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LIGHT SHIELDING SYSTEM FOR AN ELECTRORETINOGRAM AND METHOD OF SHIELDING AT LEAST ONE EYE FROM INCIDENT LIGHT
WO21239697
A light shielding system configured to shield at least one eye of a patient from incident light for an electroretinogram comprising a substantially lighttight shielding box enclosing an inner space arranged to receive a hand held Ganzfeld stimulator, which box is mountable over the at least one eye of the patient; the box including at least one sleeve extending into the box to allow manipulation of the Ganzfeld stimulator.
Electroretinography (ERG) is an ophthalmologic diagnostic technique in which flash induced neuro responses are measured. The patient needs to remain in absolute darkness for 20 minutes before the ERG can be performed. For young patients, the discomfort of being in the dark is high and in practice these patients are anesthetized in an operating room. The operation room needs to be darkened, a lengthy procedure as too much light would influence the results of the ERG. On the other hand, working in the darkness is very impractical for both the ophthalmologist and the responsible anesthetist, and is therefore also influencing a correct diagnosis and patient monitoring. To overcome the problems related to the current way of working, a novel light shielding box has been developed. This box shields only the eyes, allowing the patient to remain in the dark without having to darken the whole operating room. At the same time, the ophthalmologist and anesthetist are not hindered by darkness when performing the ERG. For the comfort of the patient and control of the anesthetic procedure, the mouth and nose remain free. The box provides ample room for the ophthalmologist to perform all necessary actions to perform the ERG with maximum efficiency and correctness of the diagnosis. Via an infrared camera within the box connected to an external screen, the ophthalmologist can assure the correct manipulation and positioning of the equipment.