Blue Light Flashcards
Red Light wavelength range
622-760 nm
Orange Light wavelength range
597-622 nm
Yellow Light wavelength range
557-597 nm
Green Light wavelength range
492-557 nm
Blue Light wavelength range
455-492 nm
Violet Light wavelength range
380-455 nm
High Energy Visible (HEV) wavelength range
380-500 nm
You and a patient are discussing blue light and he asks you what benefits blue light brings. What benefits would you tell him?
Blue light can help give the best acuity, contrast, and color.
It can help regulate the sleep cycle.
Better memory/mood, hormone balance, and regulate pupil size.
What wavelength range is considered to disrupt circadian rhythm? What color is this?
460-490 nm (Blue Turquoise)
What wavelength range is most harmful to retinal cells? What is the wavelength that is most harmful?
415-455 nm
435-440 nm is the most harmful (Blue-Violet)
What percent of UVA reaches the retina?
1.5%-2%
What photopigment does Intrinsically photosensitive retinal ganglion cells (ipRGCs) contain?
Melanopsin
What does Intrinsically photosensitive retinal ganglion cells (ipRGCs) suppress?
They suppress melatonin secretion when activated by blue light.
What is the nerve pathway to the pineal gland for Intrinsically photosensitive retinal ganglion cells (ipRGCs)?
Intrinsically photosensitive retinal ganglion cells (ipRGCs)
Suprachiasmal nucleus
Superior cervical ganglion
Pineal gland (melatonin secretion)
What is the nerve pathway for pupillary constriction/dilation?
Edinger-Westphal nucleus
Ciliary ganglion
Iris
