993.595.1: Candle Lamp Illuminator, 1852-1885

Additional Images

993.595.1: Candle Lamp Illuminator. Candle lamp illuminator fitted with 2 bulls eye condensing lenses of different focal length for direct and indirect retinoscopy
Image No. 876 Candle lamp illuminator fitted with 2 bulls eye condensing lenses of different focal length for direct and indirect retinoscopy; Photographer: Helen Kingsley

Object Description

Candle lamp illuminator fitted with 2 bulls eye condensing lenses of different focal length for direct and indirect retinoscopy. '14' stamped into top rim. Top missing. Design ascribed to John Evangelist Purkinji [1823].

Object Classification

Accession Number: 993.595.1
Collection: Diagnostic, Clinical
Date: 1852-1885

Object Dimensions

  • Height: 19.5 cm
  • Diameter: 6.9 cm

Object Parts

  • a) Tube with 2 lenses
  • b) Base with lead disc attached

Object Materials

  • copper alloy,
  • glass,
  • lead,
  • plating

Acquisition Detail

  • Owner: Dr. John R. Kellet M.B.E.
  • History of Use: To use with candle fitting (see 993.596.1). The light from the candle should always remain at the same height no matter how much of the candle has been burnt. In this case the candle flame is restricted to the middle of the bulls eye lenses for maximum effect. This is accomplished by having the candle contained in a tube with a spring under its base, the top end has an aperture less than the diameter of the candle so that only the wick and flame can penetrate it.