GM Advance
GM Advance is an evolutionary advance on the physical and chemical properties of GMA-based soft lens materials. Its refined blend of purified monomers helps achieve high manufacturing yields, while its exceptional on-eye stability, water retention and durability guarantees patient satisfaction and low lens breakage levels.
- Lower modulus, higher tensile strength and higher elongation-to-break than other GMA based materials
- Unique material blends ensure superior lens surfaces and edges
- More dimensionally-stable than other GMA-based and soft lens materials
- Resists dehydration longer and rehydrates faster than comparable materials
- Dehydration comparable to Polymacon, and better than VP/PMMA-based materials
- Available in 49% and 58% water contents
GM Advance technical information
Material Characteristics
| Property | Contaflex GM Advance 49% | Contaflex GM Advance 58% |
|---|---|---|
| Classification | Filcon l 2 | Filcon ll 2 |
| USAN | Acofilcon B | Acofilcon A |
| Oxygen permeability (ISO) @ 35°C gas to gas (barrers) | 16 | 26 |
| Swell factor @ 20°C | 1.28 | 1.36 |
| Water content by refractometer @ 20°C | 50% | 60% |
| Refractive index @ 20°C dry | 1.515 | 1.515 |
| Refractive index @ 20°C hydrated | 1.417 | 1.400 |
| Light transmission (%) @ 380-780nm | >94% | >94% |
| Hardness (Shore D) | 86 | 83 |
Please note: These are typical values. Always check the certificate of conformity supplied with the goods for the actual values of the batch.
Environment Control
For best manufacturing conditions Contamac recommends 19-23°C with a relative humidity of 45% - 60%
Polishing
The recommended polishing compound is Contapol 2 with a spindle speed of 3,500 rpm and weight of 240gms. With the above machining recommendations polishing should require a maximum of 30 seconds.
Hydration
Hydration of GM3 Advance materials is best performed in buffered saline with a PH of 6.8 – 7.3.
Manufacturing Consumables
- High melt blocking wax
- High melt blocking beeswax
- Kemdent blocking wax
- Water soluble wax
- Contapol 1 polishing compound
- Contapol 2 polishing compound
- Cotton polishing cloth
- Delrin polishing cup
- Delrin polishing sponge
- Roller sponges
Accessories
- Tweezers
- Hydratation baskets
- Glass vials
- Stoppers
- Aluminium top seals
- Flip tear up seals
- Shrink-wrap sleeves
- Double soft lens mailers
- Net vial sleeves
- DMV soft lens remover
- Lens catch mat
Related Content
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Contaflex GM Advance | Brochure
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