Cranial defects are very harmful to patients, not only in terms of external appearance, but also in terms of nerve damage, which can lead to complications. There are many patients who have blurred vision after craniosynostosis. So, how to do about blurred vision due to skull defect? Here is a brief introduction of it, hope it will be helpful to the patients. The common danger of cranial defect is that it destroys the integrity of the skull, which makes the cranial cavity closed and the stability of the intracranial environment is greatly affected. This can lead to cerebrospinal fluid circulation and blood circulation disorders, affecting normal neurological functions, which can lead to weakness of limbs, poor fine activities and reduced vision. So, what can be done about blurred vision due to cranial defects? A more effective method is to perform cranial repair, which can help restore vision to some extent. This procedure is one of the common procedures in neurosurgery. For the surgery, it is more important to use repair materials with excellent performance, and another is to have an experienced surgeon to operate the surgery. Currently, in contrast to other materials, a new specialty polymer material, polyetheretherketone PEEK, has excellent performance. Its stiffness, rigidity, strength, elasticity, and histocompatibility are all comparable to that of autologous cranial bone, and the patient recovers significantly after surgery. This advanced polyetheretherketone PEEK material is currently used in our cranial repair surgeries, and it has largely changed the deficiencies of traditional materials, not only for good surgical results, but also because we have successfully incorporated the concept of plastic surgery, which allows patients to recover more naturally and aesthetically after surgery, and can also help restore and improve blurred vision caused by cranial defects.