Which part of the eye contains photosensitive receptors that respond to dim light?

The rods are the part of the eye that contains photosensitive receptors specifically designed to respond to dim light. They are more sensitive to light compared to cones and allow for vision in low-light conditions, making them essential for night vision. Rods do not detect color, which is why our color perception diminishes in dim lighting. This attribute underscores their role in helping us navigate and perceive our surroundings in environments with scarce lighting.

Cones, on the other hand, are responsible for color vision and function best in bright light, allowing us to see fine detail and different colors. The pupils are the openings that control how much light enters the eye but do not contain photosensitive receptors themselves. The ciliary body is involved in focusing the lens and regulating the shape of the eye but, like the pupils, does not contain photoreceptors. Therefore, rods are the correct choice for their unique capability to detect light in dim conditions.