Halos are another phenomena reported by laser eye surgery patients, particularly at night. Halos are usually seen as huge globes of illuminated fog surrounding sources of light. Sometimes the globes seem to contain other globes, brighter and denser, nested two or more levels deep. From a simulation perspective, starbusts and halos exist on a continuum, with starbursts shading into halos as the rays become less distinct and diffuse into each other.
See Also: Images of Halo
1. Use the sliders to change the halo size or opacity.