Boundary threshold value test method of mesopic vision and photopic vision of human eyes

Abstract

The invention discloses a boundary threshold value test method of mesopic vision and photopic vision of human eyes. The method is characterized in that firstly, a dark room environment is built; an experiment dark room is built inside the dark room environment; light shading curtain cloth is arranged at three sides of the experiment dark room; an external screen is arranged at the other side of the experiment dark room; one side of the external screen is right against a projector; the projector is connected with a computer; vision test program runs on the computer; a round visual target is set through the computer and is projected on the external screen through the projector. A testee sits on an adjustable seat, the lower jaw is supported by a jaw frame; a tester operates the computer; whether the testee sees the round visual target or not is tested according to different brightness and retention time of the round visual target, and different background brightness of the external screen; whether the testee detects the round visual target or not is determined by a medical conventional detection rate method; further, the real response time of the testee for detecting the round visual target is obtained; the critical threshold value of the mesopic vision and photopic vision of the human eyes is obtained.

Description

technical field [0001] The invention relates to a research method for the relationship between different background luminances, different luminances of optotypes, dwell time and visual reaction time of the human eye at low luminance levels, and specifically relates to a threshold test for the boundary between mesovision and photopic vision of the human eye method. Background technique [0002] The photometric system adopted by the current international metrology standards covers the spectral luminous efficiency functions V(λ) and V'(λ) in the photopic and scotopic ranges, but the corresponding spectral luminous efficiency functions are not defined in the mesopic range. In 2010, the International Commission on Illumination (CIE) published a technical report CIE191, recommending a photometric system for mesopic vision based on visual performance. It describes the mesopic spectral light efficiency function V mes (λ) is a linear combination of V(λ) and V'(λ), the equation is a...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that there is no uniform definition of the boundary threshold between human visual acuity and intermediate vision, M Shpak et al. found that at both ends of the intermediate vision range, the model recommended by CIE has problems such as discontinuity and non-convergence, but only from the simulation aspect. The model makes recommendations and does not specifically study the range of mesopic vision

Images