In which part of the eye can rods and cones be found?

Rods and cones are photoreceptor cells located in the retina, which is the innermost layer of the eye. The retina functions to convert light that enters the eye into electrical signals, which are then transmitted to the brain for visual processing. Rods are responsible for vision in low-light conditions and are sensitive to brightness, while cones are responsible for color vision and function best in bright light. This combination allows the retina to play a crucial role in our ability to see in various lighting conditions and perceive colors.

The other structures mentioned—iris, cornea, and optic disk—do not contain these photoreceptor cells. The iris controls the amount of light that enters the eye, the cornea helps to focus light, and the optic disk is where the optic nerve exits the eye, which does not have photoreceptors and is thus known as the blind spot. Understanding the role of the retina and its components is essential for comprehending how our visual system operates.