First impression of a central 3 mm retinal B-scan captured with an optical biometer prototype based on full eye-length SS-OCT scan biometry

Session Details

Session Title: Imaging

Session Date/Time: Tuesday 16/09/2014 | 08:00-10:30

Paper Time: 09:04

Venue: Capital Hall B

First Author: : W.Sekundo GERMANY

Co Author(s): :    W. Sekundo   K. Kunert   W. Haigis        

Abstract Details

Purpose:

To subjectively assess scan quality of retinal layers and pathology detection captured during routine optical biometry measurements with a full-eye-length SS-OCT-scan biometer prototype.

Setting:

Comparative multicentre clinical study: Dept. of Ophthalmology, Philipps University of Marburg, Dept. of Ophthalmology, Helios Clinic Erfurt, Dept. of Ophthalmology, University of Wuerzburg/Germany

Methods:

As part of a full-eye length OCT-scan protocol to measure biometrical parameters for IOL power calculation, central horizontal 3 mm retinal B-scans were taken for a range of retinal pathologies using a full-eye-length SS-OCT-scan biometer prototype IOLMaster 700 (Carl Zeiss Meditec AG, Jena, Germany). Pathologies were diagnosed based on slit-lamp examination and Fourier domain posterior segment OCT. A total of 23 patients participated in the study. Pathological characteristics included macular pucker, macular hole, macular scarring, macular oedema and central RPE detachment as well as characteristics associated with dry ARMD

Results:

Compared with resolution of retinal B-scans that are captured with retinal high definition OCTs, resolution of the 3 mm retinal B-scan of full-eye-length SS-OCT-scan biometry was lower. However, advanced pathological characteristics occurring within the horizontal central 3 mm zone of the retina such as macular hole, macular pucker, macular oedema, significant RPE detachments or large drusen were clearly discernible. Pucker related high reflectivity at the ILM – vitreous body intersection was also visible. It is suspected that pucker related high reflectivity can cause unreliable ILM/RPE detection in A-scan biometry. Subtle characteristics of dry ARMD (e.g. small drusen) were not discernible.

Conclusions:

Retinal layer detection of the central 3 mm B-scan of full-eye-length SS-OCT-scan biometry could serve as plausibility check for axial length measurements in standard and complicated cataract cases. Foveal retinal pathologies indicated during pre-exam routine biometry using full-eye-length SS-OCT-scan biometry could provide useful information for the interpretation of biometric measurement and further treatment planning prior to or during cataract surgery.

Financial Interest:

One or more of the authors... research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented