What factor will affect vision?

flicker light

Pupils will dilate at dark place and will constrict at a bright place. Pupils will dilate and constrict with the variation of the flicker light. Eye muscles become fatigue,

or even loose and cannot adjust pupils to see distant object leading to myopia.For high frequency flicker light.Hospital of Nantong University in China found myopia can be induced by low frequency "flicker light" in B6 mice. Forty-five 28-day-old C57BL/6 (B6) mice were randomly assigned to three groups: control group, "flicker light" stimulation group and form deprivation (FD) group. Mice in the control group were raised under 250 lux illumination from 8:00 a.m. to 8:00 p.m. Mice in the "flicker light"group were raised under illumination with a duty cycle of 50% at a flash rate of 2 Hz from 8:00 a.m. to 8:00 p.m. for 6 weeks. After 6 weeks' exposure to "flicker light", the flicker light stimulation group became more myopic compared with the control group.

La Trobe University in Anstralia found low frequency temporal modulation of light promotes a myopic shift.

Peak strong light irradiate the retina. Retina degeneration is produced.

Ultraviolet, infrared, hazard blue light

Ultraviolet cause cataract, infrared cause retinal damage, hazard blue light cause macular degeneration.

table theory table

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Lamps and impact on health

low frequency flicker light: cause myopia

infra red:continuous wave retinal damage; lens protein denaturation

high frequency flicker light: retinal degeneration

peak strong light on retina: photoreceptor cell damage

ultra violet: cataract

high frequency flicker light: retina degeneration

unsafe blue light: macular degeneration

strong green or red light: cause myopia