Physiology of Light Flashcards
(51 cards)
____ is the scientific study of functions and
mechanisms in a living system. As a sub-discipline of
biology, physiology focuses on how organisms, organ
systems, individual organs, cells, and biomolecules carry out
the chemical and physical functions in a living system
Physiology
What are some negative effects light has on us?
Eyestrain, headaches, dizziness, skin
cancer, and premature aging of skin and eyes
light affects our?
Biorythms, hormones, and behavior
____ _____ coordinates bodily functions for being awake and sleeping
Circadian Rythm
_____ ____ m is an internal body rhythm that
cycles approximately every 24 hours
Circadian Rhythm
Circa means?
about
Dia means?
Day
Our ___ _____ regulates our biological processes to allow our bodies to conserve resources.
Circadian Clock
_____ _____ is lighting that is designed to have a biological impact on the human circadian system
Circadian Lighting
Daytime napping can lead to?
The development of Parkinson’s later in life
________, a G family coupled receptor, found within the ganglion cell layer in the retina, plays an important role in non-image-forming visual functions, including hormone secretion, entrainment of circadian rhythms, cognitive and affective processes.
Melanopsin
What does ipRGCs stand for?
Intrinsically photosensitive retinal ganglion cell
______ ______ defines the Magnitude of Human Circadian Light
Melanopic Illuminance
WELL Building Standard has adopted melanopic lux in Feature ___ of their Light Concept.
L03
120, 150, 180, 240 vertical melanopic lux
for a minimum of 4 hours per day.
is what Well Building standard?
L03: Circadian Lighting Design
Fixtures have a luminance less than
10,000 cd/m2 between 45 °- 90° from
nadir, and/or an intensity of less than
1,000 candela between 45 °- 90° from
nadir. is what WELL building standard?
L04: Electric Light Glare Control
Problems related to circadian rhythms are
associated with
SAD (Seasonal Affective Disorder
_____ A condition associated with an individual’s
inadequate exposure to sunlight
SAD
Effects of _____: Depression, weight gain, lack of concentration, and sleeplessness
SAD
Dimentia sufferers affected by daylight change at
end of day can be defined as?
Sundowning
____ _____ successful in helping to regulate biological clock associated with circadian rhythm
Light therapy
How many people in the US have a visual impairment?
16 million
What does AMD stand for?
Age-related macular degeneration (AMD)
Decrease in eye’s elasticity and thickening of the lens.
Affects visual acuity and the ability to see objects at
close range
Are all symptoms of?
Presbyopia
