Productivity Study of Presbyopia Improvement in Textile Workers
NCT ID: NCT04172935
Last Updated: 2019-12-11
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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NOT_YET_RECRUITING
NA
136 participants
INTERVENTIONAL
2019-12-13
2049-12-31
Brief Summary
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Detailed Description
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As the global aging is becoming an critical issue for both health and economics, the health of the working population over the age of 45 is of greater concern in low - and middle-income developing countries. China has a workforce of 980 million people (aged 15 to 60). Urban workers and blue-collar workers account for nearly 310 million. With the aging population increased, presbyopia is becoming more and more serious, and it also affects the labor group that needs to work in close proximity. Studies have proved that refractive correction for tea pickers with old vision can effectively improve the yield of tea pickers and increase personal income.Because Guangdong area textile industry is developed, textile worker population is large. Most front-line textile workers need to work in close proximity for a long time, and the problem of aging productivity is increasingly obvious. At present, no relevant studies have explored whether presbyopia affects the work efficiency of textile workers who work in close proximity.
In this study, a randomized controlled clinical study will be conducted on front-line textile workers with presbyopia to explore whether refractive correction can improve labor income and relieve symptoms of visual fatigue for textile workers aged 40 years or above who work in the front-line.
Conditions
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Keywords
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Study Design
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RANDOMIZED
PARALLEL
PREVENTION
NONE
Study Groups
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Presbyopic Glasses/ Intervention Group
Immediate provision of a free pair of spherical presbyopic glasses to correct the worker's vision for optimal working distance as measured before intervention.
Presbyopic Glasses/ Intervention Group
Immediate provision of a free pair of spherical presbyopic glasses to correct the worker's vision for optimal picking distance, astigmatism is corrected.
Control Group
Will be deferred to receive spectacles as above, after the 4 weeks evaluation period.
No interventions assigned to this group
Interventions
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Presbyopic Glasses/ Intervention Group
Immediate provision of a free pair of spherical presbyopic glasses to correct the worker's vision for optimal picking distance, astigmatism is corrected.
Eligibility Criteria
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Inclusion Criteria
* 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
* 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.
40 Years
ALL
Yes
Sponsors
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Zhongshan Ophthalmic Center, Sun Yat-sen University
OTHER
Responsible Party
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Principal Investigators
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Yangfa Zeng, Master
Role: STUDY_DIRECTOR
Zhongshan Ophthalmic Center, Sun Yat-sen University
Locations
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Gaoming, Foshan, Guangdong
Foshan, Guangdong, China
Countries
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Central Contacts
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Facility Contacts
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Yuting LI, Master
Role: primary
Qianyun Chen, bachelor
Role: backup
Other Identifiers
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SYSU-OPH-005
Identifier Type: -
Identifier Source: org_study_id