Original articleTime Course of Accommodation After Implantable Collamer Lens Implantation
Section snippets
Methods
Sixty-nine eyes (from 26 men and 43 women) of the 40 consecutive patients who underwent implantation of the posterior chamber phakic ICL for the correction of myopia were included in this study. The patient age at the time of surgery was 36.0 ± 10.2 years (mean age ± standard deviation [SD]; range, 21 to 59 years). The preoperative refraction ± spherical equivalent was −10.07 ± 3.49 diopters [D] (range, −3.25 to −22.75 D). The relationship between patient age and preoperative refraction is
Results
Bland-Altman plots indicate that the mean difference between the five consecutive measurements with this accommodometer (± 95% limits of agreement [LoA]) was −0.01 ± 0.32 D (range, −0.64 to 0.61 D; Figure 2).
The time course of accommodation is shown in Figure 3. Accommodation was 6.36 ± 3.94 D (mean ± SD) before surgery, and 4.89 ± 2.72 D, 4.98 ± 2.67 D, 5.16 ± 2.72 D, and 5.72 ± 2.85 D at one, three, six, and 12 months after surgery, respectively. The variance of the data was statistically
Discussion
Our results demonstrated that accommodation decreased transiently at one month after ICL implantation, which gradually returned almost back to baseline levels at one year after ICL implantation. This may be attributed to transient dysfunction of the ciliary muscles by ICL fixation to the sulcus even if the crystalline lens remained untouched. Myopic eyes wearing spectacle lenses have higher accommodation than emmetropic eyes. Moreover, retinal magnification of ICL implantation is less decreased
Kazutaka Kamiya, MD, PhD, graduated from Kobe University, Faculty of Medicine, Japan, and specialized in ophthalmology in the Faculty of Medicine, Tokyo University, Japan. Dr Kamiya is Chief of Corneal Research and Refractive Surgery in Kitasato University Hospital, and an Assistant Professor in the Faculty of Medicine, Kitasato University, Faculty of Medicine, Japan.
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Kazutaka Kamiya, MD, PhD, graduated from Kobe University, Faculty of Medicine, Japan, and specialized in ophthalmology in the Faculty of Medicine, Tokyo University, Japan. Dr Kamiya is Chief of Corneal Research and Refractive Surgery in Kitasato University Hospital, and an Assistant Professor in the Faculty of Medicine, Kitasato University, Faculty of Medicine, Japan.