Purkinje Tree, Maxwell's spot, Haidinger's brush, Moore's lightning streaks, and Retinal phosphenes are all examples of which phenomenon?

The correct identification of these phenomena as entoptic phenomena stems from their origin being within the eye itself. Entoptic phenomena are visual sensations that are generated by the structures and processes of the eye, and they are usually experienced when one is observing a bright or uniform background.

For instance, the Purkinje tree refers to the shadows cast by the blood vessels in the retina as one looks at a bright light, illustrating how the internal structures can influence perception. Maxwell's spot is another entoptic phenomenon where one perceives a small, yellowish spot in the visual field that is caused by the varying sensitivity of the cone cells in the retina, particularly against a blue background.

Haidinger's brush is seen when viewing polarized light and is due to the arrangement of the cone cells in the retina, which allows the viewer to perceive the brushes of light. Moore's lightning streaks occur when flashes of light are perceived, typically attributed to electrical activity or stimulation of the retina or cortex. Lastly, retinal phosphenes are the perception of light without actual light stimulation, often produced by pressure on the eye.

These phenomena all highlight how visual perception is influenced by the inner workings of the retina and visual system, reinforcing the understanding that they are classified under ent