Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025
Definition
Opsin is a protein found in the photoreceptor cells of the retina that binds to a light-absorbing molecule, allowing the photoreceptors to respond to light. This reaction is fundamental in the conversion of light into visual signals for the brain.
The light-sensitive layer at the back of the eye that contains cells responsive to light, enabling vision.
Visual signal transduction: The process by which light exposure is converted into electrical signals in the visual system, ultimately leading to visual perception