What is the fungtion of rods …

<font face="Times New Roman, Times, serif"><font size="+1">There are two types of photoreceptors in the human retina, rods and cones.</font></font>

<font face="Times New Roman, Times, serif"><font size="+1">Rods are responsible for vision at low light levels (scotopic vision). They do not mediate color vision, and have a low spatial acuity.</font></font>

<font face="Times New Roman, Times, serif"><font size="+1">Cones are active at higher light levels (photopic vision), are capable of color vision and are responsible for high spatial acuity. The central fovea is populated exclusively by cones. There are 3 types of cones which we will refer to as the short-wavelength sensitive cones, the middle-wavelength sensitive cones and the long-wavelength sensitive cones or S-cone, M-cones, and L-cones for short.</font></font>

<font face="Times New Roman, Times, serif"><font size="+1">The light levels where both are operational are called mesopic.</font></font>