An interventional study of Presbyopic Glasses/ Intervention Group in Presbyopia, sponsored by Zhongshan Ophthalmic Center, Sun Yat-sen University. Not yet recruiting at 1 site in China. Open to participants aged 40 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2019-12-11.
Sponsored by Zhongshan Ophthalmic Center, Sun Yat-sen University · Not applicable, Interventional, and Prevention
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.
Sustainable development is considered to be a major development strategy to meet rapid economic and social development in China. China is one of the biggest manufacturing hubs in the world. With the rapid development of economy, the health of manufacturing workers is closely related to productivity. In some low-income developing countries, studies have focused on improving the health of manufacturing workers to improve productivity .Most of the studies focused on improving the nutritional intake of workers has a significant effect on improving work efficiency and productivity .
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.
336 studies on the registry are indexed under Presbyopia; 35 are open to participants now.
This study's planned enrollment of 136 is above the median of 61 across 276 interventional studies indexed under Presbyopia.
Browse Presbyopia studies →Zhongshan Ophthalmic Center, Sun Yat-sen University is the lead sponsor of 164 studies on the registry; 80 are open to participants now.
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Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Immediate provision of a free pair of spherical presbyopic glasses to correct the worker's vision for optimal working distance as measured before intervention.
Device: Presbyopic Glasses/ Intervention Group
Will be deferred to receive spectacles as above, after the 4 weeks evaluation period.
Immediate provision of a free pair of spherical presbyopic glasses to correct the worker's vision for optimal picking distance, astigmatism is corrected.
The rate of income change of textile workers
The rate of income change over baseline.
Time frame: 4 weeks
The quality of vision function
Secondary outcome will be the quality of vision function in both groups.National Eye Institute Visual Function Questionnaire-25 (NEI-VFQ-25 ) questionnaire will be used to measure the quality of vision function.For the NEI-VFQ-25, a composite score (25 items) and near activities sub score (two items) were created on 0-100 scales.
Time frame: 4 weeks
Percentage of glasses wear in intervention group, as well as the purchase and use of glasses in control group.
Independent compliance observation of wear of the study spectacles in the intervention group, self-reported purchase and use of glasses in the control group will be recorded.
Time frame: 4 weeks
Plan to share: No
No publications or documents are linked to this record.
This study is not yet recruiting, as verified in Dec 2019. You cannot join it, but the record below documents what was studied.
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