Comparing short‐duration electro‐oculogram with and without mydriasis in controls

• Published in: Acta ophthalmologica (Oxford, England) England), 2014-09, Vol.92 (s253), p.0-0
• Main Authors: TÜRKSEVER, C, ORGÜL, S, TODOROVA, MG
• Format: Article
• Language: English
• Subjects: Ophthalmology
• ISSN: 1755-375X; 1755-3768
• DOI: 10.1111/j.1755-3768.2014.T013.x

Purpose In order to obtain artefact‐free EOG recordings the subject’s cooperation is necessary. The aim of our study is to evaluate recording characteristics of the short‐duration EOG and to compare the effect of mydriasis on EOG recordings in a cohort of controls. Methods EOG recordings were performed on a LED stimulus screen using a RETI‐port gamma plus2 system (RETIscanTM, Roland Consult). Dark phase included: pre‐adaptation (6min), alternate fixation (4min), fixation‐rest (20sek), 100 sweeps. Light phase included: light adaptation (4min), alternate fixation (10min), fixation‐rest (20sek), 250 sweeps. Amplifier was band pass filtered at 0.1‐50Hz. Background illumination in mydriasis was 100cd/m2 and in miosis 450cd/m2. Fast oscillations were set at 1.5sek (6 cycles; total duration 75sek). Results A total of 55 controls divided in three age‐groups participated (number; mean (years, y); ±SD): group 1: 18‐ 20y (19; 19.49y; ±0.89); group 2: 20‐40y (18; 27.91y; ±5.39) and group 3: 40‐60y (18; 48.66y; ±4.00). Arden ratio (AR), dark‐trough (DT) and light‐peak (LP) did not differ between recordings with or without mydriasis (p=0.885; p=0.860; p=0.776, linear mixed‐effects model). Age did not influence the AR, DT, LP (p= 0.206; p=0.112; p=0.155). AR, DT, LP were comparable between eyes tested (p=0.998; p=0.196; p=0.324). Conclusion Short‐duration EOG allows successful recording, where the application of mydriasis does not influence the quality of the recording.