Visual receptors that respond to lower light intensities and give rise to achromatic sensations, cones.
A stick shape with rounded ends.
One of two types of light-sensitive cell in the retina of the eye. Rods are sensitive to dim light, but not to colour.
Cells in the retina that are responsible for vision in dim light.
Rhodopsin-containing cylindrical element of the retina that functions in detecting low light.
Light-sensitive cell; sensitive to all levels of light but not to color.
One of the two types of light-sensitive cells in the retina of the eye (compare cone). The human eye contains about 125 million rods, which are necessary for seeing in dim light. They contain a pigment, visual purple (rhodopsin), which is broken down (bleached) in the light and regenerated in the dark. Breakdown of visual purple gives rise to nerve impulses; when all the pigment is bleached (i.e. in bright light) the rods no longer function.
In the realm of vision, there exists a specialized type of photoreceptor that possesses an exceptional sensitivity to dim light conditions. This remarkable photoreceptor, known for its ability to transmit images in varying shades of gray, plays a crucial role in our visual perception.
Rods are one of the two specialized nerve cell varieties located in the retina, the light-sensitive layer at the back of the eye. They are responsible for transforming light energy into nerve signals. Notably, rods are extremely sensitive and capable of responding to very low levels of light.