Micro-Sandwich Color Encapsulation: The Non-Negotiable Safety Standard
The primary concern for optical distributors and D2C brand owners is user safety and compliance. Inferior OEM manufacturers use surface printing, where organic or inorganic color pigments sit directly on the outer curve of the lens polymer. Over time, friction against the eyelid and tear film chemistry can lead to pigment leaching, corneal staining, and severe inflammatory responses.
At Stephies Lens CO.,LTD, our advanced OEM Colored Contact Lens Manufacturing process relies exclusively on triple-layer Micro-Sandwich Technology. Organic, non-cytotoxic color matrices are double-encapsulated between two ultra-thin layers of hydrogel or silicone hydrogel polymer (HEMA/NVP or Lotrafilcon-based formulations). This guarantees that pigments never touch corneal or conjunctival tissue, preserving optical clarity while eliminating mechanical irritation.
High Oxygen Transmissibility ($Dk/t$)
Optimized polymer matrices ensure continuous corneal respiration, drastically reducing end-of-day hypoxia and dryness.
Precision Beveled Edge Design
CNC lathe-polished edge profiles ensure natural tear exchange under the lens with every blink cycle.