Comment réduire la fatigue oculaire lors de la télévision

How does watching TV affect your eyes?

Settling down on the sofa in front of your favourite TV show can be a great way to unwind, switch off from work, or spend time with your household. In the UK, we are a nation that loves watching TV. In fact, the average adult spends over three hours in front of the television every day.

When it comes to TV time, the mantra "everything in moderation" certainly applies. Watching TV involves sitting still, so it's important to move about regularly and get plenty of daily physical activity and exercise.

As we watch television, our body is at rest but our eyes are often working too hard. This doesn't cause permanent eyesight damage, but it can irritate your eyes and cause uncomfortable eye strain.

Can watching TV cause eye strain?

Eye strain is a temporary and very common eye problem that causes discomfort. It can happen when your eyes become tired from over-straining to see things clearly.

"Binge-watching television shows does, unfortunately, influence eye health. The light that emits from a television screen, and our constant staring, are the two main reasons for this," says Sujata Paul, optician and professional services clinical lead at Lenstore.

1. Squinting the TV is a small object that emits a lot of light. As it covers a small percentage of your overall view, your pupils (the black part of your eye) don't close as much as they should. You may find yourself squinting to counteract the screen glare and improve your focus. This makes your eye muscles work harder which contributes to eye strain.

2. Blinking: when you watch TV for prolonged periods, you blink less. Blinking spreads a moisturising film of tears over your eyes, blinking less can result in irritated, des yeux secs.

Whether it's spending long periods in front of the television, a computer, or an iPad, there are many screens in our daily lives that give off an intense light. Eye strain caused by digital media screens is often called digital eye strain or computer vision syndrome. We often sit closer to digital screens, which makes eye strain even more likely.

Does watching TV too close damage your eyes?

Eye strain, although a source of discomfort, is not the same as eye damage. Sitting too close to your TV makes eye strain more likely, but there is no proof that this will cause long-term vision problems.

However, your viewing distance may be causing you to squint more. According to Paul, the distance you should be from your TV screen relates to both the TV quality and screen size. "The general rule is to be five times the distance from the screen as the screen is wide. Closer viewing distances are recommended for higher-quality televisions."

Is watching too much TV bad for children’s eyes?

Although children tend to be less prone than adults to eye strain, long periods of TV screen time can cause symptoms. TV can't cause eye conditions but may aid diagnosis. If your child always sits close to the TV screen and other screens - and holds books close to their face - it may be worth booking a check-up with your optician.

It's important for children to take regular breaks from watching TV. Excess TV viewing in young people has been linked with obesity, behavioural issues, and problèmes de sommeil.

Is it eye strain or an eye condition?

Eye strain is common, but it should go away easily and shouldn’t impact your life: "If you’re regularly experiencing symptoms such as blurred vision, itchy eyes, headache, and eye fatigue during or immediately after watching your favourite shows, it's best to check with an optician just to rule out an eye condition," advises Paul.

It's not just the light from TV that causes eye strain. Certain colours on the far ends of the colour spectrum - like some reds, violet, and blue - are harder on your eyes because they have shorter wavelengths and are high energy. LED blue is also given off by computer screens and regularly flickers, causing your eyes to adapt constantly.

Colours in the middle of the spectrum - like orange, yellow, and greens - are easier for the eye to interpret. This said, bright yellows can also cause eye strain after long periods as they reflect more light.

Online contact lens retailer Lenstore analysed the colour palettes of popular TV series in the UK in 2022. Shows with lots of contrasting colours make your eye muscles constantly adapt and can easily cause eye strain.

Results ranked from the most eye-friendly (scored closer to 600) to the least (closer to 0) are as follows:

In reality, a clashing colour palette - although irritating to your eyes - is unlikely to deter you from watching your favourite TV series. Instead, Paul advises the following:

"To keep eye health in check, rather than binge-watching your favourite series, spread it out over several days, particularly if you're watching something with vibrant colours such as those highlighted in our study."

Remember, good general eye health always starts with drinking plenty of water (for hydration), following a healthy diet (for nutrients), and getting plenty of sleep (to rest your eyes and allow them to recover).