Oxygen and your eyes

Designed for healthy oxygen absorption

Like all leading brands daysoft lenses are designed to ensure healthy oxygen flow to your eyes.

The eye absorbs all of the oxygen that it needs directly from the atmosphere.  For this to continue when wearing contact lenses, the lens design and material must allow oxygen to flow through the contact lens to the eye.

Oxygen flow is measured in Dk units. With a Dk of 26, daysoft ® contact lenses provide all the oxygen required for normal daily disposable wear, the healthiest way to wear contact lenses.

In fact, research shows that a Dk of 20 1,2 is sufficient for healthy eyes and like all leading brands of daily disposable lenses, daysoft ® contact lenses exceed this requirement.

Dk units by brand

The table below outlines the Dk (oxygen flow) units for daysoft and other brands.

DK for healthy eyes should be above 20
daysoft SILK daily disposable 26
daysoft CLASSIC daily disposable 26
J&J Day Acuvue Moist 28
Alcon Dailies All Day Comfort 26
Bausch & Lomb Soflens Daily Disposable 22
Coopervision Proclear 1 Day 25
Coopervision BioMedics 1 Day 24
Coopervision UltraFlex 1 Day 24

Are Higher Dk Values Better?

Expensive silicone hydrogel lenses are often sold on the basis that they have higher Dk values (are more oxygen permeable) BUT the amount of oxygen which is consumed by the part of the eye which needs it (the endothelium) is exactly the same as with hydrogel lenses, like daysoft ®.  In fact, these expensive Silicone hydrogels might not only hurt you in the pocket, there is growing evidence that this stiffer material (higher modulus) is less kind to your eyes and that over time, eye complaints can develop as a direct result3.

Why pay four times the price?  With daysoft® you get all the oxygen you need from a proven, comfortable contact lens material. daysoft ® lenses with a Dk of 26 hit the bulls-eye.

We hope that you found the above helpful and if you have any questions, please do not hesitate to Contact Us.

Oxygen and your eyes video

Money back promise

Both of our brands are available at the same unbeatable price and every purchase is backed by our no quibble money-back promise. This means you can try daysoft® lenses and if you aren't happy with your purchase you'll receive a refund.

daysoft® lenses

daysoft in SILK solution

SILK solution is an enriched saline solution for enhanced comfort and moisture throughout the day

SILK contains the eye’s natural lubricant, Hyaluronan, which can hold up to 1,000 times its weight of water, keeping your eyes moist all day

daysoft in CLASSIC solution

CLASSIC solution is a simple saline solution, with no added moisturisers

CLASSIC solution can be particularly beneficial to allergy sufferers and people with sensitive eyes



1) Brennan N. A model of oxygen flux through contact lenses. Cornea, 2001;20:104-8
2) Brennan NA. Beyond flux:total corneal oxygen consumption as an index of corneal oxygenation during contact lens wear. Optom Vis Sci, 2005;82:467-72
3)  Mechanical Complications Induced by Silicone Hydrogel Contact Lenses. Meng C. Lin, O.D., Ph.D, Thao N. Yeh, O.D. Eye Contact Lens. 2013;39(1):115-124