Question

the optic disc is known as the blind spot because only cones populate the optic disc photoreceptors are absent from the optic disc the fovea centralis prevents light from striking the optic disc only rods populate the optic disc

Explanation:

The optic disc is the point where the optic nerve exits the eye. Photoreceptors (rods and cones) are absent here. Since photoreceptors are responsible for detecting light and converting it into neural signals, their absence means that this area cannot detect light, making it a "blind spot". The fovea centralis is a different part of the retina (high - acuity area with many cones). And it's not about only cones or only rods populating the optic disc as there are no photoreceptors there at all.

Answer:

photoreceptors are absent from the optic disc