Deepening the understanding of the mechanism of clinical electroretinography based on the photopic/scotopic vision of human eyes

Author: Huang Houbin
DOI: 10.3760/cma.j.cn115989-20220415-00164
Published 2023-08-10
Cite as Chin J Exp Ophthalmol, 2023, 41(8): 795-800.

Abstract                               [Download PDF] [Read Full Text]

Visual electrophysiological examination has strict standards and quantitative methods for stimulating light, which involves the concepts of photopic and scotopic vision of human eyes.Photopic vision is a visual perceptual activity mainly involving cones in a bright environment, while scotopic vision is a visual perceptual activity mainly involving rod cells in a dark environment.Even if the rated power of the light source is the same, the brightness (luminous flux) perceived by human eyes is different for different spectral light sources in the same or different visual environments.To enable ophthalmologists and clinical visual electrophysiological examination technicians to accurately understand the setting mechanism and recording results of stimulating light in the international standard of visual electrophysiology, this paper introduced the basic concepts such as the concept of human eye photopic and scotopic vision, the measurement and expression of brightness in different visual environments, and the luminous flux of light sources under photopic and scotopic vision in detail, and interpreted the application of the concept of photopic and scotopic vision in clinical visual electrophysiology.

Key words:

Photopic vision; Scotopic vision; Clinical electrophysiology of vision; Stimulus strength; Luminous flux; Luminous efficacy

Contributor Information

Huang Houbin

Department of Ophthalmology, Hainan Hospital of PLA General Hospital, Sanya 572013, China

Senior Department of Ophthalmology, PLA General Hospital, Beijing 100853, China

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