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Lens technology, explained

Understanding your lenses helps you wear them with confidence. Here are expert answers to the most common questions about our technology, hydration and care.

Materials & design

What makes Clearlii lenses different from standard contact lenses?

Clearlii lenses combine premium materials with innovations such as hyaluronic-acid reservoirs, vitamin enrichment, UV filters and Silk Edge comfort design. Together, these features support oxygen flow, hydration and all-day comfort.

What is silicone hydrogel, and why is it important?

Silicone hydrogel is a material that allows up to five times more oxygen to pass through to your cornea compared to traditional hydrogel. More oxygen means healthier, brighter eyes with reduced redness.

Why does edge design matter?

The edge of a lens interacts with your eyelid at every blink. Clearlii's Soft-Comfort Edge ensures a smooth profile, minimising friction and supporting natural tear flow - key for comfort, especially in long-hour wear.

Hydration & comfort

How does hyaluronic acid improve comfort?

Hyaluronic acid (HA) is a powerful moisturiser that binds water molecules, keeping the lens surface hydrated. Clearlii lenses release HA gradually through the day, reducing dryness and maintaining comfort in screen-heavy or dry environments.

What role does vitamin enrichment play?

Clearlii Vitamin lenses contain micro-encapsulated vitamin E, an antioxidant that combats oxidative stress from UV light, pollution and digital devices. This helps reduce the sensation of fatigue and irritation.

Do Clearlii lenses protect against UV rays?

Yes. All of them blocks harmful UVA & UVB. A UV-absorbing component is integrated into the lens material. As UV rays hit the lens, the absorber filters them out, so cleaner light reaches your eye.

Oxygen & health

Why does oxygen matter for my eyes?

The cornea has no blood vessels, so it relies on oxygen from the air. Low oxygen (hypoxia) can cause redness, swelling and long-term complications. Silicone hydrogel ensures optimal oxygen supply, even in thicker lenses for higher prescriptions.

Can I sleep in Clearlii lenses?

No. Even with silicone hydrogel, sleeping in lenses reduces oxygen availability and increases infection risk. Always follow your optician's recommendations.

Replacement schedules

How do I know which type is best for me?

Your optician will assess your prescription, eye health and lifestyle. Some eyes need daily freshness, while others benefit from the durability of monthlies.

What is the difference between daily and monthly lenses?

Daily disposables (e.g. Clearlii Daily, Clearlii Vitamin) give you a fresh, sterile lens every morning, ideal for new or occasional wearers. Monthly lenses (e.g. Clearlii Monthly, Clearlii Monthly Advanced) are reusable for up to 30 days with proper care, and are more cost-effective for regular wearers.

Maintenance & care

Do daily disposables require cleaning?

No. Simply discard them after use.

Can I rinse lenses with tap water?

Never. Tap water may contain microbes that can lead to serious eye infections. Always use sterile lens solution.

How do I clean and store monthly lenses?

Wash and dry your hands. Place the lens in your palm with a few drops of Clearlii Multi-Purpose Solution. Rub gently for 20 seconds in circular motions. Rinse and store in a clean case filled with fresh solution. Replace the case every 1 to 3 months.

Troubleshooting

What if my lenses feel uncomfortable?

Check that the lens is not inside-out, damaged or past its replacement date. If discomfort persists, remove the lens and consult your optician.

Why do my eyes feel dry with lenses?

Causes may include reduced blinking (common with screen use), dry environments or overworn lenses. Clearlii's HA and vitamin-enriched designs help reduce dryness, but regular breaks and hydration are also key.

Can a lens get lost behind my eye?

No. The anatomy of the eye prevents this. A lens can sometimes move under the eyelid but is easily removed with proper technique.

Professional fitting & safety

Do I really need a professional fitting?

Yes. Proper fitting ensures lenses match your eye's curvature, diameter and tear profile. Poorly fitted lenses may cause discomfort or even damage.

How often should I see my optician?

At least once a year, or more frequently if you experience issues. Regular check-ups keep your prescription up to date and ensure long-term eye health.

The Clearlii Comfort Guarantee

Still have a question?

We stand behind our lenses. If you're not fully satisfied, you can return lenses through your optician—or get in touch and our team will help within 24 hours.

Contact support

References

  1. Papas, E. S. (2014). The significance of oxygen during contact lens wear.
  2. Data on file. Clinical study of silicone-hydrogel soft contact lenses.
  3. Data on file. Effect of drug delivery from two vitamin-loaded contact lenses with two concentrations on visual fatigue.
  4. Literature: Wöhlk Wesen, et al. Edge profiles of hydrogel contact lenses and their effect on fitting and wearing characteristics.
  5. Senna Akkaya Turhan, Ebru Toker (2015). Dove Press Journal. Optical coherence tomography to evaluate the interaction of different edge designs of four silicone-hydrogel lenses with the ocular surface.
  6. We recommend the use of a pair of CE-marked sunglasses with 100% UV protection in combination with your lenses, for full UV protection of the eye.
  7. Applications of Hyaluronic Acid in Ophthalmology and Contact Lenses. Won-Hsin Chang et al. Molecules 2021, 26, 2485.