Fujiwara Eyeglasses
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The reason why it is difficult to focus at hand
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.
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 .
* 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.
measures
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.
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.
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.
How the assist lens works
Bifocal lens mechanism
Disadvantages of assist lenses and bifocals
◆ The edge of the field of view looks blurred
◆ Feel the fluctuation and distortion of the field of vision
◆ I'm afraid to go down the stairs
◆ I don't know which part of the lens to look at
There are various disadvantages such as.
In particular, the disadvantages of bifocals that support a wide range of powers are more pronounced than with assist lenses.
Also , if you are using bifocals for the first time after you are old, it may be especially difficult to get used to.
Early measures are required to lead a comfortable visual life.
How to mitigate the disadvantages of bifocals
◆ Frequency to see far
◆ Frequency to see at hand
◆ Balance of left and right power
◆ Frame shape and preparation (fitting)
◆ Prism correction, which is the correction of eye position
◆ Lens design suitable for eyes and daily life
◆ Lens design grade
◆ Processing when putting the lens in the frame
The disadvantages of bifocals can be mitigated by appropriately adjusting and selecting such items.
For bifocals that are difficult to use and cannot be used, it is highly likely that one of the above is not appropriate.
* Depending on the living environment and age,
Reading, working on a computer ⇒ Reading glasses and glasses for a computer (bifocal glasses)
Everyday ⇒ Bifocals with modest power at hand
You may need to have more than one.
In order to realize a comfortable visual life, it is necessary to select glasses according to each living environment and eye condition.
