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Visual Acuity and Self-Reported Visual Function among Migrant Farmworkers.

Sara A Quandt1, Mark R Schulz, Haiying Chen

  • 1*PhDDepartment of Epidemiology and Prevention, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina (SAQ); Department of Public Health Education, University of North Carolina-Greensboro, Greensboro, North Carolina (MRS); Department of Biostatistics, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina (HC); Department of Family and Community Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina (TAA); and Center for Worker Health, Wake Forest School of Medicine, Winston-Salem, North Carolina (SAQ, HC, TAA).

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|September 27, 2016
PubMed
Summary
This summary is machine-generated.

Many farmworkers lack vision screenings, and self-reports don't accurately reflect visual acuity. Regular vision screening is crucial for this population to prevent occupational injuries.

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Area of Science:

  • Ophthalmology
  • Occupational Health
  • Public Health

Background:

  • Farmworkers face significant occupational injury risks due to visual impairment.
  • Limited access to vision care and low rates of prior vision screening are prevalent in this population.
  • Previous research indicates high rates of self-reported eye ailments and poor vision among farmworkers.

Purpose of the Study:

  • To describe farmworker visual health using standardized visual acuity screening data and self-reported visual function.
  • To compare objective screening data with subjective self-reported visual function.
  • To evaluate the accuracy of self-reported vision in this demographic.

Main Methods:

  • Cross-sectional study of 289 Latino migrant farmworkers in North Carolina.
  • Recruitment utilized methods to ensure a representative sample of a hard-to-reach population.
  • Visual acuity assessed using Snellen Tumbling E charts for distance and near vision; binocular data reported. Interviews collected personal characteristics and self-assessed visual function.

Main Results:

  • Approximately 75% of farmworkers reported never having had a vision screening.
  • Moderate to severe visual impairment (>20/40) detected in 1.7% for distance vision and 6.9% for near vision.
  • Farmworkers self-reported poorer visual function than objective screening indicated; sensitivity of self-reports was low (60% distance, 20% near), but specificity was high.

Conclusions:

  • Confirms low rates of vision screening among farmworkers.
  • Visual impairment findings for distance vision are comparable to other US Latino populations.
  • Self-reports are not sensitive indicators of visual acuity; vision screening is essential to identify risks for occupational safety in this health-disparate group.