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. 1980 Aug;51(8):741-5.

The evolution of the broken ring visual acuity test figure

J S Pointer, G Gilmartin, J R Larke
  • PMID: 7440874

The evolution of the broken ring visual acuity test figure

J S Pointer et al. J Am Optom Assoc. 1980 Aug.

Abstract

The evolution of the broken ring visual acuity figure is described, with particular reference to the contributions of Snellen and Landolt. Reference is also made to its recent application in a study of visual performance, where an angular version of the figure is generated on a television screen.

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