Flashcards
TERMS P&A CHAPTER 3: INTRODUCTION TO VISION
Cards in this deck (26)
- 1VISIBLE LIGHTBand of energy within the electromagnetic spectrum
- 2ELECTROMAGNETIC SPECTRUMContinuum of electromagnetic energy produced by electric charges and radiated as waves
- 3LIGHTConsisting of small pockets of energy (protons)
- 4CORNEATransparent covering of the front eye. Accounts 80% of eye´s focusing power but can´t adjust its focus
- 5WAVELENGTHDistance between the peaks of the electromagnetic waves
- 6HYPEROPIACondition which enables a person to see distant objects clearly but has trouble seeing nearby objects
- 7TRANSDUCTIONTransformation of light into electricity. Carried out by receptors
- 8RECEPTORSNeurons specialized for receiving environmental energy and transforming it into electricity
- 9RODS AND CONESReceptors for vision
- 10OPSINSLong stands of proteins which loop back and forth across the disc membrane 7 times
- 11ISOMERIZATIONChange in shape when a photon of light hits the retinal, so it´s stricking out from the opsin.
Triggers the transformation of the light entering the eye into electricity in the receptors - 12ENZYMESBiological chemical that in small amounts facilitates chemical reactions
- 13ENZYME CASCADESequence of reactions triggered by the activated visual pigment molecule
- 14BLIND SPOTArea in the retina where there are no receptors.
It is where the optic nerve leaves the eye - 15DARK ADAPTATIONProcess which causes the eye to increase its sensitivity in the dark
- 16DARK ADAPTATION CURVEPlot of how visual sensitivity changes in the dark, beginning with when the lights are extinguised
- 17ROD MONOCHROMATSPeople who have no cones due to a genetic defect
- 18ROD-CONE BREAKPlace where the rods begin to determine the dark adaptation curve
- 19VISUAL PIGMENT REGENERATIONProcess in which the retinal and opsin become rejoined. Occurs more rapidly in the cones that in the rods
- 20COLOURVisual pigment bleaching
- 21DETACHED RETINACondition in which visual pigment can ´t regenerate.
The retina has become separated from the pigment epithelium (where it rests on) - 22ABSORPTION SPECTRUMPlot of the amount of light absorbed by a substance vs. the wavelength of the light
- 23LATERAL INHIBITIONInhibition transmitted across the retina
- 24PERCEPTION OF LIGHTNESSPerception of shades ranging from white to gray to black
- 25BELONGINGNESSPrinciple which states that an area´s appearance is influenced by the part of the surrounding to which the area appears to belong
- 26NEURAL CONVERGENCEProperty that occurs when one neuron receives signals from many other neurons
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- PERCEPTION AND ATTENTION Flashcards on TERMS P&A CHAPTER 3: INTRODUCTION TO VISION, created by Nuria Nácher Soler on 28/12/2019.
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- Nuria Nácher Soler · Dec 2019
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- Dec 28, 2019
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