Children's Glasses

Gunnar Akerskog; Jan Soderlund

doi:10.1117/12.956953

29 July 1980 Children's Glasses

Gunnar Akerskog, Jan Soderlund

Proceedings Volume 0166, NATO Symposium on Applications of Human Biostereometrics; (1980) https://doi.org/10.1117/12.956953
Event: NATO Symposium on Applications of Human Biostereometrics, 1978, Paris, France

Abstract

There is a common opinion among eye specialists and opticians that children's glasses often are not shaped for optimal fitting. A fundamental reason for this is the lack of data for the shaping of the bows, with the result that most children's glasses are reduced copies of adult's glasses. This report describes a photogrammetric method for collection of primary data for manufac-turing bows for children. An ordinary amateur camera was equipped with a stereo-adapter. With a few arrangements, such as projecting a pattern on the face and keeping the hair away from the ears, 600 children were photographed. A calibration photograph was exposed at the beginning and end of each film or when the equipment had been transported or otherwise disturbed. The photographs were measured in a stereocomparator and the coordinates analytically corrected for distortion. After determination of model coordinates the requested geometric information, such as pupillar distance, eye-ear distance, location of the bridge of the nose etc, was calculated. The shapes of average noses were presented as profile plots.

Citation Download Citation

Gunnar Akerskog and Jan Soderlund "Children's Glasses", Proc. SPIE 0166, NATO Symposium on Applications of Human Biostereometrics, (29 July 1980); https://doi.org/10.1117/12.956953

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