What are the two major categories scientists use to classify optical illusions?
Answer
Physiological and cognitive
Illusions are typically split based on the origin of the perceptual error: physiological relates to physical sensory input issues, while cognitive relates to higher-level brain interpretation errors.

Related Questions
What is the fundamental experience of seeing an optical illusion?Sight is described as a dialogue between which two main components?What are the two major categories scientists use to classify optical illusions?Physiological illusions are directly caused by what aspect of the visual system?What is the direct physical cause of a negative afterimage?Where do cognitive illusions originate within the visual processing system?What term is used to describe the mental shortcuts the brain employs to make vision efficient?In the Simultaneous Contrast Effect, a medium-gray square placed next to pure white will appear how?What is the process called where the brain 'sees' a completed form from incomplete lines or shapes?In size constancy illusions involving perspective cues, what assumption does the brain automatically apply?