WHAT ARE NO-HEIGHT PROGRESSIVE LENSES?
No-height progressive lenses are innovative free-form progressive lenses that offer a maximum optical performance and an optimal visual comfort without requiring specific fitting height measurements.
HOW DO NO-HEIGHT PROGRESSIVE LENSES
WORK WITHOUT FITTING HEIGHT MEASUREMENTS?
Based on frame features, individual prescription, pupillary distance and eye-lens ergonomic studies, our no-height lenses have been designed using an advanced lens design algorithm and the free-form manufactory technology. They offer a maximum optical performance, an optimal visual comfort in removing fitting height requirements by leveraging following key factors:
1
Wider corridor and extended field of view
To enhance optical performance in accommodating a wide range of prescriptions, wider corridor and extended fields of view for no-height lenses are created, which help ensure that wearers would access the different vision zones even if the lenses aren't perfectly aligned with their eyes.
2
Gradient and smooth power progression
Among 7 available corridor lengths, in considering statistical data about average eye movements, visual needs and frame features, the corridor length of no-height progressive lenses is optimized to create a smoother and gradient power progression along the corridor to offer optimal visual comfort in allowing for some flexibility in vertical lens positioning.
3
Minimized peripherical distortion
Using an advanced lens design algorithm, unwanted distortion in the peripheral areas of our no-height progressive lenses is minimized by removing oblique astigmatism up to 99.5% (compared to 57% in maximum for any standard progressive lenses), making no-height progressive lenses easier to adapt to for wearers.
4
Wearer adaptation with natural head positioning
Wearers naturally learn to position their heads and eyes to find the optimal viewing areas for different distances. This unconscious adjustment helps compensate for any minor inaccuracies in lens positioning.
WHAT ARE THE MAIN ADVANTAGES OF
NO-HEIGHT PROGRESSIVE LENSES?
Simplified process
By removing the need for fitting height measurements, the ordering and lens fitting process becomes simpler and faster in combining with virtual try-on and remote PD measurement.
Maximum optical performance
No-height lenses provide wider fields of view and higher level of clarity for far, intermediate and near vision.
Optimal visual comfort
By minimizing peripherical distortion and having a smoother power progression along the corridor, no-height lenses offer smooth transitions between vision zones in reducing swim effect.
