The Relationship between Kappa Angle and Photic Phenomena after Trifocal Intraocular Lens Implantation

Authors : Hacı KOÇ, Faruk KAYA

Pages : 173-178

Doi:10.18678/dtfd.1278566

View : 43 | Download : 66

Publication Date : 2023-08-30

Article Type : Research Paper

Abstract :Aim: This study aimed to investigate the relationship between photic phenomena and the kappa angle after trifocal lens implantations. Material and Methods: Fifty eyes of 35 cases, 17 female and 18 male, were included in the study. The kappa angle was calculated with the Lenstar LS900 low-coherence interferometry device using the pupil barycenter parameter. It was also calculated by using the iris barycenter parameters. According to the calculations using the pupil barycenter distance, the patients were divided into two groups with the preoperative pupil barycenter distance below 0.4 mm and above 0.4 mm. A questionnaire was applied to the patients to evaluate complaints and satisfaction in the postoperative period. Results: The mean preoperative pupil barycenter distance was 0.38±0.12 mm and 52.0% insert ignore into journalissuearticles values(n=26); of the measurements were below 0.40 mm, while the mean preoperative iris barycenter distance was 0.40±0.15 mm and 46.0% insert ignore into journalissuearticles values(n=23); of the measurements were below 0.40 mm. No significant correlation was found between the preoperative pupil barycenter distance and the preoperative iris barycenter distance insert ignore into journalissuearticles values(rs=0.086, p=0.553);. Additionally, there was no statistically significant difference between the two groups concerning symptoms such as halo and glare insert ignore into journalissuearticles values(p=0.948);. Conclusion: When considering a kappa angle upper limit of 0.6 mm, there is no discernible difference in the frequency of occurrence of photic phenomena. We believe that both iris barycenter parameters and pupil barycenter parameters, utilized for kappa angle calculations, can be effectively employed to determine the deviation distance.
Keywords : iris barycenter, kappa açısı, fotik fenomen, pupil barycenter, trifokal intraoküler lens