fbpx

Study Emphasizes Need to Correct Astigmatism in Soft Contact Lens Wearers

A study using a new infrared imaging technique underscores the need for eye care professionals to fully correct astigmatic refractive errors of 0.75DC or more in soft contact lens wearers for optimal visual acuity (VA), regardless of their pupil size. Development of a novel dynamic pupil control system to evaluate the impact of uncorrected astigmatic error on visual performance (Read M, et al) is being presented at the 2022 American Academy of Optometry annual meeting this week.

Investigators from Eurolens Research at the University of Manchester and CooperVision employed a unique Pupil Control System (PUCS) to precisely specify and control pupil size of study participants during a VA assessment, then characterize the impact of uncorrected astigmatism. Sixty eyes requiring astigmatic correction from plano to -1.50DC were each evaluated at three pupil sizes (2.5 mm, 4 mm and 5.5 mm) using full sphero-cylindrical spectacle correction, full sphero-cylindrical correction with a custom toric soft contact lens, and best sphere correction using a spherical soft contact lens.

VA was reduced with increased pupil size for all three refractive correction methods, attributed to greater aberrations as pupils enlarged. When the cylindrical power was -0.75DC or greater, uncorrected astigmatism had a statistically and clinically significant negative impact on VA between the spherical contact lens group and both the toric contact lens and spectacle groups (p<0.001, F=4.5).

“Some eye care professionals continue to fit spherical contact lenses for people with lower yet significant amounts of astigmatism. This new work adds to a sizable body of evidence that indicates attempting to ‘mask’ astigmatism with single vision lenses is an outdated and detrimental practice,” said Gary Orsborn, OD, MS, FAAO, FBCLA, Global Head, Post-Market Clinical Studies for CooperVision and a paper co-author. “With multiple high performing toric soft contact lenses on the market, including widely prescribed options within the CooperVision MyDay®, clariti®, and Biofinity® families, there is little reason to use spherical lenses with patients who have astigmatism of 0.75DC or greater.”

The Eurolens PUCS technology comprises a custom infrared imaging system with live image analysis software to monitor pupil size in real time. The system continuously adjusts the output of diffused LED lamps within an enclosure that surrounds the participant’s head to maintain a predetermined pupil size. This innovation is likely to be used in other research to evaluate complex optical designs for refractive correction, according to the paper authors.

Funded by CooperVision, this study joins multiple company-led and funded scientific papers and posters that will be presented at the American Academy of Optometry meeting, which takes place from October 26-29 in San Diego, Calif.

Click HERE for the full press release.

Featured Posts

Elegant GIGI STUDIOS glasses with tortoiseshell frames on a clear, shattered glass surface with green foliage accents

The Art of the Frame: Unveiling GIGI STUDIOS’ Fashion‑Forward Vision

Explore GIGI STUDIOS' legacy in eyewear, blending artisanal craftsmanship with innovative designs. Discover their commitment to sustainability and the stylish 'Le Club de Lecture' campaign.

Learn More
Nikon Optical Canada logo

Now Available! Nikon’s Accredited Self-Learning Training Modules

Nikon Optical Canada is now offering accredited training modules for opticians and optometric assistants.

Learn More
Elegant GIGI STUDIOS glasses with tortoiseshell frames on a clear, shattered glass surface with green foliage accents

The Art of the Frame: Unveiling GIGI STUDIOS’ Fashion‑Forward Vision

Explore GIGI STUDIOS' legacy in eyewear, blending artisanal craftsmanship with innovative designs. Discover their commitment to sustainability and the stylish 'Le Club de Lecture' campaign.

Read more
Global Myopia Awareness Coalition

Global Myopia Awareness Coalition Unveils 2024 Board Members

Olga Prenat with EssilorLuxottica to serve as 2024 Board Chair

Read more
American Optometric Association and World Council of Optometry

WCO to Host WCO5 in Partnership with AOA at Optometry’s Meeting® 2025

The World Council of Optometry (WCO) announces the hosting of the 5th World Congress of Optometry (WCO5) in collaboration with the American Optometric Association (AOA) and the American Optometric Student Association (AOSA) during the esteemed 128th Annual AOA Congress & 57th Annual AOSA Conference: Optometry's Meeting® 2025.

Read more
Photograph of an old building in New Orleans with prominent balconies.

Academy New Orleans: The New Grad Experience

Highlights from Academy, the AAO 2023 Optometry Conference: a dynamic gathering of education, innovation, and community, shaping the future of optometry for students and professionals.

Read more
Voila Optik March-April 2024 Morel Ginette

Glamour from the Retro Era!

Morel revisits the past and highlights its heritage by introducing the Ginette concept, offering frames with retro charm and iconic styles from the 50s.

Read more
Elegant GIGI STUDIOS glasses with tortoiseshell frames on a clear, shattered glass surface with green foliage accents

The Art of the Frame: Unveiling GIGI STUDIOS’ Fashion‑Forward Vision

Explore GIGI STUDIOS' legacy in eyewear, blending artisanal craftsmanship with innovative designs. Discover their commitment to sustainability and the stylish 'Le Club de Lecture' campaign.

Learn More
Nikon Optical Canada logo

Now Available! Nikon’s Accredited Self-Learning Training Modules

Nikon Optical Canada is now offering accredited training modules for opticians and optometric assistants.

Learn More
Elegant GIGI STUDIOS glasses with tortoiseshell frames on a clear, shattered glass surface with green foliage accents

The Art of the Frame: Unveiling GIGI STUDIOS’ Fashion‑Forward Vision

Explore GIGI STUDIOS' legacy in eyewear, blending artisanal craftsmanship with innovative designs. Discover their commitment to sustainability and the stylish 'Le Club de Lecture' campaign.

