PROductivity Study of Presbyopia Elimination in Rural-dwellers (PROSPER)

Launched by CONGDON NATHAN · Jul 19, 2017

Keywords

ClinConnect Summary

Main research question being addressed: To establish, using a randomized, controlled design, the impact of near eyesight correction on the productivity of presbyopic agricultural workers in India, as measured by weight of tea picked.

Primary outcomes to be measured: Change in mean daily weight of tea picked per worker during a 12 weeks period after randomisation compared to a 4 weeks baseline period prior to randomisation. (See details below under Main Outcome.)

I. Background: Importance of research topic, Particular Features of setting Uncorrected presbyopia is an expensive problem for t...

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • Employee of APPL for 1 year
• • Aged \>= 40 years
• • Habitual near visual acuity of \>= 0.8M (\<=6/12) at 40cm in both eyes, correctable to \<=0.5M (\>=6/7.5) in both eyes with near glasses
• • Uncorrected distance vision \>= 6/7.5 in the better-seeing eye
• • The participant worked and has data available on weight of tea picked for \>=10 days in the previous 4 weeks (This will largely exclude men in this setting).
• • Ability to give informed consent
• Exclusion Criteria:
• • Eye disease detected on baseline eye exam
• • Current ownership of near correction capable of improving near visual acuity to \<= 0.8M (\>= 6/12) in either eye
• • Unlikely to complete follow-up due to unsatisfactory work performance, plans to move out of the area, etc.
• • Need for distance correction to achieve distance vision of \>= 6/7.5 in the better-seeing eye.
• • Inability to achieve best-corrected visual acuity with spherical power glasses only (that is: need for astigmatic correction to achieve best-corrected near visual acuity)
• • Persons with eye problems detected on the examination will be referred for definitive care at local facilities, and distance refractive errors will be corrected with free bifocals for those with uncorrected VA \< 6/12 in the better-seeing eye.