2. Rods vs cones Rods - large current change with a single photon
Cones - smaller current change, compared to noise.

3. Rods vs cones Cones do not saturate at high illumination.
Cones adapt more to high illumination than rods

4. circuits Rods and cones can transmit to the same ganglion cell.
Rods synapse onto rod bipolar cells
Rod bipolar cells synapse onto amacrine cells
Amacrine cells onto cone bipolar cells
Cone bipolar cells synapse onto ganglion cells
This is a convergent pathway, lots of rods converge onto a rod bipolar cell, lots of rod bipolar cells converge onto an amacrine cell.

6. Circuits Cone system is less convergent
Single cone in central retina --> one cone bipolar cell
--> midget ganglion cell

8. Circuits Convergent rod system is a sensitive detector of light
Less convergent cone system maximizes acuity (resolution)

9. fovea