Author: Joseph Baxter. Linear, quadratic and exponential functions have different graphs, equations, and characteristics. In this tutorial, compare the shape of linear, quadratic, and exponential curves on a graph, and explore how to identify a function as linear, quadratic, or exponential by examining x- and y-coordinates. (more)
The tier of cells at the back of the retina contains the light receptors, the rods and cones. Rods, which are far more numerous than cones, are responsible for our vision in dim light and are out of commission in bright light.
1 the retina The retina is the inner layer of the eye. 2  It contains the light receptors, the rods and cones (and thus serves as the film of the eye). 3  The retina also has many interneurons that process the signals arising in the rods and cones before passing them back to the brain. This not only reduces the amount of light entering the eye but also improves its image-forming ability (as does stopping down the iris diaphragm of a camera). 2  the retina The retina is the inner layer of the eye. 3  It contains the light receptors, the rods and cones (and thus serves as the film of the eye).