According to Dr. Blessing, the lighting of the nystagmus glasses is indirect, so no light reflection can occur, which leads to unwanted, nystagmus-inhibiting gaze fixation in the patient. Since the shielding of the lighted bulbs prevents direct illumination of the eye, no PURKINJE vein image is created, the movement of which randomly illuminated glasses can cause nystagmus, so a false positive nystagmus finding can be ruled out. The actual lighted glasses test is done in a dark room or heavily darkened room. The internal illumination of the glasses interrupts the optical contact of the patient with his environment (elimination of anti-nystagmus fixation). At the same time, strongly illuminated eyes can be observed particularly well under the magnifying glass. In many cases, abnormal nystagmus processes can be observed when looking straight ahead, which cannot or cannot be reliably detected even when looking to the side without glasses. This model allows wireless operation and can be used independently of the power supply. The power supply of the nystagmus glasses is provided by the fixed, top-mounted, adjustable battery handle, which is used to accommodate three 1.5 volt C LR14/AM-2 size batteries (baby cells). (The batteries are not included!). Through the adjustable battery handle, you can adjust the brightness individually by turning the switch slightly.
