title: Tangent screen perimetry using twin test objects.
abstract: A T-shaped carrier with twin test objects is an inexpensive efficient visual field screening device which facilitated identification of a nasal steppe, a paracentral scotoma, an enlarged blind spot, an arcuate scotoma, macular sparing, or hemianopic defects.
mesh_terms: D001927:Brain Diseases / Q000175:diagnosis; D002540:Cerebral Cortex; D005901:Glaucoma / Q000175:diagnosis; D006423:Hemianopsia / Q000175:diagnosis; D006801:Humans; D008266:Macula Lutea; D012164:Retinal Diseases / Q000175:diagnosis; D012607:Scotoma / Q000175:diagnosis; D058609:Visual Field Tests; D014794:Visual Fields