Doing a good job of eye care and trying to stay away from eye diseases is crucial to our quality of life. Therefore, some common eye knowledge for middle-aged and old people is essential. Today we bring you some FAQs about presbyopia.
People in middle age, can not read the small print on the manual, most people know they have presbyopia, if you do not realize that the cell phone screen brighten up in order to read, but also a sign of presbyopia.
So what exactly is presbyopia?
Presbyopia is a physiological phenomenon, is with age, physiological regulation is weakened, the eyes ciliary muscle regulation function declines, there will be to look at things farther away, the eyesight is prone to heavy shadow or serial, eye soreness and a series of symptoms of old vision.
Why does presbyopia occur?
The lens is an important part of the eye, and the elasticity of the lens decreases gradually from birth. When young, the lens is soft and flexible, and can adjust its thickness well when looking at near objects, thus increasing the refractive power to see clearly. Through the adjustment of the lens, we can easily see both near and far objects.
But after the age of 40 the lens hardens and this reduces the ability to adjust. When reading small print in the newspaper, you have to hold it farther away to see it clearly, and this is suffering from presbyopia, which occurs in most people between the ages of 40---50.
Symptoms of presbyopia
1) When reading the newspaper, you have to hold it farther away to see it clearly.
②Pharmaceutical bottles and instructions and other small words are hard to read.
③Eye fatigue after close reading.
④Nearsighted people can only see clearly when they take off their glasses when looking at close objects.
Can presbyopia be prevented? Can it be treated?
Because presbyopia is a symptom of physiological aging, the same as "gray hair", "wrinkles" is the same reason, so far there is no medicine, food and other preventive methods.
The most important and the easiest and safest treatment is to wear proper glasses.
I have heard that myopia can be offset by presbyopia, so people who are nearsighted when they are young won't get presbyopia when they are old, right?
This statement is wrong. Because as we age, the lenses of both nearsighted and farsighted people age and develop presbyopia, it's just that nearsighted people wear their presbyopes later, or can read books and newspapers without them.
For example, if you have 200 degrees of myopia and now have 50 degrees of presbyopia, you can wear 50 degrees of myopia when you read a book or newspaper, and you can actually see it when you take off your glasses. You have both myopia and presbyopia at the same time, but it just gives the illusion that you are not presbyopic if you don't wear presbyopia.
Is presbyopia the same thing as hyperopia?
Some people think that presbyopia and hyperopia are the same thing when they see that both presbyopia and hyperopia are convex lenses, but in fact there is an essential difference between them.
Far-sightedness refers to the condition in which parallel rays of light enter the eye and form a focal point behind the retina under the state of relaxed accommodation. People who are farsighted can't see clearly whether they look far or near without adjustment, especially when they look close.
Presbyopia, on the other hand, is an abnormality of adjustment caused by the aging of the lens, which is not affected when looking at distant objects.
Do people who are farsighted have more presbyopia?
Yes, people who are farsighted not only get more presbyopia, they also get it at an earlier age than the general population. Some people at the age of thirty-five, six years old to see the near object is not clear, easy to fatigue the eyes, headache and other symptoms, this time to go to the optometry in a timely manner, with a pair of glasses to see the near with the glasses.