First, examine the appearance of the eyewear:
Electroplating, lacquer coatings, polished acetate surfaces, and other finishes should be uniform in color, free from obvious defects, spots, or scratches.
Printed, laser-etched, or engraved markings on lenses and temples should be clear, smooth, and legible, and should not easily rub off.
Lens color should be accurate and free from chromatic inconsistencies, scratches, or air bubbles; gradient lenses should feature a natural color transition, and the colors of the left and right lenses should be symmetrical.
Hold the glasses by the temples facing a fluorescent light and slowly move them so the reflection of the light travels across the lens surface; if the reflected image does not appear wavy or distorted, it indicates the lenses are free from internal stress.
Next, check the packaging and origin information:
Quality eyewear comes with complete packaging, hangtags, or instruction manuals. These should include product specifications, industry quality standards, and detailed contact information for the distributor or manufacturer.
Finally, try them on:
Quality eyewear provides clear, true-to-life vision and a comfortable fit, without exerting pressure on the bridge of the nose, temples, or ears. The craftsmanship should be refined, with a smooth, polished feel and fluid, natural lines.
