Its mechanism called interocular blur suppression. The binocular visual acuity is usually slightly reduced, but the brain will gradually adapt this condition , and improve binocular vision finally.

• 其机制是双眼间的模糊抑制，虽然双焦点的视力通常会较正常视力稍下降，但人的大脑会逐渐适应这一双焦视力状态，而使双眼视力逐渐提高。