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Intraocular Lenses
Nature: Poly (methyl methacrylate)
Contamac's PMMA offers outstanding stability and optical qualities for a predictable outcome and maximum performance. The material is supplied exclusively in a blank format to maximise efficiency and reduce production costs
Available in Clear for lens production and in Blue for capsular tension rings.
For further information on PMMA please email sales@contamac.com
PMMA technical information
Material Characteristics:
| Property | PMMA |
|---|
| Water Content | 0.22% at 20°C |
| Refractive Index @ 20°C | 1.49 |
| Light Transmission | >90% (400-440nm) |
| Density | 1.185g/cm3 |
| Hardness | 89 Shore D |
| UV blocker | Standard |
| Diameter | 12.70 & 16.0mm |
| Thickness | 3.00mm |
Please note: These are typical values. Always check the certificate of compliance supplied with the goods for the actual values of the batch.
Diamond Tooling:
| Tooling | Radius (mm) |
|---|
| Rough | 0.30 – 0.50mm |
| Fine | 0.30mm |
Machining Recommendations:
| Lathe type | RPM | Bulk cut | Fine Cut |
|---|
| Manual | 7,000 | 0.5 - 0.7mm | 0.05mm |
| CNC | 7,000 | 0.5 - 0.7mm | 0.05mm |
| Air Bearing | 10,000 | 0.5 - 0.7mm | 0.05mm |
Environment Control
For best manufacturing conditions Contamac recommends 19-23°C with a relative humidity of 45% - 60%
Polishing
Contamac's PMMA material can be polished using tumble polishing methods.