An observational study in Refractive Errors and Cataract, sponsored by Zhongshan Ophthalmic Center, Sun Yat-sen University. Not yet recruiting. Open to participants aged 0 Years to 100 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-12-02.
Sponsored by Zhongshan Ophthalmic Center, Sun Yat-sen University · Observational
To establish the baseline levels and monitor the progress of two newly introduced global eye health indicators in Xinxing County, including effective refractive error coverage (eREC) and effective cataract surgery coverage (eCSC). And to assess the prevalence and treatment status of common eye disease in Xinxing County.
Primary and secondary school students in Xinxing County and people covered by the national basic public health service, including children aged 0-6, seniors over 65 years old and diabetic patients, etc.
Exclusion Criteria:
Visual acuity
Test and record uncorrected visual acuity; if the participant wears glasses, measure the best corrected visual acuity with glasses. For participants with poor unaided or corrected visual acuity (\<4.7), perform additional pinhole visual acuity testing.
Time frame: through study completion, an average of 1 year
Strabismus
Assess strabismus status and angle at both near and distance fixation.
Time frame: through study completion, an average of 1 year
Autorefraction
Measure spherical power, cylindrical power, and axis in both eyes. Cycloplegia may be required in children, preferably using 1% tropicamide, one drop each time, three times. Before cycloplegia, check allergy history, medical history, and anterior chamber depth; inform guardians of potential risks and precautions related to cycloplegia, and ensure that guardians accompany the child throughout the procedure.
Time frame: through study completion, an average of 1 year
Questionnaire
Questionnaires on demographics, disease histories and etc.
Time frame: through study completion, an average of 1 year
Fundus examination
Examine the retina of both eyes and document any retinal pathology. If pupils are too small, mydriasis may be required, following the same drugs and procedures as above.
Time frame: through study completion, an average of 1 year
Anterior segment examination
Use a slit lamp to examine eyelids, conjunctiva, cornea, anterior chamber, and lens in both eyes. Record any abnormalities. Grade lens opacities according to the LOCS III classification system.
Time frame: through study completion, an average of 1 year
No study locations are listed for this record.
Plan to share: No
No publications or documents are linked to this record.
This study is not yet recruiting, as verified in Sep 2025. You cannot join it, but the record below documents what was studied.
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Zhongshan Ophthalmic Center, Sun Yat-sen University