PSYCH 1XX3 Lecture Notes - Lecture 5: Visual Acuity, Ganglion Cell, Peripheral Vision
Document Summary
Cones are designed to operate at high light intensities and are primarily used for day vision. The cones provide us with the sensation of colour and provide good visual acuity, or sharpness of detail. Cones become more concentrated toward the fovea, a tiny spot in the middle of the retina that contains exclusively cones. When you want to see something in detail, we move our eyes so that the image falls directly onto the fovea. Good visual acuity, 6 million in the eye, good for daytime. The ability of cones to process colour does not increase their visual acuity. Designed to operate at low light intensities and so are primarily used for night vision. Provide no color information and offer poor visual acuity. No rods in the fovea itself, with increasing concentration in the region just surrounding the fovea. This arrangement makes rods very useful for peripheral vision (outer/edge area)
