The reason why it is difficult to focus at hand

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Although there are individual differences, it becomes difficult for anyone around the age of 40 to focus at hand when the subject is in focus in the distance.

This is because it is a state of "presbyopia" , which is a decrease in the ability to adjust focus .

"Presbyopia" does not heal and progresses with age, and the difference between the power to see far and the power to see near increases.

Especially for those who do a lot of computer work and paperwork, the symptoms will be noticeable.

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If you put up with presbyopia or leave it unattended, you may experience symptoms such as stiff shoulders, headache, loss of appetite, nausea, and heavy eyes and head .
Also, if you continue to use reading glasses that are not suitable for you, it will cause eyestrain and accelerate the progression of presbyopia .

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* If a person over the age of 45 can clearly see a close distance with the naked eye, it is possible that both or one of the left and right eyes is myopia .

In the case of myopia, it is out of focus in the distance with the naked eye.

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① Wear reading glasses

The characters will be easier to read if you wear glasses that are in focus nearby.

However, the glasses do not look clear in the distance, so the glasses are often put on and taken off.

Also, ready-made reading glasses that can be purchased without measuring the power

・ The power of the left and right eyes is different

・ There is astigmatism

・ The distance between the left and right pupils is different from the ready-made values.

In such cases, symptoms such as tired eyes, stiff shoulders, and headache may occur, which may accelerate the progression of presbyopia.

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② Wear glasses that match the middle distance

By focusing in the middle, you can see the image in the distance and near.

​ In the case of glasses for myopia, the power will be weaker .

You don't have to put it on and take it off, but you can't see it clearly in the distance or near.

​ If presbyopia is not progressing, this method may help.

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③ Wear assist lenses or bifocals

Assist lenses and bifocal lenses have multiple powers in one spectacle lens .

In other words , you can focus on multiple distances from far to near with one pair of glasses.

However, assist lenses and bifocals also have their disadvantages.