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.
Study Type
OBSERVATIONAL
Enrollment
50
Zhongshan Ophthalmic Center, Sun Yat-sen University
Guangzhou, Guangdong, China
RECRUITINGChanges 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.
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
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.