Read More
Global Myopia Awareness Coalition

Global Myopia Awareness Coalition Unveils 2024 Board Members

Olga Prenat with EssilorLuxottica to serve as 2024 Board Chair

Read More
American Optometric Association and World Council of Optometry

WCO to Host WCO5 in Partnership with AOA at Optometry’s Meeting® 2025

The World Council of Optometry (WCO) announces the hosting of the 5th World Congress of Optometry (WCO5) in collaboration with the American Optometric Association (AOA) and the American Optometric Student Association (AOSA) during the esteemed 128th Annual AOA Congress & 57th Annual AOSA Conference: Optometry's Meeting® 2025.

Read More
Photograph of an old building in New Orleans with prominent balconies.

Academy New Orleans: The New Grad Experience

Highlights from Academy, the AAO 2023 Optometry Conference: a dynamic gathering of education, innovation, and community, shaping the future of optometry for students and professionals.

Read More
Voila Optik March-April 2024 Morel Ginette

Glamour from the Retro Era!

Morel revisits the past and highlights its heritage by introducing the Ginette concept, offering frames with retro charm and iconic styles from the 50s.

Read More
Elegant GIGI STUDIOS glasses with tortoiseshell frames on a clear, shattered glass surface with green foliage accents

The Art of the Frame: Unveiling GIGI STUDIOS’ Fashion‑Forward Vision

Explore GIGI STUDIOS' legacy in eyewear, blending artisanal craftsmanship with innovative designs. Discover their commitment to sustainability and the stylish 'Le Club de Lecture' campaign.

Learn More
Nikon Optical Canada logo

Now Available! Nikon’s Accredited Self-Learning Training Modules

Nikon Optical Canada is now offering accredited training modules for opticians and optometric assistants.

Learn More
Elegant GIGI STUDIOS glasses with tortoiseshell frames on a clear, shattered glass surface with green foliage accents

The Art of the Frame: Unveiling GIGI STUDIOS’ Fashion‑Forward Vision

Explore GIGI STUDIOS' legacy in eyewear, blending artisanal craftsmanship with innovative designs. Discover their commitment to sustainability and the stylish 'Le Club de Lecture' campaign.

Read more
Global Myopia Awareness Coalition

Global Myopia Awareness Coalition Unveils 2024 Board Members

Olga Prenat with EssilorLuxottica to serve as 2024 Board Chair

Read more
American Optometric Association and World Council of Optometry

WCO to Host WCO5 in Partnership with AOA at Optometry’s Meeting® 2025

The World Council of Optometry (WCO) announces the hosting of the 5th World Congress of Optometry (WCO5) in collaboration with the American Optometric Association (AOA) and the American Optometric Student Association (AOSA) during the esteemed 128th Annual AOA Congress & 57th Annual AOSA Conference: Optometry's Meeting® 2025.

Read more
Photograph of an old building in New Orleans with prominent balconies.

Academy New Orleans: The New Grad Experience

Highlights from Academy, the AAO 2023 Optometry Conference: a dynamic gathering of education, innovation, and community, shaping the future of optometry for students and professionals.

Read more
Voila Optik March-April 2024 Morel Ginette

Glamour from the Retro Era!

Morel revisits the past and highlights its heritage by introducing the Ginette concept, offering frames with retro charm and iconic styles from the 50s.

Read more
Elegant GIGI STUDIOS glasses with tortoiseshell frames on a clear, shattered glass surface with green foliage accents

The Art of the Frame: Unveiling GIGI STUDIOS’ Fashion‑Forward Vision

Explore GIGI STUDIOS' legacy in eyewear, blending artisanal craftsmanship with innovative designs. Discover their commitment to sustainability and the stylish 'Le Club de Lecture' campaign.

Learn More
Nikon Optical Canada logo

Now Available! Nikon’s Accredited Self-Learning Training Modules

Nikon Optical Canada is now offering accredited training modules for opticians and optometric assistants.

Learn More
Elegant GIGI STUDIOS glasses with tortoiseshell frames on a clear, shattered glass surface with green foliage accents

The Art of the Frame: Unveiling GIGI STUDIOS’ Fashion‑Forward Vision

Explore GIGI STUDIOS' legacy in eyewear, blending artisanal craftsmanship with innovative designs. Discover their commitment to sustainability and the stylish 'Le Club de Lecture' campaign.

Read more
Global Myopia Awareness Coalition

Global Myopia Awareness Coalition Unveils 2024 Board Members

Olga Prenat with EssilorLuxottica to serve as 2024 Board Chair

Read more
American Optometric Association and World Council of Optometry

WCO to Host WCO5 in Partnership with AOA at Optometry’s Meeting® 2025

The World Council of Optometry (WCO) announces the hosting of the 5th World Congress of Optometry (WCO5) in collaboration with the American Optometric Association (AOA) and the American Optometric Student Association (AOSA) during the esteemed 128th Annual AOA Congress & 57th Annual AOSA Conference: Optometry's Meeting® 2025.

Read more
Photograph of an old building in New Orleans with prominent balconies.

Academy New Orleans: The New Grad Experience

Highlights from Academy, the AAO 2023 Optometry Conference: a dynamic gathering of education, innovation, and community, shaping the future of optometry for students and professionals.

Read more
Voila Optik March-April 2024 Morel Ginette

Glamour from the Retro Era!

Morel revisits the past and highlights its heritage by introducing the Ginette concept, offering frames with retro charm and iconic styles from the 50s.

Read more