The difference between corrected vision and naked eye vision mainly lies in the presence or absence of correction of refractive errors such as myopia through the wearing of framed glasses, etc. Generally, the vision examined by a patient wearing eyeglasses is corrected vision. Visual acuity refers to the ability of the retina to distinguish images. Naked eye vision refers to the visual acuity of the examined person without wearing glasses and examined by an eyeglass chart, while corrected vision refers to the visual acuity of the examined person after correcting refractive errors such as nearsightedness by wearing framed eyeglasses or contact lenses. The corrected visual acuity of the examined person is usually better, especially for patients with refractive errors. It is recommended that patients with abnormal vision seek medical attention to evaluate their condition and follow medical advice.