Hello, I am studying ophthalmology. First of all, we should correct a misunderstanding. There is no direct one-to-one correspondence between vision and myopia. The visual acuity is above 1.0 (international standard), that is, above 5.0 (Chinese standard) is considered emmetropia; if the visual acuity is less than 5.0, it may be myopia or hyperopia, and some may have organic diseases. It’s just that myopia is the most common cause, so judging whether myopia is based on the results of optometry: if the visual acuity is corrected to more than 5.0 with a convex lens, we call it hyperopia; if the visual acuity is corrected to more than 5.0 with a concave lens, we call it myopia. If it cannot be corrected to above 5.0 with glasses, it is suspected that there is an organic disease. Just now you said that your left eye is 4.9 and your right eye is 4.5. If you are not an elderly person (cataracts are more likely), myopia is most likely, but it cannot be said that it is definitely myopia. It is best to get an eye exam. Whether you wear glasses or not depends on your visual needs. If you don't need to see clearly, it's okay not to wear them. I hope you understand. I have tried to speak in simple terms.