First, the degree does not match
The eyes of minors are still developing, and the degree of myopia is constantly changing. If the lens cannot be replaced in time, it will not only cause visual fatigue, but also may experience symptoms such as blurred vision, dizziness, and eye pain.
The refractive status of adults is not absolutely stable, and overuse of the eyes may also cause myopia to deepen. It is recommended to go to the hospital for optometry and eye health examinations on a regular basis, to replace the lenses in time, and to avoid other complications.
Second, the lens aging
Wearing glasses for a long time will inevitably cause some scratches and damage. If the lenses are not replaced for many years, visual clarity will be reduced.
Third, the lens is loose
The angle of the lens must be consistent with the line of sight, otherwise the target will not be clearly seen, and wearing glasses is of little significance. Taking off and wearing the glasses will cause subtle changes in the original angle, and the error will become larger and larger, so it is very important to adjust regularly.
How often should it be replaced?
Knowing that the above factors will affect the effect of myopia prevention and control, how long should the replacement cycle of glasses be?
People at different ages are suitable for different lens changing frequencies:
1. Adolescence
Adolescents are at the peak of eye use. After studying at a desk for a long time, after using the eyes at close range, the ciliary muscle spasm will appear, and the degree of myopia is easy to deepen.
It is generally recommended to do a refraction about half a year to observe whether the degree has changed. If the myopia deepens, the lens should be replaced.
2. Adults
The state of the eyes is stable, and the change in the degree of myopia is small. Glasses are natural wear and tear, and it is generally appropriate to change them every one and a half to two years.
3. Old age
Eyes degenerate, myopia and presbyopia may occur, and it may be difficult to see near with ordinary myopia glasses. Observing the elderly at home, if the elderly have difficulty seeing, the eyes are sore and uncomfortable, they should go to a regular glasses fitting institution for optometry and replace the lenses in time.
Regular optometry review can not only help myopic patients to replace their own glasses, but also choose a more suitable myopia prevention and control method according to the visual inspection situation, but also can control the condition of the eye and avoid complications.
