Smartphone making your eyes tired?

July 21, 2011 in Health

Several reports indicate that prolonged viewing of mobile devices and other stereo 3D devices leads to visual discomfort, fatigue and even headaches. According to a new Journal of Vision study, the root cause may be the demand on our eyes to focus on the screen and simultaneously adjust to the distance of the content.

Scientifically referred to as vergence-accommodation, this conflict and its effect on viewers of stereo 3D displays are detailed in a recent Journal of Vision article, The Zone of Comfort: Predicting Visual Discomfort with Stereo Displays.

"When watching stereo 3D displays, the eyes must focus — that is, accommodate — to the distance of the screen because that's where the light comes from. At the same time, the eyes must converge to the distance of the stereo content, which may be in front of or behind the screen," explains author Martin S. Banks, professor of optometry and vision science, University of California, Berkeley.

Through a series of experiments on 24 adults, the research team observed the interaction between the viewing distance and the direction of the conflict, examining whether placing the content in front of or behind the screen affects viewer discomfort. The results demonstrated that with devices like mobile phones and desktop displays that are viewed at a short distance, stereo content placed in front of the screen — appearing closer to the viewer and into the space of viewer's room — was less comfortable than content placed behind the screen. Conversely, when viewing at a longer distance such as a movie theater screen, stereo content placed behind the screen —appearing as though the viewer is looking through a window scene behind the screen — was less comfortable.

"Discomfort associated with viewing Stereo 3D is a major problem that may limit the use of technology," says Banks. "We hope that our findings will inspire more research in this area."

The team of investigators suggests future studies focus on a larger sample in order to develop population-based statistics that include children. With the explosion of stereo 3D imagery in entertainment, communication and medical technology, the authors also propose guidelines be established for the range of disparities presented on such displays and the positioning of viewers relative to the display.

"This is an area of research where basic science meets application and we hope that the science can proceed quickly enough to keep up with the increasingly widespread use of the technology," adds Banks.

Provided by Association for Research in Vision and Ophthalmology search and more info website

not rated yet  

Rank not rated yet
Relevant PhysicsForums posts

More news stories

Early physical therapist treatment associated with reduced risk of healthcare utilization and reduced overall healthcare

A new study published in Spine shows that early treatment by a physical therapist for low back pain (LBP), as compared to delayed treatment, was associated with reduced risk of subsequent healthcare utilization and lower ...

Health created 1 hour ago | popularity not rated yet | comments 0 | with audio podcast

Cancer patients share web info with docs for insight, advice

(HealthDay) -- Cancer patients' primary goal in talking with their doctors about information they've found on the Internet is to get more insight and advice on the online information, new research indicates.

Health created 4 hours ago | popularity not rated yet | comments 0

P&G to add latches to make detergent packs safer

(AP) -- Procter & Gamble says it will change the design of packaging for its miniature laundry detergent product to deter children from eating the brightly colored packets that look like candy.

Health created 4 hours ago | popularity not rated yet | comments 0

In Spain, 70 percent of women use contraceptives during their first sexual encounter

Contraceptive use in Spain during the first sexual encounter is similar to other European countries. However, there are some geographical differences between Spanish regions: women in Murcia use contraceptives ...

Health created 5 hours ago | popularity not rated yet | comments 0

WHO target to cut early chronic illness deaths

The World Health Organization announced on Friday it was set to approve a new target to reduce premature deaths from chronic illnesses such as heart disease by a quarter by 2025.

Health created 6 hours ago | popularity not rated yet | comments 0


Of mice and mental models: Neuroscientific implications of risk-optimized behavior in the mouse

(Medical Xpress) -- Regardless of an organism’s biological complexity, every encephalized animal continuously makes under-informed behavioral choices that can have serious consequences. Despite its ubiquity, ...

Cancer may require simpler genetic mutations than previously thought

Chromosomal deletions in DNA often involve just one of two gene copies inherited from either parent. But scientists haven't known how a deletion in one gene from one parent, called a "hemizygous" deletion, can contribute ...

Skp2 activates cancer-promoting, glucose-processing Akt

HER2 and its epidermal growth factor receptor cousins mobilize a specialized protein to activate a major player in cancer development and sugar metabolism, scientists report in the May 25 issue of Cell.

Inherited DNA change explains overactive leukemia gene

A small inherited change in DNA is largely responsible for overactivating a gene linked to poor treatment response in people with acute leukemia.

Implantable pain disk may help those with cancer

An estimated 3.5 million cancer patients around the globe are in severe pain from their disease, but many get no relief.

First study to suggest that the immune system may protect against Alzheimer's changes in humans

Recent work in mice suggested that the immune system is involved in removing beta-amyloid, the main Alzheimer's-causing substance in the brain. Researchers have now shown for the first time that this may apply in humans.