Prospective Comparison of One-Piece and Three-Piece Tecnis Aspheric Intraocular Lenses: 1-year Stability and its Effect on Visual Function

Abstract

Purpose: To compare the stability and visual function of one-piece hydrophobic intraocular lens (IOL) (ZCB00, Abbot Medical Optics) and a three-piece hydrophobic IOL (ZA9003, Abbot Medical Optics) after cataract surgery.

Materials and methods: Eighteen eyes of 18 patients with the one-piece IOL and 20 eyes of 20 patients with the three-piece IOL who underwent cataract surgery were evaluated prospectively on best corrected distance visual acuity, postoperative refractive error, IOL decentration and tilt, anterior chamber depth (ACD), spherical aberration and contrast sensitivity. Measurements were performed 1 week and 1, 3, 6 and 12 months postoperatively. The postoperative outcomes were compared between the two groups.

Results: In the one-piece group, a hyperopic refractive error (p < 0.002) and deeper ACDs during 1-year post-operatively were observed compared with the three-piece group. There were no significant differences in BCVA, IOL tilt, spherical aberration or contrast sensitivity.

Conclusions: The stability of the one-piece IOL was greater than that of the three-piece IOL. The postoperative ACD and refractive error demonstrated that an anteriorly offset haptic in the one-piece IOL allowed incremental fixation to the posterior capsule.

Keywords:

• Anterior chamber depth
• IOL stability
• lens haptic
• one-piece intraocular lens
• posterior capsule

DECLARATION OF INTEREST

Dr. Miyata reports grants and personal fees from Abbot Medical Optics, Japan, during the conduct of the study; grants and personal fees from Alcon, Abbot Medical Optics, HOYA, Senju Pharmaceutical, Otsuka Pharmaceutical, and Santen Pharmaceutical, grants from BD and Mitsubishi Chemical Medience, personal fees from Pfizer and MSD, outside the submitted work. Mr. Minami reports grants and personal fees from Abbot Medical Optics, Japan, during the conduct of the study; personal fees from Abbot Medical Optics, Japan, Alcon, and Chuo Sangyo, outside the submitted work. The funding organization had no role in the design or conduct of this research. Other authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.