Comparing Measurements From Anterion Oct, Aviso Ubm And Aladdin Optical Biometry
Published 2025 - 43rd Congress of the ESCRS
Reference: PP09.08 | Type: Free paper | DOI: 10.82333/5nb5-1b84
Authors: Luigi Donato* 1 , Concetta Scimone 2 , Simona Alibrandi 1 , Alessandro Pozzato 3 , Sergio Zaccaria Scalinci 4 , Domenico Mordà 5 , Carmela Rinaldi 2 , Rosalia D'Angelo 2 , Antonina Sidoti 1
1BIOMORF,University of Messina,Messina,Italy;IEMEST,Palermo,Italy, 2BIOMORF,University of Messina,Messina,Italy, 3Telea Electronic Engineering Srl,Sandrigo (VI),Italy, 4Medical and Surgical Sciences,University of Bologna,Bologna,Italy, 5BIOMORF,University of Messina,Messina,Italy;Department of Veterinary Sciences,University of Messina,Messina,Italy;IEMEST,Palermo,Italy
Purpose
To evaluate repeatability and systematic differences for anterior segment parameters of Anterion Metrics Module OCT(Heidelberg Engineering) and Aviso ultrasound biomicroscopy UBM (Quantel) and compare them to standard optical biometry using Aladdin (Topcon). These instruments could be used for comparing the exact postoperative position of entire intraocular lens (IOL), compare it to predicted actual postoperative position of IOL by IOL calculation formulas or creating multimodal analysis of anterior segment allowing quantitative imaging of the entire anterior segment, including ciliary body area that can be used for glaucoma classification, myopia development monitoring, preoperative cataract evaluation and many other eye diseases.
Setting
Great Lakes Eye Consultants, Traverse City, Michigan, Private practice with multiple locations
Methods
Thi is retrospective study of 25 pseudophakic patients using automatic and manual measurements using Cataract and Metrics module of Anterion OCT, Aviso UBM and Aladdin optical biometry. All implanted IOLs were based on Alcon SN60WF platform. Spur to spur measurements at 3 and 9 o'clock positions, anterior chamber depth, IOL thickness, corneal thickness, keratometry and pupil diameter were compared. Repeatability of UBM measurements using 3 operators is assessed. Corrected ultrasound measurements for speed of sound in different segments is compared to optical measurements. Systematic differences between instruments are analyzed and corrected.
Results
Spur to spur distance using OCT was 11.86 +/- 0.39 mm and using UBM was 11.48 +/- 0.37 mm. Anterior chamber depth using OCT was 4.75 +/- 0.28 mm, using UBM 4.8 +/- 0.3 mm and using Aladdin biometry 4.63 +/- 4.63 +/- 0.27 mm. IOL thickness using OCT was 0.70 +/- 0.11 mm, using corrected UBM measurement was 0.73 +/- 0.08 mm. Pupil diameter was 2.63 +/- 0.4 mm using Metrics module OCT and 2.63 +/- 0.53 mm using UBM. Five 20 diopter IOLs had an average IOL thickness of 0.682 mm using OCT, 0.725 mm using UBM compared with IOL thickness of 0.614 mm listed by Alcon manufacturer.
Conclusions
Studied parameters using Anterion OCT, Aviso UBM and Aladdin biometer have high correlation in the range of 0.9 to 0.98. Spur to spur measurements had a systematic difference of 0.38 mm or 3 percent using Anterion OCT and Aviso UBM. The IOL thickness for five patients with IOL of 20 D was larger using OCT as well as UBM compared to thickness listed by the Alcon manufacturer. All other studied parameters were equivalent and exchangeable. As Aviso UBM has a linear probe with movement of transducer in horizontal direction, it is likely that horizontal measurements are close to real distances. Anterion OCT is more precise compared to UBM for vertical measurements, but contains proprietary software correcting refractive and fan distortions.