Starting from the perspective of the details of each pair of glasses, list out the details of glasses that can come to mind one by one, and strive towards the goal of matching discountglasses that are infinitely close to perfection.
The pupillary distance we measure in our daily lives is generally for distance use. When looking up, the human eye normally adjusts and converges, so the pupillary distance for close use is smaller. Glasses specifically designed for close use should have a closer pupillary distance.
The pupil distance we refer to is the total distance between the left and right pupils. Some people have different left and right pupil distances, and we should measure and process them according to different monocular pupil distances for more accuracy, especially for high myopia and functional lenses.
For glasses designed specifically for far-field viewing, the actual processed pupil height should be set above the actual far-field pupil height. For glasses that are specifically designed for close viewing, a higher pupil will result in a lower one. But for everyday discount eyeglasses online that require simultaneous viewing of far, medium, and close range, we need to take care of them, make choices, and weigh them all.
I generally believe that the optical center should be set at a distance below the pupil height. The specific consideration also needs to be the size of the distance between the eyeglass online lenses. Smaller eyepiece distances allow for less downward movement, while larger eyepiece distances make it easier to scan the bottom part of the ordered lens, resulting in better mid-range viewing. This allows for better viewing distance and close-up.
Otherwise, if you use the pupil height to look far, it will be troublesome to look close. This is a relatively scientific method of mutual selection and weighing the pros and cons.
