Determining and Comparing the Effective Lens Position and Refractive Outcome of a Novel Rhexis-Fixated Lens to Established Lens Designs

Shajari, Mehdi; Sonntag, Ruven; Niermann, Theresa; Holland, Detlef; Kohnen, Thomas; Priglinger, Siegfried und Mayer, Wolfgang J. (2020): Determining and Comparing the Effective Lens Position and Refractive Outcome of a Novel Rhexis-Fixated Lens to Established Lens Designs. In: American Journal of Ophthalmology, Bd. 213: S. 62-68

Abstract

PURPOSE: WE sought to evaluate differences in effective lens position (ELP) based on the lens design. Intraocular lenses (IOLs) with plate-haptic, c-loop haptic, and a rhexis-fixated lens were compared. DESIGN: Retrospective, multicenter, comparative case series. METHODS: The study included patients having agerelated cataract surgery with implantation of either a plate-haptic, c-loop haptic, or a novel rhexis-fixated IOL. Biometry and refraction measurements were conducted preoperatively and 3 months postoperatively. Lens constant optimization was performed. RESULTS: Seventy eyes of 56 subjects were included. ELP for rhexis-fixated IOL was shortest (4.29 +/- 0.24 mm), followed by c-loop haptic (4.41 +/- 0.42 mm) and plate-haptic (4.51 +/- 0.26 mm) IOL. Difference in ELP was significant between rhexis-fixated IOL and both plate-haptic (P = .001) and c-loop haptic IOL (P = .000). Anterior chamber depth adjustment based on lens design showed a significant effect on refraction and IOL power predictions for all formulas and lenses (P < .05). For the rhexis-fixated IOL the differences in refraction ranged from - 0.039 diopters (D) for the Hill-Radial Basis Function to - 0.096 D for Haigis. The other 2 lenses showed mean differences in refraction between + 0.046 D for Hill-Radial Basis Function and + 0.097 D for Haigis. CONCLUSION: The difference in IOL fixation and its resulting position in the capsular bag have a significant effect on the effective lens position and consequently a significant effect on the prediction of postoperative refraction.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Medizin
• Themengebiete: 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit
• ISSN: 0002-9394
• Sprache: Englisch