PSY100H1 Chapter Notes - Chapter 4.2: Trichromacy, Occipital Lobe, Thalamus
65
PSY100H1 Full Course Notes
Verified Note
65 documents
Document Summary
The primary function of the eye is to gather light and change it into an action potential. Light travels in waves that vary in terms of 2 different properties: length and amplitude. The term wavelength refers to the distance between the peaks of a wave, different wavelengths correspond to different colours. Amplitude refers to the height of a wave. The hue (colour of spectrum), intensity (brightness) and saturation (colourfullness or density). It is in the eye that this transformation from sensation to perception takes place. The sclera is the white, outer surface of the eye. The cornea is the clear layer that covers the front portion of the eye and also contributes to the eyes ability to focus. The pupil regulates the amount of light that enters by changing its size; it dilates (expands) to allow more light to enter and constricts (shrinks) to allow less light into the eye.
