• HOME
  • NEWS
    • BIOENGINEERING
    • SCIENCE NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • FORUM
    • INSTAGRAM
    • TWITTER
  • CONTACT US
Sunday, January 17, 2021
BIOENGINEER.ORG
No Result
View All Result
  • Login
  • HOME
  • NEWS
    • BIOENGINEERING
    • SCIENCE NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • FORUM
    • INSTAGRAM
    • TWITTER
  • CONTACT US
  • HOME
  • NEWS
    • BIOENGINEERING
    • SCIENCE NEWS
  • EXPLORE
    • CAREER
      • Companies
      • Jobs
        • Lecturer
        • PhD Studentship
        • Postdoc
        • Research Assistant
    • EVENTS
    • iGEM
      • News
      • Team
    • PHOTOS
    • VIDEO
    • WIKI
  • BLOG
  • COMMUNITY
    • FACEBOOK
    • FORUM
    • INSTAGRAM
    • TWITTER
  • CONTACT US
No Result
View All Result
Bioengineer.org
No Result
View All Result
Home NEWS Science News Health

Innovative device simulates cataract replacement experience

Bioengineer by Bioengineer
August 18, 2016
in Health
0
Share on FacebookShare on TwitterShare on LinkedinShare on RedditShare on Telegram
IMAGE

WASHINGTON — Today, patients with cataracts can choose from several types of artificial lenses, which are surgically implanted in the eye to replace cloudy lenses that obstruct vision. A new vision simulator could help these patients see how the world would look with each type of implanted artificial lens, before they have surgery.

In The Optical Society’s journal for high impact research, Optica, researchers in Spain describe and demonstrate their new hand-held device called the simultaneous vision simulator, or SimVis. With SimVis, patients can experience how a certain implanted lens would affect their vision by simply looking through the device.

“There are many different intraocular lenses in the market, which provide different balances of near and far vision,” said Aiswaryah Radhakrishan, researcher at the Instituto de Optica, Consejo Superior de Investigaciones Clientificas, Spain. “We have discovered a way to simulate these intraocular lenses and demonstrated a prototype device that allows patients to test different solutions before surgery and choose the one that best suits their needs.”

Choosing the right lens

In the last decade, lens companies have designed intraocular lenses that not only replace the cloudy lens of the eye but can also correct the patient’s vision, to reduce the need for glasses. This correction is not perfect, however. The natural lens is stretched by muscles in the eye to change its shape, and thus its focal length, to shift from having up-close and far objects in sharp focus on the retina. Current implanted intraocular lenses do not have this capability to change shape like this. Instead, standard intraocular lenses are monofocal, i,e, they correct only far vision, which creates sharp vision for far-away objects but blurred vision for objects close by. Patients would then wear glasses to correct near. There are also newer multifocal lenses that focus both near and far objects onto the retina at the same time but with some loss of image quality and contrast for both near and far distances. The choices for monofocal, and, particular multifocal intraocular lenses keeps growing as more designs enter the market.

“Currently, the decision on which intraocular lens is implanted during cataract surgery is typically based on the explanations and experience of the surgeon,” said Carlos Dorronsoro, first author of the paper. “But it is difficult for patients to imagine the new visual experience provided by some of these lenses, therefore, it is very difficult to make the decision.”

The SimVis uses an optoelectronic tunable lens that changes shape in response to an applied electric current. To simulate multifocal lenses, the shape of this tunable lens can be switched so quickly that the resulting oscillations in focal positions can be perceived by human vision. A patient looking through the device would see near and far distances in focus at the same time, as well as experiencing the loss of image quality and contrast that comes with multifocal lenses.

The amount of time the plastic lens remains in a particular focus can be used to vary the lens power dedicated to that state. For example, a bifocal lens with 70 percent far and 30 percent near power is simulated by inducing the far state for 14 milliseconds and the near state for 6 milliseconds and then repeating this pattern continuously.

Testing the vision simulator

The researchers asked nine volunteers to use the SimVis to compare seven different lenses providing monofocal, bifocal or trifocal corrections while looking at a poster of a landscape, a laptop, a tablet, and a smartphone, with high contrast text and eye charts placed at different distances. Based on the lens simulations, the testers indicated clear preferences for certain corrections.

