Should the middle optical zone of Xinlexue lenses be in the middle of the pupil?

It must be consistent. Nowadays, many optical shops only measure the interpupillary distance of both eyes. It must be tested with one eye, because the interpupillary distance of one eye is not necessarily the same for each pair of glasses. If the interpupillary distance is measured according to the bisected interpupillary distance, most people will not feel it, but they are sensitive. People will have trouble seeing clearly and their eyes cannot integrate into the lens vision.

Tests including sub-vertex height also require glasses, because the position of wearing glasses is different for everyone. These will be tested, and the data must be suitable before you can hand over a pair of qualified glasses.

Pupillary distance refers to the distance between the centers of both pupils when the eyes are looking straight.

The normal interpupillary distance for men is about 60.9 mm, and the normal interpupillary distance for women is about 58.3 mm.

Under normal circumstances, interpupillary distance has little impact on wearing glasses, and glasses can be worn with various interpupillary distances.

But when wearing glasses, you must pay attention to the distance between the optical centers of the two spectacle lenses, which must match the interpupillary distance. That is, the optical center of the spectacle lens should be aligned with the center of the pupil.