The presence or absence of different entoptic phenomena can raise red flags for posterior and anterior abnormalities, and even refractive and convergence conditions-making them potential markers of disease presence and progression.Įntoptic phenomena were first described by Johann Purkinje in the early 1800s, to describe the fleeting, black afterimage of retinal vasculature, later coined the ‘Purkinje tree’ 4. Entoptic phenomena has been historically used to determine the photoreceptive layer of the retina and raised some intriguing questions about the nature of the visual process 1. When coming from in front, this motion is not always necessary, and the light may also be replaced by a small opening in a black screen while looking at a bright white wall. The entoptic phenomenon is usually brought about by shining a focused light such as from a penlight or a hand‐held ophthalmoscope on the sclera, or in front of the pupil, and then rapidly moving it back‐and‐forth 1. The most well-known entoptic phenomenon is Moore’s lightning streaks, which are seen when vitreous liquefaction produces retinal traction, resulting in photopsias often referred to as flashes of light 3. Blue field entoptic phenomenon treatment Entoptic phenomenaĮntoptic phenomena is a phrase derived from the Greek words ‘inside’ and ‘light’ or ‘vision’ was introduced by Johann Benedict Listing (1808 – 1882), which describes the ability of an individual to perceive substances endogenous to their own eye, such as retinal vessels or vitreous opacities 1. Entoptic phenomena refer to positive visual phenomena generated from physiologic or pathologic processes within the eye 2.
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