Nowadays, the number of people with myopia is increasing. Many teenagers have already put on their glasses. At the university, almost two-thirds of the students wear glasses. More and more people wear glasses, but if the frame glasses are not properly treated, the glasses will be deformed. The deformation of the frame will cause a burden on the nose or ears, and the lenses will be easy to loose. The following professionals will summarize the suggestions on glasses care. Let's take a look!

Clean with water by yourself The glasses lean on the nose, and the substances secreted by nose are greasy and acid, so you couldn’t wash them with clean water only.

Pupillary distance is measured in millimeters from the center of one pupil to the center of another pupil. This measurement helps to ensure that your prescription is properly centered in the spectacle lens for the clearest and most accurate vision. PD represents the pupillary distance, which is measured from the right pupil to the left pupil. The PD of the adult is between 54-74. The children are between 43-54.

What is a single PD or dual PD? Dual PD is the measurement from the center of each pupil to the center of the bridge of your nose