Degree: Professional optometrists will first use the computer optometry instrument to calculate the two eyes full eye degree and diopter, if you use this degree to get glasses, it is not right, because the glasses degree is just right for seeing far vision degree, but will cause eye fatigue, vision gradually worsening phenomenon, Lose the true meaning and effect of wearing glasses to correct and assist vision, so you have to measure your life degree again.
Quantity: Measure the most suitable degree of life Professional optometrists will be like a good friend who can intimate talk, understand your age, work nature, living habits in detail... And so on, the deployment of the most suitable for daily use of the "life degree", with such a degree of glasses, not only can see clearly, but also to maintain visual adjustment without excessive fatigue, but also to maintain visual health, to avoid further deterioration of vision and cause an increase in degrees.
After the professional optometrist has mastered the real degree and the degree of life, he will let you try on the test stand, on the one hand, to make more accurate fine tuning for vision, and adjust the balance of the parallax between the left and right eyes, on the other hand, let you adapt to the degree of glasses in the future.