Repeatability of intraoperative Hartmann-Shack wavefront sensing in cataract surgery. Issue 7 (July 2021)

• Record Type: Journal Article
• Authors: Georgiev, Stefan; Hirnschall, Nino; Fişuş, Andreea-Dana; Ruiss, Manuel; Hienert, Julius; Leisser, Christoph; Findl, Oliver
• Is Part Of: Journal of cataract and refractive surgery. Volume 47:Issue 7(2021)
• Page Start: 902
• Page End: 906
• Publication Date: 2021-07
• Subjects: 617.7
• DOI: 10.1097/j.jcrs.0000000000000550
• Languages: English
• ISSNs: 0886-3350

Abstract

Abstract : Under stable conditions, intraoperative aberrometry is applicable, but the intraoperative setting resulted in a lower repeatability and broadened the agreement range compared with perioperative aberrometry. Abstract : Purpose: To evaluate the repeatability of aphakic intraoperative wavefront aberrometry and compare it with preoperative and postoperative aberrometry. Setting: Department of Ophthalmology, Hanusch Hospital, Vienna, Austria. Design: Prospective case series. Methods: Patients scheduled for cataract surgery were each measured 3 consecutive times using Hartmann-Shack wavefront sensing (HS-WFS) preoperatively, intraoperatively in aphakia, and 2 months postoperatively after intraocular lens implantation by a single examiner. Intraclass correlation coefficients (ICCs) of spherical equivalent (SE) values were evaluated for each timepoint. Intrasubject standard deviation (Sw ) as repeatability (Sr ) with corresponding repeatability limit (1.96 2 × S w ) and mean SE differences with corresponding limits of agreement (LoA) were calculated for comparison. Results: A high consistency of repeated measurements was found with ICCs above 0.9 for each of the 3 timepoints. Intraobserver repeatability (Sr ) and repeatability limit (r) of intraoperative aberrometry SE measurements (30 eyes of 30 patients) were 0.34 diopters (D) and 0.95 D, respectively. The LoA for intraoperative aphakic SE across 3 consecutive measurements were −0.71 to +0.85 D. For comparison, Sr and r for phakic preoperative measurements in the cataractous state (30 eyes of 30 patients) and postoperative measurements in the pseudophakic state (24 eyes of 24 patients) were 0.33 D and 0.93 D and 0.23 D and 0.64 D, respectively. Similarly, the LoA for preoperative and postoperative SE measurements were −0.66 to +0.60 D and −0.27 to +0.45 D, respectively. Conclusions: HS-WFS test–retest reliability was high for all 3 timepoints, but the intraoperative setting resulted in a lower repeatability and broadened the agreement range.