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. 2022 Apr 27:16:1321-1329.
doi: 10.2147/OPTH.S363536. eCollection 2022.

The Effects of Angle Kappa on Clinical Results and Patient-Reported Outcomes After Implantation of a Trifocal Intraocular Lens

Helga P Sandoval  1 , Richard Potvin  2 , Kerry D Solomon  1
Affiliations

The Effects of Angle Kappa on Clinical Results and Patient-Reported Outcomes After Implantation of a Trifocal Intraocular Lens

Helga P Sandoval et al. Clin Ophthalmol. .

Abstract

Purpose: To objectively determine if angle kappa materially influenced clinical outcomes or patient-reported satisfaction and visual quality of patients implanted with a trifocal intraocular lens (IOL).

Methods: This was a non-interventional study of clinical outcomes. Subjects were patients choosing to be bilaterally implanted with a trifocal IOL (PanOptix®) who were then evaluated 3 months postoperative. Angle kappa (AK) was measured before surgery and at the 3-month visit. The 3-month visit included a manifest refraction, and measurement of uncorrected and distance corrected acuity at 4 m, 60 cm and 40 cm. Visual quality and satisfaction questionnaires were also administered.

Results: Data from 56 eyes of 28 subjects were analyzed; 26 eyes had an AK magnitude <0.3 mm, 14 had an AK from 0.3 mm to less than 4 mm and 16 had an AK ≥0.4 mm. Neither visual disturbances (eg, glare, halos, starbursts), satisfaction nor spectacle dependence were correlated to the magnitude of angle kappa. The magnitude of postoperative AK was significantly lower than preoperative (0.24 ± 0.12 mm vs 0.30 ± 0.16 mm, p < 0.01).

Conclusion: The magnitude of preoperative Angle Kappa had no apparent effect on the refractive, visual acuity or subjective (visual disturbances, quality of vision, satisfaction) clinical outcomes with this trifocal IOL. The magnitude of angle kappa was significantly lower after surgery.

Keywords: angle kappa; cataract surgery; trifocal IOL.

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Conflict of interest statement

Richard Potvin is a consultant to Alcon and Carl Zeiss Meditec. Helga P Sandoval reports grants from Alcon. Kerry D Solomon is a consultant for Alcon Laboratories, Allergan, Aquesys, Bausch and Lomb, Clarvista Medical, Glaukos, Icon Bioscience, Imprimis, Integrity Digital Solutions, Johnson & Johnson Vision, Kala Pharmaceuticals, Lenstec, Mati Therapeutics, Octane Visionary VC Fund, Ocuhub, Omeros Corporation, Pogotec, PRN, Tearlab, Versuant, and RxSight. The authors report no other conflicts of interest in this work.

Figures

Figure 1
Figure 1
Schematic diagram illustrating angle kappa and the proxy vector from an eye image.
Figure 2
Figure 2
Image and angle kappa calculation from the OPD-Scan III.
Figure 3
Figure 3
Frequency of visual disturbances reported. *Negative dysphotopsia.
Figure 4
Figure 4
Frequency of starbursts (top), halos (middle) and glare (bottom) by categorical magnitude of angle kappa.
Figure 5
Figure 5
Distribution of angle kappa vectors by eye, preoperative and postoperative (radial scale in mm). (A) preoperative OD, (B) preoperative OS, (C) postoperative OD, (D) postoperative OS.
See this image and copyright information in PMC

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