Overview

Transmission of Visual Signals

• Overview of transmission steps
• Availability and quality of ambient light
• Contrast with background
• Transmission from sender to receiver
• Signal detectability

Coupling from the Medium to the Receptor

• The evolution of light-collecting strategies
• Transparent lenses
• Focusing the light
• Controlling the amount of entering light

Reception of Visual Signals

• The visual pigment
• Photoreceptor cells
• The retina
• Resolution and sensitivity
• Field of view

Visual Processing

• Color vision
• Feature detectors
• Depth perception