Binocular Vision Alternations and fMRI Activation After ICL Implantation for High Myopia

Binocular Vision Alternations and Functional Magnetic Resonance Imaging Activation After Implantable Collamer Lens Implantation for High Myopia

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.

Inclusion Criteria:

• Age 18-35
• Spherical equivalent over -6.00DS, astigmatism within -2.00DC, anisometropia within -2.00DS
• BCVA ≥ 0.8
• Plan to accept implantable collamer lens surgery
• Near point of convergence within 10cm
• Positive fusion vergence over 20pd

Exclusion Criteria:

• Stabismus
• Previous ocular surgery or trauma
• History of vision therapy
• Monovision and nystagmus
• Mental disease or craniocerebral trauma