This course will provide an introduction to sensation and perception, with an emphasis on the psychology of seeing. We come to know about the world through our physical senses (e.g. eyes, ears) and we use to take this ability for granted. However, sensation is only half the story; perception is a different process. How do we transfer the physical energy (e.g. light) from the environment in our brain to give rise to a perceptual experience? The course aims at providing basic knowledge of sensory mechanisms, exploring the relationship between the physical world and our perceptual experiences, the anatomy and physiology of the parts of the brain responsible for processing perceptual information, discussing different psychophysics method to measure subjective perceptual experience and perceptual sensitivity, and the mechanisms that give rise to the perceptual experience, such as illusions, and perceptual abnormalities.