Abstract
Accurate alignment of an intraocular lens (IOL) is indispensable for achieving accurate postoperative refractive outcomes. Thus, we evaluated decentration and tilt of single- and three-piece IOLs, as well as anterior chamber depth (ACD), at 3 hours, 24 hours, 2 weeks, and 4 weeks after cataract surgery, using swept-source anterior segment optical coherence tomography. There was no significant difference in postoperative visual acuity between eyes with single- or three-piece IOLs. Absolute values of IOL decentration at 24 hours and 2 weeks after surgery were significantly larger (P = 0.008 and 0.046, respectively) in eyes with the single-piece IOL than in those with the three-piece IOL. Both single- and three-piece IOLs tended to tilt toward the inferotemporal direction; however, there was no significant difference in the absolute values of IOL tilt at any postoperative time point. ACD at 24 hours after surgery was significantly deeper (P = 0.009) in eyes with the three-piece IOL, compared with eyes with the single-piece IOL. Therefore, although both single- and three-piece IOL locations varied transiently after surgery, IOL locations were similar between both IOLs at 4 weeks after surgery and were not associated with any statistical difference in visual function.
Highlights
A second generation of swept-source anterior segment optical coherence tomography (SS-ASOCT) has become commercially available since 2015 (CASIA2, Tomey Corp., Nagoya, Japan); this new instrument possesses 13-mm depth and 16-mm width of scan range, along with ≤ 10 μm of axial resolution when utilizing a light whose wavelength is 1310 nm
We investigated short-term dynamics after single- and three-piece intraocular lens (IOL) implantation using SS-ASOCT, utilizing identical IOL material from a single manufacturer, after uneventful phacoemulsification
We found that intra- and interobserver reproducibility was almost perfect. These results suggest that SS-ASOCT may serve as a reliable tool for evaluation of IOL location
Summary
A second generation of swept-source anterior segment optical coherence tomography (SS-ASOCT) has become commercially available since 2015 (CASIA2, Tomey Corp., Nagoya, Japan); this new instrument possesses 13-mm depth and 16-mm width of scan range, along with ≤ 10 μm of axial resolution when utilizing a light whose wavelength is 1310 nm. In eyes with the three-piece IOL, the ICCs were 0.982–0.985 for the degree of IOL decentration, 0.823–0.898 for the degree of IOL tilt, and 0.999 for the ACD. Absolute values of IOL decentration at 24 hours and 2 weeks after surgery were significantly larger (P = 0.008 and 0.046, respectively) in eyes with a single-piece IOL than in eyes with a three-piece IOL (Table 3).
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