Cannot be repaired: When the damage is severe and there are no spare parts or accessories available, welding or electroplating cannot be performed, and thus the item cannot be repaired.
Partial repair: It can be used after welding, but the surface coating will inevitably peel off and change color. After deformation correction, sometimes the traces cannot be completely eliminated and repair marks (such as indentations, abrasions, etc.) will still remain.
Complete repair: Such as replacing screws, polishing, nose pads, lenses, frames, etc. Problems such as loose screws, slight deformation of the rimless sunglasses, and adjustments can all be completely repaired.
After repair, it may not be fixed properly and could even cause further damage to the glasses. No matter how skilled the repair personnel are, they cannot prevent the possibility of the glasses being damaged. Sometimes, the men's sunglasses may seem to be only slightly damaged on the surface, but the hidden problems are very serious. It is only when they are repaired that the serious situation becomes apparent: they break immediately after repair. To reduce the risks, it is best to prevent the cycling sunglasses from being damaged and deformed repeatedly, and to avoid exposing them to impacts and squeezes. Do not repair the best spectacle frames yourself or ask non-professional personnel to do it.
Before seeking professional repair services, you might hear the repair personnel asking for your opinion: The damage and deformation are severe. Try to repair it as much as possible. There is a risk of further damage and it cannot be compensated. The responsibility for the consequences lies with you. If you disagree, you can choose not to have it repaired. This prior agreement helps avoid disputes later on and complies with the regulations of the industry association, being reasonable and legal.
2. Material of the lenses:
(1) Crystal lens:
A crystal sheet is a natural quartz crystal, with the main component being silicon dioxide. Its refractive index is approximately n = 1.54. Colorless and transparent crystals are called crystals, while those with color are called tea crystals. Among the tea crystals, those with different shades of color are classified as dark ink crystals, medium-colored tea crystals, and light tea crystals.
Antes de la llegada del vidrio, se utilizaba principalmente cristal para fabricar vasos. Sin embargo, la cantidad de vasos fabricados con materiales naturales era muy escasa. Hoy en día, se produce una gran cantidad de vidrios mediante métodos artificiales para crear cristales artificiales. La pureza de los cristales producidos por métodos artificiales es alta, presenta menos defectos, un excelente rendimiento óptico y una alta eficiencia de producción. Esto ha llevado a una reducción significativa en el precio de los vasos de cristal. Los cristales fabricados artificialmente son generalmente incoloros y transparentes. Tras ser tratados con láser y rayos X, pueden adquirir diversos colores, incluido el marrón. También existen tratamientos como el de doble cara.
Los cristales son pesados, de alta dureza, difíciles de procesar y su absorción de rayos infrarrojos y ultravioleta no es tan buena como la de las gafas de sol Clubmaster. Además, los cristales naturales suelen presentar doble refracción, un material irregular y son caros. Por lo tanto, como lentes para gafas, los cristales han sido reemplazados gradualmente por láminas de vidrio y plástico.
