I am a 34 Year old male and have complex eye conditions (strabismus/amblyopia/myopia/astigmatism) inherent since premature birth.
Regardless of this, since an infant I have had prolonged exposure to Televisions, Household lighting, PC's, Games Consoles, Car Lights/Street Lighting, without any form of discomfort.
Since the age of 10 I have owned and used a PC for on average at least 4 hours a day - this is including time used during school and time at home for homework. After finishing school and starting College to study ICT, I started to use computers much more intensively for my education and also using PC's creatively at home to research or to write music/play games. I would estimate during 2000-2004 I would use a PC on average 12 hours a day. During this period no discomfort was noted, and my eye prescription remained stable.
After starting full-time employment my computer use remained consistent. Add onto this use of newer LCD TV's, Playstation 3, Nintendo Wii, PSP, and various games consoles, I was never usually away from an item of technology, but perhaps more importantly, did not suffer any discomfort.
When I bought my first LED monitor and iPhone around the start of this decade, I noticed the white of the LED seemed somehow 'different' to the LCD monitors before. Nethertheless I continued to use technology for my career's sake and my personal life.
During 2012 I started to experience pressure spikes in my right eye. This caused loss of vision/blackouts in the eye and extreme throbbing headaches. Eventually these very scary symptoms subsided and my vision returned to normal. I visited a doctor and even paid for a MRI scan of my brain to rule out any neurological issues. According to my optician my eyes were fine - it wasn't a pressure issue, they suggested it was migraines.
After my persistence over the next 3 years, and the debilitating nature of these symptoms (I would have no vision in the right eye for 5 hours a day with constant headache), I finally got a visit to my local eye clinic, where thankfully the symptoms were present while I had a pressure check. I had EXTREMELY high (over 60) pressure in the right eye, there and then I had to have a laser iridotomy, should that have failed surgerical procedures would have to have taken place that day. They said I was lucky there wasn't permanent damage to the optical nerve.
The 'high pressure' eye episodes would start with a flash of veins matching my pulse when looking into a bright light, followed by cloudy aura in that eye, and finally, a black area surrounding the entire central vision of the eye. The eye itself would feel larger and harder compared to the left eye, and it was extremely painful.
Why I feel this is relevant; due to my complex eye conditions I have had regular check ups throughout my childhood to ensure my eyes remain stable. I would argue during my teenage years I used technology the most intensively, with no side effects. The pressure symptoms started within 18 months of buying my first smartphone. I won't tell a lie, I used it A LOT. Rather than using my PC I would lie back with my smartphone for hours, sometimes spend a whole day on the new device (so 6+ hours of smartphone use) which substituted my PC for Youtube, music, Surfing the web etc.
I am starting to fathom the possibility that there is a correlation between the onset of my high interocular pressure and extended use of a smartphone. Length of use that on a PC was completely normal, and certainly within the realms of a 9-5 office worker.
Fast forward to today, and I can't use MacOS, I can't use Linux - within minutes I feel bags under the eyes and after 20 minutes feel dizzy/nauseous. I can't use drivers above 2012 and after having tried over a dozen difference devices over the last 5 years, struggle to find anything that doesn't cause instant discomfort.
If I use my iPhone 6S right now, for even just 1 hour/2 hours, I start to get flashes of color in my eyes, and on some occasions have symptoms similar to the start of the pressure episodes mentioned previously (veins in vision). This ONLY happens when i'm using the iPhone - and when checking in a mirror, my pupils are dilated. The technology is making my pupils dilate and therefore may be slightly narrowing the channels inside the eye. This could very quickly be proven under scientific evaluation that negative health effects are, and possibly have been caused by the latest technology.