Temporal Vision Flashcards
What is the type of summation and resolution found in the scotopic and photopic system?
- Scotopic: Good summation, Poor resolution
2. Photopic: Poor summation, Good resolution
This law states total temporal summation occurs as long as the threshold number of quanta are delivered within a critical duration period.
Bloch’s law
What is the critical duration period in the scotpic and photopic system?
Scotopic = 100msec Photopic = 10msec
Shallow modulations depth =
no flicker
Large modulation depth =
flicker
As trolands increase (brighter), what happens to the CFF?
CFF increases = CFF is directly proportional to the log of the stimulus luminance
This states flashes of pulse duration of 50-100msec are perceived as brighter than stimuli with duration of less than or more than this value
Broca-Sulzer
This states a flickering light appears brighter than a steady light
Brucke-Bartley effect
This states a flicker is more likely to be perceived if the stimulus area is larger
Granit and Harper Effect
The troxler effect is due to low what?
Low spatial contrast and low frequency
Where is CFF the highest
Central vision/fixation
