Re: Mobile needs a question answered

Hi Jim,

Was that for seeing things, or hitting the targets?

Those seem like different problems, especially as the touch-screen OSs have heuristics so that if you tap between two targets, it guesses which you meant...

-Alastair

Apologies for typos, sent from a mobile.

________________________________
From: Jonathan Avila <jon.avila@levelaccess.com>
Sent: Tuesday, January 29, 2019 11:45 pm
To: Wayne Dick; Jim Allan
Cc: public-low-vision-a11y-tf
Subject: RE: Mobile needs a question answered

HI Wayne, I also think that people with low vision might need more space because touch might not be as precise given that a person may be holding the device closer to their face and not have the same perspective as distance.  Also scotomas may also impact touch target accuracy for some users.

Jonathan

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From: Wayne Dick <wayneedick@gmail.com>
Sent: Tuesday, January 29, 2019 5:24 PM
To: Jim Allan <jimallan@tsbvi.edu>
Cc: public-low-vision-a11y-tf <public-low-vision-a11y-tf@w3.org>
Subject: Re: Mobile needs a question answered

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Hi All,
Well all zoomed pixels are large, but that is only so that we can see them. So, I would assume that it takes 2-pixels for full sighted readers to separate things, it would take us 2 big pixels to distinguish things.

Wayne

On Tue, Jan 29, 2019 at 1:47 PM Jim Allan <jimallan@tsbvi.edu<mailto:jimallan@tsbvi.edu>> wrote:
How many pixels in between 2 active elements on a screen meets user need on the low-vision side? Mobile TF have it at two pixels.
And does the overall target size impact the spacing between elements requirement?
Anybody have any ideas or research?




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Jim Allan, Accessibility Coordinator
Texas School for the Blind and Visually Impaired
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voice 512.206.9315    fax: 512.206.9452 http://www.tsbvi.edu/
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