A case in point. Utilizing the Visual Evoked Response (VER) for visual fields when subjective responses are not attainable.
D002648:Child; D004569:Electroencephalography; D005071:Evoked Potentials; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000503:physiopathology; D009778:Occipital Lobe / Q000503:physiopathology; D014057:Tomography, X-Ray Computed; D014786:Vision Disorders / Q000175:diagnosis* / Q000503:physiopathology; D058609:Visual Field Tests / Q000379:methods; D014794:Visual Fields