Corneal vascular opacities cannot be treated with myopic surgery. Corneal vascular opacities are caused by corneal trauma, surgery, inflammation and other traumatic scarring in the corneal stroma. When the cornea is deprived of oxygen, conjunctival blood vessels will grow into the cornea and form corneal vascular opacities. Since the corneal stroma is non-renewable, corneal vascular opacities cannot fade away. When corneal vascular opacities cover the cornea, they cause changes in the refractive error of the cornea and also cause irregular astigmatism, which affects the outcome of myopic surgery. Corneal vascular opacities in the active stage have various inflammatory mediators involved, which affects the prognosis of myopic surgery. Myopic laser surgery needs to be performed on a normal non-vascularized corneal surface, which usually does not cause bleeding. When neovascularization grows into the corneal rim, bleeding may be caused by severing the neovascularization during corneal flap creation, resulting in surgical failure. Before undergoing myopic surgery, you should follow your doctor’s instructions for preoperative examination and evaluation, and only undergo surgery if you are eligible.