A device and a method for investigation of the visual assessement of alternating luminous areas (VAALA) (1) was created and patented by a group of the Departement of Neurology, Medical University of Varna: Assoc. Prof. D. Mintchev, MD, PhD, Assoc. Prof. N. Deleva, MD, PhD, A. Tzukeva, MD, together with Assoc. Prof. Eng. S. Slavchev, PhD, of the Technical University ofVarna.
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