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A bridge between the eye and light

Varilux® Physio® extensee™ lenses provide high vision intensity in any light¹ and extra visual sharpness and contrast², allowing progressive lens wearers to maximize their quality of vision no matter the time of the day. 

The Dynamic Pupil

The pupil is remarkable in its ability to constantly adjust to a wide range of light levels. Thanks to its dynamism, it can provide clear and comfortable vision at any time of the day. Enlarging with dim light and decreasing with bright light, it can reach a constriction speed of 5mm per second³ and change up to four times in size⁴.

Most current progressive lenses are designed with the assumption that the wearer’s pupil size is fixed in all lighting situations impacting its vision quality with a degradation of sharpness and contrast perception.

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1 Varilux® Physio® extensee™ – in-real life consumer study - Eurosyn – 2024 – France (n=79 progressive lens wearers [75/79]) 

2 Varilux® Physio® extensee™ – in-real life consumer study - Eurosyn – 2024 – France (n=79 progressive lens wearers [69/79]) 

3 Ishikawa, Masaaki. (2021). Clinical Factors Affecting Pupillary Light Reflex Parameters: A Single-centre, Cross-sectional Study. Ophthalmic and Physiological Optics, 41(no. 5), 952–60. 

4 Lazar, Rafael, Josefine Degen, Ann-Sophie Fiechter, Aurora Monticelli, and Manuel Spitschan. (2023). Regulation of Pupil Size in Natural Vision across the Human Lifespan. Preprint. Neuroscience.