China
Relevant standards: mainly based on GB 10810.3-2006 “Glasses lenses and related glasses products Part 3: Transmission specifications and measurement methods” and GB/T 14214-2003 &...
Effect of refractive index on visual acuity in the aged
Lens thickness
For the elderly with high myopia or farsightedness, it is more appropriate to choose a lens with a high refractive index. The ...
Frame width
Too wide: If the frame width is too large, the glasses are easy to slide on the face, especially in some light exercise or facial sweat, this situation will be more obvious. At the same...
How to wear the right glasses correctly
Correct vision and protect the eyes: for people with refractive errors (such as myopia, farsightedness, astigmatism), long-term wear of the appropriate degre...
eyeglass
Optical property
Clarity: Quality sunglasses lenses at any Angle to see the object should be clear, no deformation, no double shadow. You can rotate the lens slightly by observing distant ...
Cleaning and maintenance of titanium sunglasses frames need to pay attention to the following points:
Daily cleaning
Rinse with water: Rinse the frame with running water, which can wash away the su...
