It’s a struggle that many spectacle wearers face on a daily basis, but the days of carrying around your reading glasses may soon be a thing of the past, thanks to new ‘tunable’ spectacles.
The futuristic glasses can change their strength with a rotary knob, depending on what the wearer is using them for.
They can change the focus from -5 to +2 within seconds, and it no longer has to carry pairs of specifications with you.
The San Francisco-based designers hope their glasses can help people suffering from presbyopia – a condition that affects the eyes’ ability to focus on nearby objects, causing sufferers to need different glasses for different activities. .

The futuristic glasses can change their strength with a rotary knob, depending on what the wearer is using them for
The tunable goggles, called the VOY goggles, have a small knob on each arm.
To adjust the lenses, the wearer can simply turn the wheel away from the nose for a more negative force, or turn the wheel to the nose for a more positive force.
On its website, the designers explain: “You can adjust one eye at a time and then open your vision with both eyes for the most comfortable view.”
The glasses use a technology first developed in the 1960s by Luis Walter Alvarez, a Nobel Prize-winning physicist.
The technology relies on two polycarbonate plates on either side of the glasses that slide over each other when the wheel is adjusted.
Depending on the position of the plates, the strength of the lenses is adjusted.
This technology is already being used in a range of other settings, including smartphone zoom cameras and medical devices.
The VOY glasses are either glasses or sunglasses and have a blue light blocker, anti-reflection and UV protection coatings.
They currently cost $ 79 (£ 58.55) and are available in different colors – black, turtle, brown, gray, burgundy and white.

The glasses use a technology first developed in the 1960s by Luis Walter Alvarez, a Nobel Prize-winning physicist.

Surprisingly, the glasses can change from -5 to +2 in a matter of seconds, eliminating the need to take multiple pair specifications with you.

The VOY glasses are glasses or sunglasses and have a blue light blocker, anti-reflection and UV protection covers.
This week, the glasses were awarded the 2021 Innovation Award in the category of portable technology at the Consumer Electronics Show (CES).
CES is normally held every January in Las Vegas, with thousands of exhibitors and more than 170,000 attendees unveiling a wide variety of new articles.
By 2021, however, the convention will move online with a new ‘digital venue’ created using Microsoft as a central hub for the program’s main announcements.
Gary Shapiro, president of the Consumer Technology Association (CTA), which organizes the event, said the event will ‘make history’ this year as its ‘first digital show’.
“This new experience features more than 1,000 exhibitors from around the world, showcasing the latest trends and innovations in artificial intelligence, 5G, digital health, smart cities, vehicle technology and more,” he said.
“Technology will move us forward and CES 2021 will illustrate how innovation paves the way for a brighter tomorrow.”