Productivity Study of Presbyopia Improvement in Textile Workers (NCT04172935) | Clinical Trial Compass
Not Yet RecruitingNot Applicable
Productivity Study of Presbyopia Improvement in Textile Workers
China136 participantsStarted 2019-12-13
Plain-language summary
To establish, using a randomized, controlled design, the impact of near vision correction on the productivity of presbyopic textile workers in China, as measured by the change of monthly income.
Who can participate
Age range40 Years
SexALL
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Inclusion Criteria:
* Employee of E-square for 6 months;
* Aged \>= 40 years;
* Quantifiable near visual task workers;
* Habitual near visual acuity of \>= 0.8M (\<=6/12) at 40cm in both eyes, correctable to \<=0.5M (\>=6/7.5);
* Near correction spherical equivalent refractive error \>= +0.50D or astigmatism \<-1.00D;
* Asthenopia symptoms reported ( Asthenopia questionnaire score \>= 16) Ability to give informed consent
Exclusion Criteria:
* Ocular surgery done in the past 3 months;
* 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.
What they're measuring
1
The rate of income change of textile workers
Timeframe: 4 weeks
Trial details
NCT IDNCT04172935
SponsorZhongshan Ophthalmic Center, Sun Yat-sen University