Is glasses online matching reliable? The newly purchased glasses online are very uncomfortable to wear, and when I feel dizzy, there is also a situation where the fusion image cannot be integrated. Through testing, it was found that the left and right lenses of this pair of glasses were actually reversed! Understand the precautions for glasses online matching.

An optometry sheet is not equivalent to an optometry prescription. Many people understand optometry as "measuring the degree of myopia in the eye." With this result, they can perform optometry. In fact, an optometry prescription is only a "measurement" of the refractive state of the subject's eyes, and it is not necessarily your best prescription for glasses. Optometry and optometry are a complete task, and if they are performed separately, problems can easily arise.

Professional opticians need to give overall consideration. A good looking frame must be actually worn before it can be determined whether it is suitable and whether the parameters match.

Problems caused by parameter mismatches, which have not been tried on and actual wear data for large frame lenses have not been measured, can lead to pupil distance errors. Wearing glasses with inaccurate pupil distance for a long time can produce prism effects, cause eye fatigue, and accelerate the growth rate of myopia.

Pupil distance refers to the distance between the pupils. Distant pupil distance refers to the distance between the pupil centers of the two eyes when the subject looks at a distant target and looks at it at a distance (that is, the distance between the pupil centers of the two eyes when they are looking at an infinite distance head-on). Proximity pupillary distance (NCD) is the distance between pupil centers during close work.