Vision is possible due to what structures that perceive light?

Vision is made possible by photoreceptors, which are specialized cells located in the retina of the eye. These cells are crucial as they convert light into electrical signals that can be interpreted by the brain, allowing us to see. Photoreceptors come in two main types: rods and cones, which serve different functions in vision.

Rods are responsible for vision in low light conditions and do not detect color, while cones are sensitive to bright light and are key for color vision and visual acuity. Although both rods and cones are essential components of photoreceptors, the term "photoreceptors" encompasses both types and accurately describes the overall structures that perceive light.

Lenses, on the other hand, play a role in focusing light onto the retina but do not perceive light themselves. They aid in directing light to the photoreceptors but are not involved in the process of converting light into electrical signals necessary for vision. Therefore, the term photoreceptors captures the complete essence of the structures responsible for perceiving light, making it the correct answer.