An observational study in Binocular Vision Disorder, sponsored by Zhongshan Ophthalmic Center, Sun Yat-sen University. Status unknown at 1 site in China. Open to participants aged 18 Years to 35 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-12-01.
Sponsored by Zhongshan Ophthalmic Center, Sun Yat-sen University · Observational
Implantable collamer lens (ICL) is one of the most effective operation for high myopia. Due to refractive correction changed, and prism effect of the spectacle removed, in the early stage after ICL implantation, binocular function might be dysfunction, leading to asthenopia, blurred vision, double vision and so on. This study will recruit the high myopia subjects that scheduled for ICL implantation, purpose to investigate the binocular vision alternations and brain activation that impacted by ICL implantation.
308 studies on the registry are indexed under Vision Disorders; 81 are open to participants now.
This study's planned enrollment of 50 is below the median of 125 across 84 observational studies indexed under Vision Disorders.
Browse Vision Disorders studies →Zhongshan Ophthalmic Center, Sun Yat-sen University is the lead sponsor of 159 studies on the registry; 77 are open to participants now.
Counted across the registry records on this site, refreshed daily.
The high myopia subjects that scheduled for ICL implantation from Zhongshan Ophthalmic Center, Sun Yat-sen University
Exclusion Criteria:
Changes of phoria at different time points
Phoria was measured by phoropter.
Time frame: The examination was performed before operation and 1 week, 1 month, 3 monthes, 6 monthes after ICL implantation.
Changes of AC/A at different time points
Gradient AC/A was measured by phoropter.
Time frame: The examination was performed before operation and 1 week, 1 month, 3 monthes, 6 monthes after ICL implantation.
Changes of fusion vergence at different time points
Fusion vergence was measured by phoropter.
Time frame: The examination was performed before operation and 1 week, 1 month, 3 monthes, 6 monthes after ICL implantation.
Changes of accommodative response at different time points
Accommodative response was measured using monocular estimated method.
Time frame: The examination was performed before operation and 1 week, 1 month, 3 monthes, 6 monthes after ICL implantation.
Changes of relative accommodation at different time points
Relative accommodation was measured by phoropter.
Time frame: The examination was performed before operation and 1 week, 1 month, 3 monthes, 6 monthes after ICL implantation.
Changes of near point of convergence at different time points
Near point of convergence was measured using push-up method.
Time frame: The examination was performed before operation and 1 week, 1 month, 3 monthes, 6 monthes after ICL implantation.
Changes of accommodation amplitude at different time points
Accommodative amplitude was measured using push-up method.
Time frame: The examination was performed before operation and 1 week, 1 month, 3 monthes, 6 monthes after ICL implantation.
Changes of vergence facility at different time points
Vergence facility was measured by +2.00D/-2.00D flipper.
Time frame: The examination was performed before operation and 1 week, 1 month, 3 monthes, 6 monthes after ICL implantation.
Changes of accommodative facility at different time points
Accommodative facility was measured by 3△BI/12△BO flipper.
Time frame: The examination was performed before operation and 1 week, 1 month, 3 monthes, 6 monthes after ICL implantation.
Changes of brain activation at different time points
Functional magnetic resonance imaging activation of the brain
Time frame: The examination was performed before operation and 1 month, 6 monthes after ICL implantation.
Plan to share: No
This study is status unknown, as verified in Mar 2022. You cannot join it, but the record below documents what was studied.
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Zhongshan Ophthalmic Center, Sun Yat-sen University