The center of the pupil should be aligned with the optical center of the lens, and functional lenses are especially important!
The nose pads should fit snugly on the bridge of the nose.
The distance between the lens and the anterior apex of the cornea of the eye should be about 12 mm.
The bend of the temple should be the same as the bend of the ear, otherwise the frame will be loose and easy to slip.
The front angle of the frame should be around 8-15 degrees, so that it will be more comfortable to wear.
A !️ pair of comfortable glasses has little to do with the brand of lenses and frames, the key is whether it plays its function. Otherwise, 10,000 yuan glasses are also garbage ️.