Epilepsy?
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Plusnet Community
- :
- Forum
- :
- Other forums
- :
- General Chat
- :
- Epilepsy?
Epilepsy?
Epilepsy?
23-12-2013 1:34 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
At one end of the room was a Christmas tree with twinkling lights.
A family member took the young ones in our group, arranged them at the foot of the tree and started taking photos of them.
A lady sitting at a table near the tree asked the family member to turn off the camera flash.
Apparently someone else at her table was being affected by the flash and was shielding her eyes and shaking.
I had never personally come across this before but understood the situation and the photography stopped.
Customer and Forum Moderator.
Re: Epilepsy?
Re: Epilepsy?
23-12-2013 1:48 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Epilepsy?
Re: Epilepsy?
23-12-2013 2:28 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Frequently, prior to a news item or even a pop video, it would be announced that the item contains flash photography so sufferers could change channels.
Forum Moderator and Customer
Courage is resistance to fear, mastery of fear, not absence of fear - Mark Twain
He who feared he would not succeed sat still
Re: Epilepsy?
Re: Epilepsy?
23-12-2013 3:08 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Epilepsy?
Re: Epilepsy?
23-12-2013 5:51 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Epilepsy?
Re: Epilepsy?
23-12-2013 6:16 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator

Re: Epilepsy?
Re: Epilepsy?
23-12-2013 6:24 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Epilepsy?
Re: Epilepsy?
23-12-2013 6:37 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: Oldjim I haven't seen a flash bulb for years - I even remember using them
The memories of my early photography.
Forum Moderator and Customer
Courage is resistance to fear, mastery of fear, not absence of fear - Mark Twain
He who feared he would not succeed sat still
Re: Epilepsy?
Re: Epilepsy?
23-12-2013 6:45 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote Most people with photosensitive epilepsy are sensitive to 16-25 Hz. Some people may be sensitive to rates as low as 3 Hz and as high as 60 Hz.
Quote Around three in every 100 people with epilepsy have photosensitive epilepsy.
(According to Epilepsy Action https://www.epilepsy.org.uk/ ).
That figure seems rather low to me.
Re: Epilepsy?
Re: Epilepsy?
23-12-2013 8:09 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator

Re: Epilepsy?
Re: Epilepsy?
23-12-2013 8:11 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: 7up Heck, my girl can't even do 360 round a roundabout without getting dizzy
Tell me about it. SWMBO is exactly the same

Forum Moderator and Customer
Courage is resistance to fear, mastery of fear, not absence of fear - Mark Twain
He who feared he would not succeed sat still
Re: Epilepsy?
Re: Epilepsy?
23-12-2013 8:15 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: vilefoxdemonofdoom Some people may be sensitive to rates as low as 3 Hz
Flash guns used to fire a single burst but the flash in modern cameras can fire a short series of flashes possibly around 3 per second so I can see how people sensitive as mentioned about would be affected.
Customer and Forum Moderator.
Re: Epilepsy?
Re: Epilepsy?
23-12-2013 8:18 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: Strat
...but the flash in modern cameras can fire a short series of flashes possibly around 3 per second...
I've often wondered why they do that? Even in daylight I've seen the light flicker when the shutter button is just partly pressed.
Forum Moderator and Customer
Courage is resistance to fear, mastery of fear, not absence of fear - Mark Twain
He who feared he would not succeed sat still
Re: Epilepsy?
Re: Epilepsy?
23-12-2013 8:21 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Other 'pre-flashes' are used by the autofocus.
Customer and Forum Moderator.
Re: Epilepsy?
Re: Epilepsy?
23-12-2013 8:23 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator

Forum Moderator and Customer
Courage is resistance to fear, mastery of fear, not absence of fear - Mark Twain
He who feared he would not succeed sat still
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page