• Number of Americans with sleep disorders: 50 to 70 million

• Photoreceptor Peak Sensitivities:
  • ipRGC: 480 nm (teal-blue)
  • Rods: 498 nm (blue-green)
  • Cones: 555 nm (green-yellow)

Notes/Comments:

• Mnemonics:
  • Think of photoreceptions being ordered from least sophisticated to most:
    • ipRGC  = light for circadian entrainment, without spatial resolution
    • Rods = black and white vision (dim light)
    • Cones = color vision
  • Think of color as progressing from blue-ish to green-ish to yellow-ish
  • Think of the peak wavelengths as rounded to 480 nm, 500 nm, 550 nm