Purpose: This study aimed to evaluate axial movements with time after implantation of a+1.50 diopter(D)low-add-power dual-mono-focal segmented intraocular lens(IOL), which has a one-piece plate shape and total length of 11.0 mm.
Subjects and methods: In total, 20 eyes of 10 patients who underwent cataract surgery with implantation of this IOL between October and November 2017 were evaluated. The subjective refraction, corneal refractive power, and postoperative aqueous depth (PAD, defined as the distance between the corneal endothelium and the anterior surface of the IOL) were measured at 4 days and 1, 3, 6, and 12 months postoperatively. Anterior-segment optical coherence tomography was used to measure corneal refractive power and PAD.
Results: The mean PADs at 4 days and 1, 3, 6, and 12 months were 3.80±0.36(standard deviation), 4.04±0.38, 4.11±0.44, 4.09±0.45, and 4.08±0.42 mm, respectively, indicating that significant deepening was noted for each (p<0.005). The significant changes in the PAD from the baseline at 4 days to 1, 3, and 12 months were 0.24±0.33 (p<0.005), 0.31±0.23 (p<0.005), and 0.28±0.19 mm (p<0.005), respectively. The mean postoperative changes in the subjective refraction and corneal refractive power from 4 days to 12 months were+0.24 D and-0.19 D, neither of which were significant.
Conclusions: The one-piece plate-shaped low-add-power segmented IOL gradually shifts posteriorly over 3 months directly after surgery and stabilizes thereafter.
Nippon Ganka Gakkai Zasshi (J Jpn Ophthalmol Soc) 124: 395-401, 2020.