Examination methods for glaucoma prevalence surveys

Arch Ophthalmol. 1993 Oct;111(10):1409-15. doi: 10.1001/archopht.1993.01090100117038.


Objective: To perform a pilot evaluation of new examination methods for the detection of glaucoma and other causes of visual impairment in rural East Africa.

Design: Testing was performed by local eye nurses after a brief training course. Two novel tests of visual function were used, a scotopic sensitivity test and a visual field test performed on a laptop computer. The optic disc was examined with direct ophthalmoscopy after pupillary dilation and compared with standard photographs on a laminated card. Intraocular pressure was measured with a hand-held, electronic tonometer.

Setting: Rural Tanzania.

Participants: One hundred twenty adult villagers.

Results: The visual function tests could be performed on more than 90% of subjects, and the results were correlated with the size of the optic disc cup, an objective measure of glaucoma injury.

Conclusions: This survey shows the practicality of instrument-based testing of visual function under field conditions.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adult
  • Aged
  • Female
  • Fundus Oculi
  • Glaucoma / diagnosis
  • Glaucoma / epidemiology*
  • Humans
  • Intraocular Pressure
  • Male
  • Middle Aged
  • Optic Disk / pathology
  • Prevalence
  • Tanzania / epidemiology
  • Tonometry, Ocular
  • Vision Disorders / diagnosis
  • Vision Screening / methods*
  • Visual Acuity
  • Visual Fields