Blue field entoptic phenomenon

Ocular Blood Flow and Metabolism

Published in Neil T. Choplin, Carlo E. Traverso, Atlas of Glaucoma, 2014

Alon Harris, Leslie Abrams Tobe, Brent Siesky

Blue field entopic techniques are founded on the blue field entoptic phenomenon. This phenomenon is based on the observation of leukocytes flowing through the subject’s own retinal macular vasculature. These methods can be used for a noninvasive, subjective evaluation of perimacular hemodynamic parameters but are not often utilized because the technique is based on the assumption that macular capillaries have a fixed diameter while, in reality, large variations between patients exist. Also, data is limited to the perifoveal anatomical region and depends on the patient’s cooperation and perception.

Transient vision loss: a neuro-ophthalmic approach to localizing the diagnosis

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Journal Information

Published in Expert Review of Ophthalmology, 2018

Helen Chung, Jodie M. Burton, Fiona E. Costello

Patients with ‘visual snow’ often compare their perceptual disturbances to viewing a badly tuned analog television [39]. More specifically, affected individuals describe a multitude of tiny dots in the entire visual field, often flickering between black and white. Symptoms of visual snow tend to be continuous (not transient) and persist whether the eyes are open or closed [39]. Yet, many patients with visual snow report other transient visual symptoms, including: palinopsia, exaggerated entoptic phenomena (floaters, blue field entoptic phenomenon, spontaneous photopsia), photophobia, and nyctalopia (impaired night vision), which may recover acutely, subacutely, or chronically over time [3].

Blue field entoptic phenomenon

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Ocular Blood Flow and Metabolism

Transient vision loss: a neuro-ophthalmic approach to localizing the diagnosis