What is the oxygen transmissibility of Acuvue Oasys 1-Day and why does it matter?

What Is the Oxygen Transmissibility of Acuvue Oasys 1-Day and Why Does It Matter?

Acuvue Oasys 1-Day lenses have a Dk/t of 121 — one of the highest oxygen transmissibility ratings among daily disposable lenses. Understanding what this means helps explain a key reason these lenses are so widely recommended for all-day wear.

What Is Dk/t?

Dk/t is the standard measurement of oxygen transmissibility in contact lenses: D = diffusion coefficient, k = solubility coefficient, t = lens thickness. A higher Dk/t means more oxygen passes through the lens to the cornea per unit of time. The cornea relies on dissolved oxygen from the tear film and atmosphere to function healthily — it has no blood vessels of its own.

Why Oxygen Transmissibility Matters

When a contact lens creates a barrier between the cornea and atmosphere, insufficient oxygen leads to corneal hypoxia — causing redness, corneal swelling (oedema), and in chronic cases, new blood vessel growth into the cornea. High Dk/t lenses like Acuvue Oasys 1-Day significantly reduce this risk.

How Acuvue Oasys 1-Day Compares

Senofilcon A's silicone hydrogel structure allows oxygen to pass through the silicone matrix directly — independent of water content — transmitting nearly five times more oxygen than a typical standard hydrogel daily disposable. For wearers wearing lenses for long daily periods, this supports healthier, more comfortable eyes throughout the full wear day.