Discover Essilor’s Stellest lenses

Essilor’s head of industrial relations, Dr Andy Hepworth, speaks with TO about the HALT technology behind new myopia control lenses

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Essilor has launched a new myopia control lens, featuring technology that helps both correct the wearer’s myopia and slow the progression of myopia.

Stellest lenses feature Highly Aspherical Lenslet Target (HALT) technology, which was designed to support slowing myopia.

Describing the HALT technology behind the lenses, Dr Andy Hepworth, Head of Professional Relations for Essilor, explained: “It is a constellation of 1021 invisible aspherical lenses spread over 11 rings of the lens surface, and this they are the ones that cause this slowing down of myopia. progress.”

Aspherical lenses in the same rings are identical, Hepworth shared, while different rings in Stellest lenses provide different optical characteristics.

The lens design creates signal volume in front of the retina to help slow the eye’s elongation.

Hepworth explained: “It is the volume of unfocused light that has been calculated to follow the shape of the theoretical myopic retina of a child. Stellest lenses are designed with this HALT technology to focus light between 1.2mm and 1.9mm in front of the retina.

He added: “To generate this volume, these lenses would match focal points of two trial lenses of approximately +3.50D and +5.50D which would be added to the wearer’s distance prescription respectively.

A clinical trial, conducted with 167 nearsighted children aged 8 to 13, found a 67% reduction in myopia progression on average, compared to similar children wearing single vision lenses.

To the wearer and to outside observers, the lenses appear “like a standard single vision lens,” Hepworth pointed out.

The lenses are tailored to the wearer’s prescription and it is recommended that children wear their lenses during waking hours, at least 12 hours a day.

As a dispensing optician himself, Hepworth shared that although there is a “tremendous amount of technology” underlying the lenses, the dispensing is similar to standard pediatric dispensing. He assured, “It’s not at all complicated in any way, shape or form.”

Essilor offers a 60-minute training course for practitioners dispensing Stellest lenses, and the company has also developed CPD modules around myopia that explore a variety of management options.

Describing how Stellest lenses are made, Hepworth explained that lenses are formed on eyeglass lenses during the production process. What’s more complicated, he suggested, was covering the lenses. The lenses feature Essilor’s Crizal anti-reflective (AR) coating technology and are scratch resistant.

“To produce them – it’s complex – then coat them, then coat them with multiple ARs, it blows your mind as to the complexity, but they’ve managed to achieve this and they really work,” he said.

Watch the full interview with TObelow.

Essilor’s head of industrial relations, Dr. Andy Hepworth, talks about Stellest lenses for the management of myopia