Materials

The right polymer for every lens.

Water content, breathability, design stability: the materials we build our lenses with define what you feel when you wear them.

Qualimed works with two main polymer families, plus a third under evaluation, selected according to the lens replacement schedule, the pigmentation and the wearer's profile.

Hioxifilcon D

Monthly

Higher water content and greater breathability: the softest polymer in our range, ideal for those who wear lenses for many hours a day.

Water content: 54% water
Composition: HEMA + Glycerol methacrylate (GMMA)
Oxygen permeability: Dk 21
Ionicity: Non-ionic (FDA Group II)

Water balance

The water in the material is divided into «free water» (absorbed by imbibition) and «bound water» (strongly anchored to the polymer through hydrogen bonding). Hioxifilcon D has a high percentage of bound water thanks to glycerol, which significantly reduces the tendency to dehydrate even in non-ionic materials.

Clinical advantages

54% water content: higher than Polymacon (38%) for better prolonged comfort
Dimensional stability: base curve unchanged throughout the month
Deposit resistance: a neutral surface charge reduces protein deposits
Stability at tear pH: no geometric variation from pH changes
Constant Dk regardless of the degree of hydration (clinical studies)
Zero adaptation time on the corneal surface
Built-in UV protection
Superior colour rendering: allows more natural iris shading than Silicone Hydrogel

Why not Silicone Hydrogel for coloured lenses?

Silicone Hydrogel has a very high Dk (60–140), but the colour rendering does not meet the wearer's aesthetic expectations. Hioxifilcon D allows detailed iris shading with a natural aesthetic result, while maintaining a Dk suitable for monthly wear.

When to recommend Hioxifilcon D

For wearers with a tendency to drop out, a reduced tear film, dry eye syndrome or wear in air-conditioned environments, monthly Desìo lenses in Hioxifilcon D offer superior performance in terms of comfort and reduced dehydration.

Polymacon

Quarterly

Mechanical strength and design stability: Polymacon is the choice for quarterly replacement lenses, where pigment fidelity over time is essential.

Water content: 38% water
Composition: HEMA copolymer
Oxygen permeability: Dk 12
Ionicity: Non-ionic (FDA Group I)

Why Polymacon for contact lenses?

High dimensional stability

The low water content (38%) ensures that the lens consistently retains its original geometric dimensions, regardless of wearing and environmental conditions. This is essential for toric geometry and for the correct positioning of the Prism Ballast.

Consistent colour rendering

Polymacon guarantees perfect and consistent reproducibility of the colours during the production phase, ensuring uniformity between batches.

Stable comfort in hot climates

Polymacon's low water content (38%) reduces dehydration of the lens in contact with the air and limits its tendency to draw moisture from the tear film. The result is prolonged comfort even in hot-climate countries, where high-water-content lenses tend instead to dry out more quickly on the eye.

Clinical validation

Daily and quarterly Polymacon lenses have passed the clinical checks certifying that they can be fitted in complete safety. The IRSOO study found no significant changes in the homeostasis of the anterior segment, tear film or corneal surface.