If you lie down and look at your smartphone, it will be damaged!The measures that can be done right now, such as the angle and time of looking at the screen

If you look at your smartphone (hereinafter, smartphone) for a long time, your eyes will be tired and difficult to see.Nevertheless, in the era of many contacts on smartphones, we can't help but use smartphones.I want to get together with my smartphone without burdening my eyes.In his book, "50 Habits that Lost Eyesight that only the ophthalmologists know," (SB New Book), the ophthalmologists, Hiramatsu, who explain the habit of valuing their eyes and simple training.I did it.

The light coming out of the smartphone is burdensome!It is NG to see at a long distance for a long time

First, let's understand why smartphones damage their eyes.

"The reason is mainly two reasons. Light and the length of time to watch. We have few opportunities to see what emits light like the sun and room lighting. However, the smartphone screen is the screen of the smartphone.As with tablets and personal computers, I look directly at a very strong light called blue light. Of course, the eyes are made to withstand a certain amount of light, but light.If the stimulus is excessive, it will be damaged.

Above all, unlike TVs and personal computers, many people will see them at short distances within 30cm from their faces.If you look at it while commuting or before you go to bed at night, you will eventually expose the light stimulus for a long time. "

If you read on the bed, use a terminal or paper book for e -books instead of your smartphone.

Furthermore, when you look at your smartphone in the dark, such as when bedtime, you can see this kind of harm.

"In the dark place, the pupils of the eyes open. We are looking at the light in the eyes. Opening the pupils in the dark is trying to incorporate as much light as possible to see things.From. So, if you are illuminated by the strong blue light in light, you will see a lot of light than when you look at your smartphone in a bright place during the day, which will take severe damage.

In addition, "darkness" is required to be secreted by melatonin, a sleeping hormone.Nevertheless, if the strong light of the smartphone is stimulated, melatonin is not secreted enough, the sleep is poor, and the quality of sleep deteriorates.As a result, the eye fatigue that should be healed during sleep will be carried over to the next day. "

Differences in e -book devices and smartphone light emission

If you are reading a book on a bed on a bed, switch to a paper book, or if it is difficult, use a dedicated device such as "Kindl Paperwhite".

"The direction of the e -book -only device and the smartphone are completely different in the direction of emitting light. While smartphones and tablets emit light toward viewers, e -book -only devices are paper books at night.Like when you are looking at, it emits light towards the displayed characters. Since it does not look directly at light, the burden on the eyes is reduced compared to smartphones. "

Reduce the brightness of the screen and see the smartphone in the correct posture

In addition, the burden on the eyes changes greatly just by devising it.One is to adjust the brightness of the smartphone screen.

"The brightness may be the maximum in the initial setting, so it is better to fix it to the brightness that is slightly lower than the middle level or the middle level. Inside, the screen will automatically darken at night.There are some models that can be set to suppress blue light. "

Then, keep a distance of 30cm or more from your eyes and try to leave.If you have a chance, you may want to choose a smartphone on a larger screen if you have the opportunity.

If you look at it in a lying state, it will be a burden on your eyes

The angle of seeing the smartphone is also important.When you fall asleep, it is easy to get a good eye on it, but this is also a burden on your eyes.

"If you look at the upper eyes, you will have twice as much as you look at the lower eye. In short, the upper eye is twice as long as the lower eye, and the eyes are easier to dry."

Be aware of the time.If you are watching videos such as movies on your smartphone, if you look at your smartphone continuously, it is about 60 minutes.

"If you watch a feature film for 2 hours or 3 hours, take a break from your smartphone once after about 60 minutes and look far away."

The above precautions can be said to heavy users on tablets and PCs.To protect your eyes from powerful light damage, you do not look at the digital device more than necessary.In particular, when you enter the bed, you decide that you will not see your smartphone.This is the biggest precautionary measure you can do today.

◆ I told you: Ophthalmologist, Hiramatsu

Doctor, Medical Doctor, Showa University also lecturer.Currently, the crisp comments that can be understood without specialized knowledge of the Deputy Director at Nimatsu Matsurena Hospital are popular, and have appeared in many media.The YouTube "Ophthalmology Hiramatsu Channel", which distributes his health information for free, has gained high support for more than 70,000 registrants.http: // www.Nihonmatsu.net

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