Impact and visualization of scotomatic glare in central visual field perception

Hering D, Jakobs FM, Ritt G, Henrichsen M, Hohberger B (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Vision research Elsevier

Book Volume: 222

Article Number: 108457

DOI: 10.1016/j.visres.2024.108457

Abstract

Strong monochromatic point light sources such as Light Emitting Diodes (LED) or Lasers have been increasingly used in recent decades. This also raises the risk of misuse resulting in glare phenomena and associated visual impairment. The objective of this prospective and partially blinded study was the visualization and characterization of glare-induced scotomas in visual field by dazzling with monochromatic point light sources in terms of disability and discomfort glare. Automated threshold perimetry under dazzling by LED exposure at three different wavelengths (470, 530 and 625 nm) and four different intensities (25, 50, 75, and 100%) was performed in 31 healthy subjects resulting in 434 visual field examinations. Visual disability was measured by sensitivity loss in the central 30° as compared to unexposed controls and visualized by reconstruction of mean visual fields for each group via backward-calculation. Psychological glare was assessed by subsequent questionnaire and evaluated based on the de Boer rating scale of discomfort. Increasing glare intensities resulted in a significant decrease in mean sensitivity for all wavelengths tested, paralleled by an increase of discomfort glare. The loss of sensitivity was scattered over all quadrants with accentuation of the corresponding mean exposure area. Reconstructed visual fields confirmed visual impairment in all quadrants at an extent of at least 30°. We conclude that even off-axis light exposure may affect central visual field perception. Our results extend previous research on directed light interaction and contribute in explaining its incapacitating impact on human performance.

Authors with CRIS profile

Diana Hering Medizinische Fakultät Bettina Hohberger Department of Ophthalmology

Involved external institutions

AiF Arbeitsgemeinschaft industrieller Forschungsvereinigungen „Otto von Guericke“ e.V. DE Germany (DE) Fraunhofer Institute for Optronics, System Technologies and Image Exploitation (IOSB) DE Germany (DE)

How to cite

APA:

Hering, D., Jakobs, F.M., Ritt, G., Henrichsen, M., & Hohberger, B. (2024). Impact and visualization of scotomatic glare in central visual field perception. Vision research, 222. https://doi.org/10.1016/j.visres.2024.108457

MLA:

Hering, Diana, et al. "Impact and visualization of scotomatic glare in central visual field perception." Vision research 222 (2024).

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