Is Ocular Accommodation Influenced by Dynamic Ambient Illumination and Pupil Size?

Hanyang Yu; Wentao Li; Ziping Chen; Mengzhen Chen; Junwen Zeng; Xijiang Lin; Feng Zhao

doi:10.3390/ijerph191710490

Is Ocular Accommodation Influenced by Dynamic Ambient Illumination and Pupil Size?

Int J Environ Res Public Health. 2022 Aug 23;19(17):10490. doi: 10.3390/ijerph191710490.

Authors

Hanyang Yu¹, Wentao Li², Ziping Chen³, Mengzhen Chen³, Junwen Zeng¹, Xijiang Lin⁴, Feng Zhao¹

Affiliations

¹ State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China.
² Huizhou Third People's Hospital, Guangzhou Medical University, Huizhou 516000, China.
³ Guangdong Wlight Visual Health Research Institute, Guangzhou 510150, China.
⁴ Educational Equipment Center of Guangdong Province, Guangzhou 510240, China.

Abstract

Purpose: We investigated ocular accommodative responses and pupil diameters under different light intensities in order to explore whether changes in light intensity aid effective accommodation function training.

Methods: A total of 29 emmetropic and myopic subjects (age range: 12-18 years) viewed a target in dynamic ambient light (luminance: 5, 100, 200, 500, 1000, 2000 and 3000 lux) and static ambient light (luminance: 1000 lux) at a 40 cm distance with refractive correction. Accommodation and pupil diameter were recorded using an open-field infrared autorefractor and an ultrasound biological microscope, respectively.

Results: The changes in the amplitude of accommodative response and pupil diameter under dynamic lighting were 1.01 ± 0.53 D and 2.80 ± 0.75 mm, respectively, whereas in static lighting, those values were 0.43 ± 0.24 D and 0.77 ± 0.27 mm, respectively. The amplitude of accommodation and pupil diameter change in dynamic lighting (t = 6.097, p < 0.001) was significantly larger than that under static lighting (t = 16.115, p < 0.001).The effects of light level on both accommodation and pupil diameter were significant (p < 0.001).

Conclusion: Accommodation was positively correlated with light intensity. The difference was about 1.0 D in the range of 0-3000 lux, which may lay the foundation for accommodative training through light intervention.

Keywords: accommodation; dynamic illumination; myopia; pupil size; vision therapy.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Accommodation, Ocular*
Adolescent
Child
Humans
Lighting*
Pupil / physiology
Refraction, Ocular
Vision Tests

Grants and funding

This work was supported by the Science and Technology Planning Project of Guangdong Province (2016A040403016), the Science and Technology Project of Guangzhou (202102020886) and the China educational equipment industry association (CEFR20001K1). The founders had no role in the study design, the data collection and analysis, the decision to publishor the preparation of the manuscript.