Can you tell me if there is any inaccuracy in the optometry of the eye hospital?

Hello, the computerized optometry plus comprehensive optometry is basically accurate, and each time we measure the number of degrees will have a certain fluctuation, so the optometrist will give a certain degree of deviation, and finally will go through the trial, as long as the wearer is comfortable, clear, there is no problem, and if there is a feeling of discomfort should be timely with the optometrist to feedback.