What happened to it when the light was flashed into eye?

When a light is flashed into the eye, several physiological and perceptual processes occur:

Pupillary constriction: The pupil of the eye, which is the black circular opening in the iris, constricts or becomes smaller in response to the sudden increase in light intensity. This constriction is a reflex action of the iris to reduce the amount of light entering the eye and protect the retina from potential damage.

Blinking: Blinking is a natural reflex that helps to moisten the surface of the eye and remove any foreign particles or debris. When a bright light is flashed into the eye, it can trigger a blink reflex to protect the cornea and the other delicate structures of the eye.

Photoreception: The retina, which is the light-sensitive layer at the back of the eye, contains specialized photoreceptor cells called rods and cones. These cells convert the light energy into electrical signals that are then transmitted to the brain through the optic nerve. When the light is flashed into the eye, these photoreceptor cells are activated, and the signals are sent to the brain for visual processing.

Perception of light: The brain receives and interprets the electrical signals from the photoreceptor cells, allowing us to perceive the light. The sudden flash of light is registered by the brain, and we become aware of the presence of light or a change in the visual environment.

Colour perception: Depending on the intensity and wavelength of the light, the brain may also process information related to colour and brightness. Different wavelengths of light correspond to different colours, and when a light is flashed into the eye, the brain interprets the specific wavelength to determine the perceived colour.

Dark adaptation: After the light is flashed into the eye, the retina needs time to adapt to the sudden change in light levels. This process of dark adaptation involves the regeneration of visual pigments in the photoreceptor cells, allowing the eye to regain sensitivity in low light conditions.

The specific reactions and perceptions experienced when a light is flashed into the eye may vary slightly from person to person and depend on factors such as the intensity and duration of the light, as well as individual differences in visual processing.