Aura Visual

Aura visual

***Visual aura*** is a clinical term that describes visual symptoms that occur when the eye remains unaccommodated for a long time. In 1844, it was first described by D. Stuart.

Apparently, it is impossible to talk about true visual auras that are pathognomonic for a certain disease, since visual auras are found in the clinical picture of various types of pathology of the central nervous system, in all cases accompanied by more or less significant visual impairment.

When analyzing the visual aura, the typical, characteristic features of its occurrence and manifestation are taken into account: precursors and corresponding violations of the color and radiation reflex, as well as various accompanying signs (convergence disturbance, decreased curvature of the lens, dilated pupil, decreased size of the eyeball).

G. Grosvenor's typology distinguishes the following five main types of visual auras by form:

- Aurora

Develops with a gradual increase in pathology. There are acute and chronic forms. Changes begin with concentric contractions until the pupils disappear. Then sharpening and folding develop, followed by the appearance of dots, small streaks and Luders dots (rays), which is characteristic of congestive and acute ischemia of the optic nerve. In patients with the initial stage of aurora, phosphenes periodically occur. This type of visual aura is the most favorable.