Re: Mobile needs a question answered

Hi Alastair,
It kind of reduces to the same thing. It easy to miss a target you cannot
separate from another. I'm a little embarrassed to admit how many times I
hit the wrong target.
Wayne

On Wed, Jan 30, 2019 at 12:41 AM Alastair Campbell <acampbell@nomensa.com>
wrote:

> 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
>
>
>
> Jonathan Avila, CPWA
>
> Chief Accessibility Officer
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> *Level Access*
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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> 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?
>
>
>
>
>
>
>
> --
>
> Jim Allan, Accessibility Coordinator
>
> Texas School for the Blind and Visually Impaired
> 1100 W. 45th St., Austin, Texas 78756
> voice 512.206.9315    fax: 512.206.9452 http://www.tsbvi.edu/
>
> "We shape our tools and thereafter our tools shape us." McLuhan, 1964
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