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Comparison of three new swept-source optical coherence biometry devices in cataract patients

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Session Details

Session Title: Presented Poster Session: Cataract Surgery Outcomes

Venue: Poster Village: Pod 1

First Author: : A.Tamaoki JAPAN

Co Author(s): :    T. Kojima   A. Hasegawa   M. Yamamoto   T. Kaga   K. Tanaka   K. Ichikawa

Abstract Details

Purpose:

Using three new swept-source optical coherence biometers (OCT-M: IOLMaster 700, Carl Zeiss Meditec, Jena, Germany), (OCT-A: ARGOS, santec, Komaki-shi, Aichi, Japan), and optical low-coherence reflectometer (OLCR: OA-2000, Tomey, Nagoya, Japan), we compared the axial length acquisition rate, the measured values of axial length (AL), anterior chamber depth (ACD), and mean keratometry values (K). We also compared the postoperative refractive errors of each device.

Setting:

Department of Ophthalmology Chukyo Hospital, Nagoya Japan.

Methods:

Four hundred eleven eyes of 411 patients were enrolled. Each participant was examined using three biometers. Each measurement value was compared with a subset (n = 378) in which the axial length could be measured with all devices. The postoperative refractive errors in the Haigis formula were evaluated in eyes with identical intraocular lenses inserted(AN6KA, Kowa, Nagoya, Japan) (n = 101) three months after cataract surgery. We used the Haigis formula IOL constants a0, a1, and a2, which were optimized by the partial coherence interferometer (IOLMaster 500,Carl Zeiss Meditec).

Results:

OCT-M showed a lower acquisition rate (92.7%) than other devices (OCT-A, 98.3%; OLCR, 97.1%) (p < 0.0001). The AL median value among the three devices was statistically different (OCT-M, 23.73 mm; OCT-A, 23.67 mm; OLCR, 23.70 mm) (p < 0.0001). AL from OCT-A revealed a proportional error between the other devices. (R2 = 0.4604 for OCT-M; R2 = 0.4071 for OLCR).There was no significant difference in postoperative median absolute refractive error between the three devices (p = 0.4442). However, when AL ≥ 26 mm (n = 13), OCT-A showed significantly higher refractive error than OLCR (0.12D; p = 0.0149).

Conclusions:

OCT-A showed the highest AL acquisition rate among the three new swept-source optical coherence biometers. Although there were significant differences measured values between the three devices, there was no significant difference in postoperative refractive error. However, in cases of long-axial length (≥ 26 mm), the refractive error of the Haigis formula using OLCR was smaller than using OCT-A.

Financial Disclosure:

receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented

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