Disambiguation: Watches (timekeeping)
- Headaches and eye Pains can be attributed to staring at a monitor for too long without a proper break. Room and display brightness are significant factors.
People with Multiple sclerosis experience eye colour changes.
Attneave's Cat ∞
A series of 63 straight black lines on a white background, which shows how such simple information can describe a complex pattern. It demonstrates how vision is highly redundant and how we refer to a vast library whenever we look at things. He begins these lines at points of maximum curvature.
- Fred Attneave
Benham's top ∞
Benham's top, also called Benham's disk, is named after the English toymaker Charles Benham, who, in 1895, sold a top painted with the pattern shown. See picture [ 1 ] from http://faraday.physics.uiowa.edu/optics/6J11.11.htm
When the disk is spun, arcs of pale color are visible at different places on the disk. These are called called Fechner colors. Not everyone sees the same colors.
The phenomenon is not entirely understood. One possible reason people see colors may be that the color receptors in the human eye respond at different rates to red, green, and blue.
- Visual perception
- Night vision
- See also Sleep and dreaming