[Remarks on W. Matthaeus's article: "Goniophotography with an electronic flash apparatus and the van Beunigen pyramidal gonioscope].
D004581:Electronics; D004864:Equipment and Supplies; D006068:Gonioscopy; D006794:Household Articles; D009887:Ophthalmoscopy / Q000600:supply & distribution*
OPHTHALMOSCOPY/equipment and supplies