How often do children’s glasses need to be replaced?

The replacement frequency of children’s glasses is influenced by multiple factors. Generally, it is recommended to replace them every half a year to a year. The following is a specific analysis:
Changes in vision
Children are in the stage of growth and development, and their vision changes more frequently. If a child’s myopia or hyperopia degree increases rapidly, for instance, by more than 50 degrees within half a year, it is usually necessary to change glasses to ensure the effectiveness of vision correction and avoid eye fatigue caused by mismatched degrees, which could further aggravate the degree of myopia or hyperopia.
For children with astigmatism, if the degree or axis of astigmatism changes significantly and affects the child’s visual quality, such as presenting symptoms like blurred vision and double vision, glasses should also be replaced in a timely manner.

The degree of wear and tear of glasses
Children are lively and active, and their glasses are prone to bumps, scratches, etc., which can cause scratches, wear and tear on the lenses, and deformation of the frames. If the lens is severely scratched, it will affect the light transmittance and visual clarity. Even if the degree remains unchanged, the lens needs to be replaced. If the frame is deformed, it may affect the comfort and stability of wearing, and even press on the child’s facial skin or affect the effect of vision correction. In such cases, it is necessary to adjust or replace the frame in a timely manner.
Growth and development factors
As children grow older, their facial bones and facial features are also constantly developing. Generally speaking, a child’s face undergoes obvious changes every 1 to 2 years, which may cause the originally suitable glasses to become unsuitable. If the frame is too small, it will put pressure on the child’s face, affecting blood circulation and facial development. At this time, larger-sized glasses need to be replaced.
In addition, parents should take their children to professional institutions for regular vision checks to promptly identify vision problems and issues with the fit of glasses, and determine whether children’s glasses need to be replaced based on the actual situation.