Manufacturing Contact Lenses (Medical & Cosmetic)

Manufacturing Contact Lenses (Medical & Cosmetic)

1. Raw Materials:

   Lenses are made from hydrogel or silicone hydrogel polymers, allowing oxygen permeability and offering flexibility.

2. Forming Methods:
   • Spin Casting: Liquid plastic is poured into molds and spun at high speed, forming the lens curvature as required.
   • Lathe Cutting: Solid polymer discs are precisely cut using CNC machines according to the optical prescription.
3. Cosmetic Additions (for Colored Lenses):
   • Patterns and colors are printed to mimic the iris.
   • The color layer is coated with a protective layer to prevent direct contact with the eye.
4. Sterilization & Packaging:
   • Lenses are sterilized using heat or special solutions.
   • Each lens is packaged in a container with saline solution for preservation.

Manufacturing Prescription Glass Lenses

1. Measurement:

   Accurate measurement of farsightedness, nearsightedness, and astigmatism.

2. Material Selection:

   Organic plastic, polycarbonate, or glass.

3. Shaping & Grinding:

   Lenses are shaped and ground precisely according to the optical prescription.

4. Polishing & Coating:
   • Polishing the surface to remove roughness.
   • Applying coatings: scratch-resistant, anti-reflective, and UV protection.
5. Cutting & Assembly:

   Lenses are cut to fit the eyeglass frame precisely.

Common Steps for All Lenses

• Quality Inspection: Specialized equipment is used to ensure visual quality, accurate measurements, and eye comfort.