“The favored or rejected lenses were different for different testers, suggesting the need for this kind of simulation prior to surgery to customize the selection of lenses according to patient requirements,” said Dorronsoro. “Clinical use of the SimVis could provide an evidence-based way to assess the subjective needs and preferences of patients before they undergo cataract surgery.”

The researchers are now working on a binocular version of the SimVis that is smaller and can simulate different lenses in each eye. Appearing much like a virtual reality helmet, this new version of the SimVis will also be lighter and have a wider field of view than the device demonstrated in the Optica paper. The researchers are working to complete the necessary clinical validations so that the binocular version of SimVis can be sold commercially by next year.

###

Paper: C. Dorronsoro, A. Radhakrishnan, J.R. Alonso-Sanz, D. Pascual, M. Velasco-Ocana, P. Perez-Merino, S. Marcos, “Portable simultaneous vision device to simulate multifocal corrections,” Optica, 3, 9, 918 (2016). DOI: 10.1364/optica.3.000918.

About Optica

Optica is an open-access, online-only journal dedicated to the rapid dissemination of high-impact peer-reviewed research across the entire spectrum of optics and photonics. Published monthly by The Optical Society (OSA), Optica provides a forum for pioneering research to be swiftly accessed by the international community, whether that research is theoretical or experimental, fundamental or applied. Optica maintains a distinguished editorial board of more than 40 associate editors from around the world and is overseen by Editor-in-Chief Alex Gaeta, Columbia University, USA. For more information, visit Optica.

About The Optical Society

Founded in 1916, The Optical Society (OSA) is the leading professional organization for scientists, engineers, students and entrepreneurs who fuel discoveries, shape real-life applications and accelerate achievements in the science of light. Through world-renowned publications, meetings and membership initiatives, OSA provides quality research, inspired interactions and dedicated resources for its extensive global network of optics and photonics experts. For more information, visit osa.org/100.

Media Contact

Rebecca Andersen
[email protected]
202-416-1443
@opticalsociety

http://www.osa.org

The post Innovative device simulates cataract replacement experience appeared first on Scienmag.

Share12Tweet7Share2ShareShareShare1

Related Posts

IMAGE

Rapid blood test identifies COVID-19 patients at high risk of severe disease

January 15, 2021
IMAGE

Special interests can be assets for youth with autism

January 15, 2021

Principles of care established for young adults with substance use disorders

January 15, 2021

USC study measures brain volume differences in people with HIV

January 15, 2021
Next Post
blank

Study confirms long-term effects of ‘chemobrain’ in mice

Fruit flies could be key to fighting cervical cancer caused by human papillomavirus

Leave a Reply Cancel reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.

POPULAR NEWS

  • IMAGE

    The map of nuclear deformation takes the form of a mountain landscape

    53 shares
    Share 21 Tweet 13
  • Blood pressure drug may be key to increasing lifespan, new study shows

    44 shares
    Share 18 Tweet 11
  • New drug form may help treat osteoporosis, calcium-related disorders

    38 shares
    Share 15 Tweet 10
  • New findings help explain how COVID-19 overpowers the immune system

    35 shares
    Share 14 Tweet 9

About

We bring you the latest biotechnology news from best research centers and universities around the world. Check our website.

Follow us

Tags

Climate ChangeChemistry/Physics/Materials SciencesBiologyInfectious/Emerging DiseasesTechnology/Engineering/Computer ScienceMedicine/HealthEcology/EnvironmentMaterialsGeneticscancerPublic HealthCell Biology

Recent Posts

  • Better diet and glucose uptake in the brain lead to longer life in fruit flies
  • Rapid blood test identifies COVID-19 patients at high risk of severe disease
  • Conductive nature in crystal structures revealed at magnification of 10 million times
  • Howard University professor to receive first Joseph A. Johnson Award
  • Contact Us

© 2019 Bioengineer.org - Biotechnology news by Science Magazine - Scienmag.

No Result
View All Result
  • Homepages
    • Home Page 1
    • Home Page 2
  • News
  • National
  • Business
  • Health
  • Lifestyle
  • Science

© 2019 Bioengineer.org - Biotechnology news by Science Magazine - Scienmag.

Welcome Back!

Login to your account below

Forgotten Password?

Create New Account!

Fill the forms below to register

All fields are required. Log In

Retrieve your password

Please enter your username or email address to reset your password.

Log In