The discount prescription glasses case has a refreshing breeze, sometimes you can put it directly in the eyeglass case without wearing glasses, just bring the eyeglass case, it's convenient and beautiful.

The quality of the eyeglass cloth is also good. It feels good when touched, and the layman can feel it clearly by wiping the eyeglass cloth. Internet discount eyeglasses online knowledge: What is pupil height? The vertical distance from the pupil to the bottom of the lens is the pupil height. So, the pupil height of different frames is also different.

The height of the eyes is slightly different from left to right, which is why the pupil height is also different. Some customers are like this. So when it comes to the single lens (which is our regular myopia glasses) or multi-focus (anti-fatigue, progressive, etc.), attention should be paid to both.

In theory, when we wear discount prescription glasses and process them, we should align the optical center of the lens with the position of the pupil. Many customers are also seeing this statement and, with a limited understanding, emphasize it with eyewear sellers.

I usually say to wear monocular glasses, but pupil height is not very important. Experienced individuals can adjust the height of their pupils on their own. Also, it is best to refer to the actual installation of old glasses for special lenses such as progressive and fatigue-resistant lenses.

The optical center of that lens is aimed at the pupil of the eye. However, in actual glasses, our optical center is often lower than the position of the pupil. The reason is very simple, is that our eyes are a dynamic usage environment, while glasses are fixed, even multi-focus is fixed. Moreover, the visual axis and optical axis do not coincide (their intersection is the viewing angle).