Corrective lenses mostly refer to corrective lenses for refractive errors. Whether or not the patient’s vision can be restored is related to the cause of the patient’s illness. The vision of patients with refractive errors can be improved, but the vision of patients with cataracts, glaucoma and other ocular diseases cannot be restored. Refractive error patients such as myopia, hyperopia, etc. can appear vision loss, the patient can be equipped with refractive error correction lenses, in order to correct refractive error, so as to improve the patient’s vision. Timely correction of refractive error can also alleviate the patient’s visual fatigue and prevent further increase in myopia. In addition to refractive error, patients with cataract, glaucoma, and retinal detachment may also experience vision loss, and patients with these diseases cannot improve their vision by wearing vision correction glasses. It is recommended that patients with vision loss should seek medical attention to evaluate their condition and follow the doctor’s instructions for treatment.