title: Portable battery-powered indirect ophthalmoscope for field surveys.
abstract: Portable indirect ophthalmoscopy is a useful adjunct to field surveys and rural eye care in developing nations. The method for converting an electrically-powered indirect ophthalmoscope to a portable battery-powered unit is described.
mesh_terms: D003906:Developing Countries; D011211:Electric Power Supplies; D006801:Humans; D019721:Ophthalmoscopes; D012423:Rural Health