Re: LVTF question

Hi Wayne

Can we solve this with the personlization sematics

In other words out on a blinking flashing region a "blinking" attribute.  We have already a setting coga-distraction. the supported values include "moving" for moving content, but we can include blinking if that is not clearly included. 
The personlization setting could be to remove moving content unless the user requests to load it. 

We have a support personalization success criteria up on the survey. If it gets support we can include this usecase but , unfortunately, to get support we limited to critical and important content. Therefore it would be better to also have a SC that address this specifically. Techniques would include not having blinking/moving content  at all or supporting personlization to remove it automatically.

This is the use case I know about (My daughter) .... She uses an app called nightmode which is very low contrast. Even so, she  puts on very dark glasses when she loads a page. she then closes each region (normally google adds) with blinking or moving content or resized the window to block it. Only when they are all closed can she remove the glasses so she can see enough to try to read the page.

Not great.

Interesting enough she wrote the first version of the personalization script that is now used in the plug in. It would be great if it would actually help her as well :) 

All the best

Lisa Seeman

LinkedIn, Twitter

---- On Wed, 15 Feb 2017 09:26:37 +0200 Wayne Dick<> wrote ---- 


Thank you for bringing this up. Photophobia is a widespread  problem among people with blind spots (TSBVI). This effects people with macular degeneration as well as congenital retina damage like mine. 

We addressed the text issue with the color SC (part c of #78). Images are just a pain (literally) and I just thought we could not address them now. It would involve serious element level intervention. 

Hardware is an extremely  poor solution to this problem. I know. I do it when bright images are just too painful. But  hardware dimming cuts brightness globally even in places where diminished brightness is in effect. However, a software solution would require new assistive technology. So, a solution at the 2.1 level is not possible.


On Tue, Feb 14, 2017 at 8:44 AM, Gregg C Vanderheiden <> wrote:
This looks like the animation SC  - which prevents all of these if they last more than a few seconds.    Prohibiting them all together is a problem in that the are often used to bring attention to important things that would otherwise be missed — and also used to provide cognitive assistance  (how to do things etc.)

The time limit keeps them from preventing use — even if they might delay it a bit for people who are so distracted that the things that are intended to catch their attention — would trap it if they continued. 


 Gregg C Vanderheiden

On Feb 14, 2017, at 11:24 AM, lisa.seeman <> wrote:

That helps, but the worst thing is moving content or  a flashing light or moving content (especially that has a higher contrast)The speed is not an issue and the size of the screen is also not as big an issue as for epilepsy 

I am just going from what I know from my daughter who also has a focusing issue, so it might need better research
What I do know is content with any flashing (what ever the size) or moving will  hurt her

All the best

Lisa Seeman

LinkedIn, Twitter

---- On Mon, 13 Feb 2017 23:59:45 +0200 Alastair Campbell <> wrote ---- 

> I was wondering if we have a SC for severe photophobia -people who get pain 
> from intense light (any size) and flashing (any size) 
The text adaptation one covers colours of foreground/background text, and there is the current 2.3.1 Three Flashes, with it's threshold. 
They would not cover a bright image/video, or a small flashing area though. 
Is that something best dealt with at the OS/hardware level? Presumably to get to a website you'd have to open a browser, which has a large white canvas... So toning down brightness & whites would be important for general use. 
> There should be a semantics to mark any section of elements with flashing 
> moving or blinking and these of these so that they can be blocked and make 
> sure that low contrast can not be overridden 
Possibly, but if you can override it at all, you should be able to override it whether it has semantics or not. 


Received on Wednesday, 15 February 2017 13:07:23 UTC