Overview
This lecture explores how optical illusions demonstrate the brain's role in shaping what we see, emphasizing that perception is influenced by both biology and experience.
How We See
- Our vision is not a direct reflection of reality but an interpretation created by the brain.
- The brain uses past experiences to make sense of incoming visual information.
- Optical illusions reveal the brain's shortcuts and assumptions when processing visual data.
Role of Evolution and Experience
- Evolution has shaped the brain to interpret ambiguous sensory information for survival.
- Perception is adaptive, not always accurate, because it must be useful rather than literal.
- Cultural and individual experiences further influence how each person interprets what they see.
Insights from Optical Illusions
- Optical illusions work because the brain relies on context and prior knowledge to construct images.
- Color and light perception are affected by surrounding colors and light sources.
- The brain fills in gaps and can be tricked into seeing things that are not physically present.
Key Terms & Definitions
- Optical Illusion — a visual image that deceives the eyes and brain by appearing to differ from reality.
- Perception — the process by which the brain organizes and interprets sensory information.
- Context — the surrounding visual and experiential information that influences perception.
Action Items / Next Steps
- Reflect on how personal experiences may shape your perception of everyday scenes.
- Research additional optical illusions to observe how your own brain interprets them.