difference between Verion marking versus manual marking.

Setting:

patients with cataract and keratometry astigmatism greater than 1 diopter (D) in the hospital "Asociación Para Evitar La Ceguera" in Mexico City.

Methods:

Prospective, longitudinal and observational study. Sample size 48 patients per group. Patients with keratometric astigmatism >1 diopter. Group 1 marking and axis alignment using Verion. Group 2 marking and manual alignment in slit lamp. In both groups, biometry, visual acuity and refraction were measured. The quality of life survey (NEI-VFQ 25) was applied before surgery and then 3 months after surgery. Descriptive analysis of demographic variables and a Student's t-test were performed for the pre and post-surgical comparison of visual acuity, residual refractive astigmatism and quality of life score

Results:

Group 1 included 4 (28.5%) persons, the average age of the group was 53.2 ± 20.32 years (n = 14 range 16 -78 years). Group 2 included 14 (60.86%) persons, the average age of the group was 62.42 ± 9.19 years (n = 23 range 46-85 years). The pre surgical keratometric astigmatism for group 1 was -2.83 ± 1.03 (range 1.00 - 4.1D) and for group 2 it was -2.49 ± 1.07 (range 1.00 - 4.44D). No statistically significant difference. The spherical power of IOL in both groups was similar. Post-surgical VA for group 1 was 0.15 logMAR, for group 2 it was 0.2 logMAR. No statistically significant difference. Post-surgical residual refractive astigmatism for group 1 was -0.45 ± 0.78D (range 0.0-2.0D), for group 2 it was -1.18 ± 0.88 D (range 0.25– 2.5D). The pre-surgical quality of life score was not statistically significant but the post-surgical one was higher in group 2

Conclusions:

Regarding the postsurgical results, there is no statistically significant difference in VA or residual refractive astigmatism between both groups, but there is a difference in quality of life, being higher in group 2 However, the sample size in this preliminary analysis is not sufficient to determine a valid association of the quality of life score. In both groups there was no correlation between postsurgical VA and quality of life. There does not seem to be a difference between Verion marking versus manual marking in the variables measured in this study, but it is necessary to increase the sample size

Financial Disclosure:

None