Because of the variation between individuals, and the inability for two observers to share a nearly identical stimulus, these phenomena are unlike most visual sensations. The blue field entoptic phenomenon or Scheerers phenomenon (after the German ophthalmologist Richard Scheerer, who first drew clinical attention to it in 1924) is the appearance of tiny bright dots (nicknamed blue-sky sprites) moving quickly along squiggly lines in the visual field, especially when looking into bright blue light such as the sky. I dont see how a 'clouding' of the lens would make me see more entoptic phenomena than a clear lens. He said the heightened blue field entotopic phenomena could be the result of posterior capsule opacification, which I can get checked locally.
This variance is not surprising because the specific aspects of the eye that produce these images are unique to each individual. The surgeon who did my two FOVs just phoned. Helmholtz comments on phenomena which could be seen easily by some observers, but could not be seen at all by others.
Because entoptic images are caused by phenomena within the observer's own eye, they share one feature with optical illusions and hallucinations: the observer cannot share a direct and specific view of the phenomenon with others. Hence, they are different from optical illusions, which are perceptual effects that arise from interpretations of the image by the brain. These perceptions are called entoptical." Entoptic images have a physical basis in the image cast upon the retina. In Helmholtz's words "Under suitable conditions light falling on the eye may render visible certain objects within the eye itself. is i s called the blue eld entoptic pheno menon or.
#Entoptic phenomena blue sprie pdf
Entoptic phenomenon Entoptic phenomena are visual effects whose source is within the eye itself. PDF On May 20, 2022, Miha Sevek and others published Entoptic phenomena, photopsias, phosphenes Entoptic phenomena, photopsias.
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