Hello, Do let us know about your previous glass prescriptions, if there has been frequent change in the number. If you are comfortable with your glasses, minor under correction is okay. Do get examined by ophthalmologist nearby to rule out any thinning disorder of cornea like keratoconus/ PMD/ TMD, get a dilated retinal examination and a baseline topography for keratoconus screening.

Hello A. Yes...if you are comfortable with vision then you may wear uncorrected power glasses B. You are free to take second opinion

For such higher numbers,usually a  little undercorrection is given. If you are comfortable then need not to worry,Continue with  the lower number. But if your number is increasing then you must get the corneal topography done .