It isn't obvious that sign language, gestures to replace hearing words, would have regional dialects - accents - but it is so, according to Jami Fisher, a lecturer in the University of Pennsylvania's Department of Linguistics, who is working on a project to document what they're calling the Philadelphia accent of this language.

What differentiates one region of American Sign Language from other such dialects? Why do those in the deaf community have an intuition that it's different? And how could scientists understand the regional variation?

When people are listening to music, their emotional reactions to the music are reflected in changes in their pupil size. Researchers from the University of Vienna and the University of Innsbruck, Austria, are the first to show that both the emotional content of the music and the listeners' personal involvement with music influence pupil dilation. A new paper demonstrates that pupil size measurement can be effectively used to probe listeners' reactions to music.

You know our eyelids blink but less know is that so does the human brain, dropping a few frames of visual information here and there.

Those lapses of attention come fast -- maybe just once every tenth of a second. But some people may be missing more than others, according to psychologists at the University of Wisconsin-Madison.

"Intuitively we have this sense that we're viewing the world in a continuous stream, constantly taking in the same amount of information," says Jason Samaha, a University of Wisconsin-Madison doctoral student in psychology. "So if I told people that every 100 milliseconds their brains were taking a bit of a break, I think that would surprise a lot of them."

Scientists have discovered that the high pressure in the eye that occurs with most common forms of glaucoma can trigger two genes that work together to cause vision loss, a finding that may help pave the way for new glaucoma drugs.

There is currently no way to prevent onset or worsening of glaucoma and it is usually treated by managing fluid pressure inside the eye.

The researchers looked at the genes involved in primary open-angle glaucoma, the most common form of the disease, which usually affects people over 50 and can cause blindness.

Imagine yourself as a graphic designer for New Age musician Enya, tasked with creating her next album cover. Which two or three colors from the grid below do you think would “go best” with her music?

Would they be the same ones you’d pick for an album cover or music video for the heavy metal band Metallica?

Probably not.

Author provided

The consistency of the whole appearance rather than the attractiveness of the parts is not just  saying, it's science, according to a study where participants were shown schematic point-light displays that depict a person using 15 moving dots.

The representation conveyed both the individual characteristics of a person's movements and their individual body shape. 

The team isolated these two areas and separately measured the attractiveness of individual movement styles as well as individual body shapes based on ratings obtained from his research participants. The researchers then combined the movement style of one person with the body shapes of another person and collected attractiveness ratings from these "hybrid walkers".

Researchers at the Medical and Surgical Center for Retina have developed software that detects eye diseases such as diabetic macular edema using a smartphone. 

The technology was designed for general physicians who support the health system in Mexico to detect certain abnormalities without  an ophthalmologist and send the patient to the specialist.

It's obviously better and cheaper to prevent blindness rather than try to cure it so an app on a cellphone that just needs to focus on the eye is better in all ways. This is especially important in rural communities, where expertise areas such as ophthalmology won't be commonly available.

I’m on the back seat of the lower deck of a number 37 bus, outside the red-brick and Portland stone clock tower of Lambeth Town Hall in Brixton, south London.  Although I know exactly where I am, I feel lost. I no longer know whether to trust what my eyes are telling me.

I’ve just been told by a leading vision scientist that I have no real depth perception. 

In other words, I have never seen in three dimensions the way most people do.

Lisa Marie Potter, Inside Science - Thank goodness for autostabilization, the digital camera feature that compensates for movement to achieve that crystal-clear, spontaneous selfie.

Myopia or short-sightedness is becoming more common across Europe, according to a new meta-analysis of findings from 15 studies by the European Eye Epidemiology Consortium which found that around a quarter of the European population is short-sighted but it is nearly twice as common in younger people, with almost half (47 per cent) of the group aged between 25 and 29 years affected.