Comparison Of Argos Biometer With Verion Digital Marking And Manual Marking For Toric Intraocular Lens
Published 2024 - 42nd Congress of the ESCRS
Reference: PO476 | Type: Poster | DOI: 10.82333/gqvd-6x21
Authors: Yi-Hsuan Li* 1 , Yuan-Sheng WANG 2 , Yu-Lun LO 3 , Jiun Yo LIN 4 , Chao-Kai CHANG 5
1Ophthalmology,Nobel Eye Clinics,New Taipei city,Taiwan, Province of China, 2Ophthalmology,Shin Kong Wu Ho-Su Memorial Hospital,Taipei ,Taiwan, Province of China, 3Ophthalmology,Nobel Eye Clinics,Taichung,Taiwan, Province of China, 4Ophthalmology,Nobel Eye Clinics,Kaohsiung,Taiwan, Province of China, 5Ophthalmology,Nobel Eye Clinics,Taipei ,Taiwan, Province of China
Purpose
To compare the precision of axis alignment between digital marking with an ARGOS biometer and manual marking in patients undergoing cataract surgery with Toric intraocular lens (IOL) implantation.
Setting
Precise alignment of Toric IOL is crucial to achieving satisfactory astigmatism correction, and according to the previous study, digital marking (ex: Callisto eye image-guided system, VERION digital marker) is superior to manual marker with less Toric IOL axis misalignment. This study will explore the axial misalignment between the Argos Biometer integrated with the digital marker and the manual marking.
Methods
This is a randomized prospective study that involves two groups of patients. The study includes patients who are undergoing cataract surgery and have corneal astigmatism between 0.75 and 4.0 diopter. The patients were randomly allocated to either a manual or digital marking group. The digital marking group utilized the Argos biometer system with DMM (digital marker microscope, VERION) to guide Toric IOL alignment. In contrast, the manual marking group aligned the Toric IOL axis with the corneal marking labelled under the slit lamp before surgery. The study assessed the axis misalignment, uncorrected distance visual acuity (UCDVA), residual astigmatism, and spherical equivalent at post-op one month.
Results
For digital group, two subjects were included in the initial results. Case 1 with corneal astigmatism -2.25 diopter had toric IOL misalignment of 2 degrees after one month of the surgery; the UCDVA was 1.0, and the residual astigmatism was -0.25D. Case 2 had -2.0 diopter corneal astigmatism, the toric IOL misalignment was 2 degrees in the post-op one month; the UCDVA was 0.9, and the residual astigmatism was -0.5 D. For manual group, one subject with corneal astigmatism having -1.75 diopter was included in the initial results. The toric IOL misalignment was found to be 3 degrees after one day of the surgery.
Conclusions
An ARGOS biometer with VERION DMM may offer precise guidance for toric IOL alignment in cataract surgery patients. A larger sample size for further data analysis is ongoing