Lens technology

LENS VENTILATION FOR SUNGLASSES AND SNOW GOGGLES

Ventilation on the lens is a solution designed to encourage air circulation and reduce internal moisture: two factors that, in many sports and weather conditions, directly affect visual comfort. When ventilation is effective, the feeling is of more stable and “dry” vision, even during pace changes or in conditions with limited airflow.

Function Increase ventilation and air circulation
Benefit Reduce internal moisture that causes fogging
When it is most useful Wide lenses and low-airflow situations
Ventilation system on lenses to reduce internal moisture
Ventilation holes on the lens to improve airflow and comfort

Overview of lens ventilation technology

Special DEMON lenses with a ventilation system created through ventilation holes in the lens, increasing comfort in all weather conditions and reducing the internal moisture that causes fogging.
It is important to note that the DEMON collection includes both eyewear with special ventilation holes and snow goggles. This technology is generally applied to models with very wide lenses that require greater ventilation to prevent fogging.

 

In practical terms, ventilation works on a critical point: when air becomes stagnant, moisture tends to build up and the likelihood of fogging increases. The holes (or equivalent solutions) help “move” the air where it is needed, improving moisture management and making the experience more comfortable during activity.

When the difference is most noticeable

On humid days, with temperature changes, during intense effort, or when the lens is particularly large and natural ventilation may be less effective.

Snow goggles with ventilation holes and foam protection

Snow goggles: ventilation where it matters

Snow Goggles for Skiing and Snowboarding:

As for snow goggles, the entire collection features Double Lenses with Anti-Fog Treatment, technologies designed to counteract and prevent condensation from forming on the inner surface of the lens. However, for models with wider lenses where these two technologies combined with frame ventilation are not 100% effective, holes are created in the lens surface to increase ventilation and air circulation.
To prevent snow or water from entering between the 2 lenses, a foam section protects the holes.

 

Here, ventilation on the lens becomes a real “reinforcement”: it comes into play in cases where the wide lens and real conditions (humidity, breathing, intensity, weather) may require extra airflow support. The foam protection is a functional detail: it helps maintain ventilation without compromising protection from external elements.

  • Targeted ventilation: improves air exchange in critical areas.
  • Support in real conditions: useful when humidity is high or the lens is very wide.
  • Protection: foam section to limit the entry of snow or water between the 2 lenses.

Sports glasses and prescription sports eyewear: holes and grooves

Sports Glasses and Prescription Sports Eyewear:

The same concept is repeated for sports glasses. In fact, where ventilation is not sufficient to prevent fogging (due to aerodynamic shape or a very large lens), holes or special grooves are added to the lens surface. This technology effectively counteracts fogging even in low-airflow conditions, providing a constant feeling of comfort for the eyes.

On sports glasses, the aerodynamic shape and the size of the lens can influence airflow. In these cases, holes and grooves play a practical role: they help “channel” airflow, reducing stagnation and making use more comfortable during climbs, sprints, descents, or long training sessions.

More climate comfort

Helps manage internal moisture in different weather conditions.

Support in low airflow

Useful when natural ventilation is limited by the shape or the large lens.

Cleaner feeling

Promotes more stable vision and a constant feeling of relaxation for the eyes.

Usage tips to maximize the ventilation effect

Ventilation works best when the air path remains open and clean. Proper maintenance and mindful use help maintain stable performance, especially on humid days or during long outings.

  • Check the holes: make sure they are not blocked by dirt, ice, or residue.
  • Correct drying: after use, store the product dry to reduce residual moisture.
  • Fit stability: a proper fit also helps with airflow management.
Detail of ventilation holes and air circulation on the lens

FAQ

What is lens ventilation for?

Special DEMON lenses with a ventilation system created through ventilation holes in the lens, increasing comfort in all weather conditions and reducing the internal moisture that causes fogging.

Which models is it usually applied to?

This technology is generally applied to models with very wide lenses that require greater ventilation to prevent fogging.

Why do snow goggles have holes on the lens?

For models with wider lenses where these two technologies combined with frame ventilation are not 100% effective, holes are created in the lens surface to increase ventilation and air circulation.

How is snow or water prevented from entering between the 2 lenses?

To prevent snow or water from entering between the 2 lenses, a foam section protects the holes.

Is there a similar solution on sports glasses as well?

There are holes or special grooves on the lens surface. This technology effectively counteracts fogging even in low-airflow conditions, providing a constant feeling of comfort for the eyes.