今話題の視力の悩み…スマホ老眼

Eyesight problems are a hot topic right now…smartphone presbyopia

Smartphone presbyopia that cannot be adjusted smoothly

Smartphone users now account for over 60% of the Japanese population.

Under these circumstances, an increasing number of people in their 20s and 30s are suffering from presbyopia-like symptoms, such as "difficulty reading letters at hand" and "blurred vision due to difficulty in focusing on nearby objects." It is considered to be related to smartphones, etc., and is called "smartphone presbyopia."

"When I suddenly look at a magazine or watch on the train, the letters are blurry and I frown."
is Kazuhiko Yamane in his 30s who commute by train. These symptoms usually occur in the evening. In addition to using a computer at work, he seems to be devoted to checking emails and collecting information on his smartphone when he goes out for business. Even after work, I can't let go of my smartphone. Many young people like Mr. Yamane spend all day looking at their smartphones.

The inability to focus on near objects is like presbyopia. Although presbyopia was thought to be something that only people get older, more and more people in their 20s and 30s are suffering from the early symptoms of presbyopia. There is no particular abnormality in vision, but it is characterized by the inability to adjust the focus smoothly.

Although it is temporary, there are cases where it becomes more severe over time.

When looking at near objects, the ciliary body muscle works to change the thickness of the crystalline lens, which acts as a lens. Presbyopia is a phenomenon in which the crystalline lens hardens and the ciliary body weakens with age, making it impossible to adjust focus. Symptoms start appearing around the age of 40.

On the other hand, smartphone presbyopia is a symptom medically called “accommodative strain”. As a result of continuing to look close, the muscles become stiff and it becomes impossible to adjust the focus. It is not presbyopia and is mostly temporary. In severe cases, the focus may remain fixed.

The same symptoms occur on a computer, but on a smartphone, it is more likely to occur because you stare at the characters on the small screen from a short distance.

In addition to smartphones, the modern world is full of devices that are used close to the eyes, such as computers, tablets, and game consoles. Old and young men and women stare at each other for a long time. For the eyes, it is a harsh society that they have never experienced before.

For that reason, there are cases where it not only affects the eyes, but also loses the balance of the mind and body, and leads to a decrease in work and learning efficiency. Of particular concern is the impact on children. It is necessary to refrain from using it for a long time and to be concerned about eye care.

As a countermeasure,

  • Keep a distance of at least 40 cm between your eyes and your smartphone.
  • Take a break for 10 to 15 minutes after using your computer or smartphone for an hour and look at the scenery in the distance.
  • Massaging your eyes or using a steamed towel to increase blood circulation in your eyes can also help relieve fatigue.
  • Blink when you wake up (when you're staring at your smartphone, the number of blinks is surprisingly low).


Take measures before it becomes serious like this!

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