Change in optical axial length after cataract surgery: segmental method vs composite method. Issue 5 (May 2020)

• Record Type: Journal Article
• Authors: Goto, So; Maeda, Naoyuki; Noda, Toru; Ohnuma, Kazuhiko; Iehisa, Ikko; Koh, Shizuka; Nishida, Kohji
• Is Part Of: Journal of cataract and refractive surgery. Volume 46:Issue 5(2020)
• Page Start: 710
• Page End: 715
• Publication Date: 2020-05
• Subjects: 617.7
• DOI: 10.1097/j.jcrs.0000000000000149
• Languages: English
• ISSNs: 0886-3350

Abstract

Abstract : SS-OCT using the segmental method can reduce the difference between preoperative and postoperative axial length measurements. Abstract : Purpose: To compare the changes in axial length (AL) obtained after cataract surgery by partial coherence interferometry (PCI), swept-source optical coherence tomography with the composite method (SS-OCT/CM), and SS-OCT with the segmental method (SS-OCT/SM). Setting: National Hospital Organization, Tokyo Medical Center, Japan. Design: Retrospective case series. Methods: AL was measured preoperatively and 1 month postoperatively by PCI, SS-OCT/CM, and SS-OCT/SM. Results: Two hundred sixty-eight eyes in 139 patients who underwent cataract surgery were included. The mean ALs measured by PCI and SS-OCT/CM decreased significantly from 24.14 ± 1.58 to 24.05 ± 1.58 mm ( P < .0001) and from 24.15 ± 1.58 to 24.05 ± 1.59 mm ( P < .0001), respectively. The mean differences between the preoperative and postoperative AL were 0.083 ± 0.044 mm (PCI) and 0.096 ± 0.045 mm (SS-OCT/CM), respectively; Bland–Altman analysis revealed fixed bias between the preoperative and postoperative values. The mean preoperative and postoperative ALs measured by SS-OCT/SM were 24.12 ± 1.54 and 24.12 ± 1.54 mm, respectively ( P = 0.97). The mean difference between the preoperative and postoperative ALs was 0.00 ± 0.03 mm on SS-OCT/SM; Bland–Altman analysis indicated good agreement between these values. Conclusions: The difference between preoperative and postoperative ALs is less with SS-OCT/SM than with PCI or SS-OCT/CM. Assuming that AL is not altered by cataract surgery, AL measurement is more accurate by SS-OCT/SM than by PCI or SS-OCT/CM.