from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A small, jerky eye movement that is a part of normal vision when fixating on an image, which seems to play a role in visual perception.
Instead, the eye wanders in a rather random-looking pattern that combines a bit of drift and tremor with small, sudden "saccades" that, being tiny, get branded by the uber-jargon term "microsaccade."
Later playbacks revealed that microsaccade - unconscious eye movements that take place on a very small scale - are directly responsible for the way the brain perceives images, when people look at optical illusions.
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