Spiral Contact Lenses Let You See Near & Far Without Going Out Of Focus

Image generated on AI

Demonstrating great foresight, researchers in France have developed a revolutionary new lens design that offers clear focus near and far, without the drawbacks of traditional multifocal lenses.

The secret lies in the unique spiral shape of the lens, which the inventors have coined the “spiral diopter.” This design creates multiple focal points, essentially acting like several lenses layered into one. Inspired by the way light interacts with severely deformed corneas, it features an optical vortex that allows light to focus at various distances.

Published in the journal Optica by the Optica Publishing Group, the research team, led by Bertrand Simon of the Photonics, Numerical and Nanosciences Laboratory (LP2N), has introduced a lens that outperforms existing multifocal lenses by maintaining clear vision across a wide range of light conditions, regardless of pupil size.

Image via Laurent Galinier / Optica

“For potential implant users or people with age-related farsightedness, it could provide consistently clear vision, potentially revolutionizing ophthalmology,” explains Simon.

Advanced digital machining was used to form the intricate spiral shape, and initial tests using the lens to image a digital letter “E” demonstrated consistent image quality regardless of the aperture size. Additionally, volunteers reported significant improvements in visual acuity at various distances and lighting conditions.

This invention extends beyond individual vision correction. The spiral diopter’s potential applications include enhancing depth perception in changing light conditions, creating more compact imaging technologies, and even improving the reliability and efficiency of wearable devices and remote sensing systems used in drones and self-driving cars.

Image via Laurent Galinier / Optica

While these results are promising, further exploration is needed. The team is currently investigating the unique way light interacts with the lens and planning comprehensive trials. 

Peering ahead, the researchers are exploring the possibility of incorporating this design into prescription eyeglasses, making way for a future of clear and adaptable vision without the usual distortions.

[via Freethink, ScienceDaily, SciTechDaily, images via various sources]