PSYC 2220 Lecture Notes - Lecture 2: Ommatidium, Visual Acuity, Visual Cortex

• School: York University
• Department: Psychology
• Course: PSYC 2220
• Professor: Laurie Wilcox

Document Summary

Rod vision = less sharp/lower resolution, black and white. Information about the distal stimulus is carried by the light reflected from the distal stimulus into the eye. When the light reaches the retina, the proximal stimulus is formed. The electrical signals are transformed into a perception of a tree in the brain. Stimuli trigger a process that ends with perception occuring as a result of activity in the brain. The light is reflected and focused (by the lens and cornea) to create an image on the retina - proximal stimulus. Lens enables focus on the distal stimulus: receptor processes: transduction occurs at the receptors where light energy is transduced into electrical signals. Rods are less detailed/less sharp and black and white. The cones are sharp focus and in colour. The rods are used to see in dim light: neural processing - electrical signals travel through the network of neurons and perception occurs when the electrical signals are processed.