Aim: To document the detection of significant ocular pathology by a vision centre technician in an emerging economy World Health Organization recommended eye care delivery setting, and determine whether a frequency-doubling perimeter (FDT) improves that performance.
Material and methods: Consecutive patients above the age of 12 years attending a vision center were included. A vision technician (VT) determined visual acuity and performed slit lamp examination, applanation tonometry and undilated fundus examination followed by a 20-1 FDT screening test. VT and FDT findings were compared to the gold standard of masked comprehensive examination by an ophthalmologist. Sensitivity, specificity and predictive values were calculated.
Results: 1764 of 1829 patients fulfilling the inclusion and exclusion criteria were analysed. The VT had sensitivity and specificity of 68 % and 90 % for detection of significant ocular disease; corresponding values for FDT alone were 87.8 % and 79 %. Seventy-one of the 115 patients having significant ocular pathology missed by the vision technician were detected by FDT. A positive finding by the vision technician and/or positive FDT had a positive predictive value of 47%.
Conclusions: An examination by a vision center technician within the accepted WHO model may usefully leverage limited ophthalmological capacity in emerging economies. Adjunctive FDT testing may further improve VT referral efficiency.
Statistics from Altmetric.com
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.