Photosensitive Epilepsy in Game And Video

The friends who play the game all know that the opening of some games will have some introduction and matters needing attention. Most players don’t take much more than a glance at these prompts, as they do when they unthinkingly check the “User Guidelines” box. Just like ghost doesn’t crawl out of the computer screen and eat you.It’s just a game. It’s not life-threatening.

user guidelines

Once upon a time, there were many TV viewers who had this idea, and they never knew that patients with a photosensitive disease would have severe epileptic reactions or even life-threatening seizures under certain conditions.It wasn’t until 1997 that a television accident in Japan completely renewed people’s understanding of the disease.

3D Dragon Event

On December 16, 1997, at around 6:30 p.m., the First Season of Pokemon , which began airing in the same year and has become hugely popular in Japan, was scheduled to air episode 38, “Computer Warrior 3D Dragon,” on Thursday.It was broadcast on more than 37 television stations in Japan and tuned into 4.6 million households. At the time, this figure reached the highest ratings of the broadcast time period.

3D dragon

However, when the video showed that the Pikachu destroyed the missile, some viewers began to have blurred vision, headache, dizziness and nausea, and some viewers even experienced severe symptoms such as epilepsy, blindness, convulsions and loss of consciousness.


A total of 685 viewers(most of them children),were reportedly taken to emergency services by ambulance across the country, with more than 150 children later hospitalized. Some viewers have even suffered seizures after watching reruns of news reports. A subsequent survey found that 5-10% of viewers reported experiencing minor discomfort but did not call a medical hotline or seek medical help.


Predisposing Factors

Now let’s take a look at the picture that causes photosensitive Epilepsy, and briefly analyze the characteristics of these pictures and the causes of epilepsy.(It may cause discomfort to some viewers,please watch carefully in a well-lit environment.)


We can see from the above picture, the picture has the following characteristics:First , there is a strong contrast between the alternating colors, and second, the flashing frequency is high, up to 12Hz (or 12 times per second).In addition, another important reason is that animation is broadcast in the alternating time between dawn and dusk, most families have not had time to turn on the light, resulting in indoor darkness, which strengthens the stimulation of the picture for human eyes.


Why to make this kind of like “crazy” flashing picture? In the early animation process, due to the immature technology, the production team would use two quick alternating flashing frames to show the explosion of the picture effect. The plot of the Pokemon is set in a virtual computer world, so the team chose red and blue with a “Cyberpunk” style. By chance, the blinking, contrasting colors, and lack of light in the room all conspired to cause the accident.


Although scientists calculated that only one in 4,000 people could potentially have a severe epileptic reaction, given the large number of people who watched the episode at the time, the number of people who were seriously affected was no longer a small number.

The Result

After such a serious mass incident, Pokemon was taken off the air for five months, only to resume on April 16. Meanwhile, shares in Nintendo, the maker of the Pokemon series, fell 5 per cent the next mornin.(Nintendo later said grievously: our games are black and white, and never caused epilepsy, and we have nothing to do with).


Of course, Pokemon’s mistakes also caused the animation industry to attach importance to photosensitive epilepsy, and all the research began to be well-formed gradually from here. Japanese broadcasters have since issued a series of guidelines to prevent a recurrence of the phenomenon.


In addition, Japanese TV programs have taken the initiative to include screen warnings in programs aimed at young children, encouraging viewers to watch animations in well-lit rooms, stay away from the TV and sit down.

After all that trouble, Pokemon Go hasn’t been down for the count. The team learned a painful lesson from this oversight, and the replay of Pokemon became one of the most rigorously produced and safe animations in the world, continuing the Pokemon craze that has been going on for a quarter century.

Related Posts

How to connect iPhone to TV with HDMI

Sometimes, we want to share videos and pictures with friends, family, and even business associates on our mobile phones. Your screen phone may not be big enough or give a clear picture of the images you wish to share. The HDMI comes in handy in this case. What’s even more interesting is that you don’t

Read More »

What Does an HDMI Cable Look Like

HDMI simply means High Definition Multimedia Interface. It is the most commonly used HD signal for transferring high-definition audio and video from a source, such as a computer or TV cable box, to a computer monitor, projector, or TV. About 20 years ago, the goal of the HDMI initiative was to improve an existing connection.

Read More »

What is HDMI 2.1

Most people don’t pay enough attention to the cables connecting their Blu-ray player to the television, projector, or soundbar. In no distant time, those cables may not work as the HDMI 2.1 is becoming more widespread. This means technology brands will also use the new standard in manufacturing TV, game consoles, projectors, or media steamer

Read More »

4K And 8K, Is The Gap Huge?

1. The difference of resolution 4K and 8K refer to the size of the resolution, and the size of the resolution represents the number of pixels that can be carried in the picture. The larger the resolution, the more pixels there are, the more details of the object that can be expressed, and the more

Read More »

Cell Phone Fast Charging Depends on The Data Cable or Charging Head?

Charger is generally 5V1A can be charged normally, when the output is 5V2A or more are considered fast charging QC1.0, super fast charging support 5V3A, 9V2A, 12V1.5A or 5V4A power. The copper core inside the data line must support high current, which is the same as the difference between high-voltage wire and ordinary household wire,

Read More »

How To Connect A Soundbar To TV With HDMI

Soundbars are excellent for giving your gaming and TV time a whole new definition. They are designed with at least one HDMI connector for easy installation. Although, some include RCA ports, optical ports, and several other features. Obtaining the most incredible sound with the fewest wires connecting a Soundbar to a TV will undoubtedly be

Read More »
Scroll to Top