This is not a case, it can be said that it is still relatively common. First of all, you need to know about presbyopia. Presbyopia is a physiological aging phenomenon, which leads to reading difficulties recently due to the decline of age-related adjustment ability. With the increase of age, the lens gradually hardens, the elasticity decreases, and the ciliary muscle function gradually decreases, which leads to the gradual weakening of the eye's accommodation function, the near point moves backward, and the distance of the reading object is moved away, trying to make up for the reduction of the accommodation range. This phenomenon is called presbyopia. Most people will have "presbyopia" in their eyes when they are 40 to 45 years old. At first, they felt that the small handwriting was blurred, and they had to take the books and newspapers far away to see the handwriting on them. In fact, presbyopia is a normal phenomenon in human physiology and a signal that the body is beginning to age. With the increase of age, the lens of eyeball gradually becomes hard and thick, and the adjustment ability of eye muscles also decreases, which leads to the decrease of zoom ability. Therefore, when looking at a close-up object, because the image cannot be fully focused when projected on the retina, the close-up object will become blurred. Even if you pay attention to protecting your eyes, the degree of presbyopia will increase with age, generally increasing at a rate of 50 degrees every five years. According to the correspondence table between age and presbyopia, most people with good eye refraction, that is, people who are neither nearsighted nor farsighted, usually have presbyopia of 100 degrees at the age of 45, which increases to 200 degrees at the age of 55 and 250 to 300 degrees at the age of 60, and then presbyopia generally does not deepen.

Under normal circumstances, presbyopia generally appears around 45 to 50 years old. However, in recent years, it has been reported that some teenagers have presbyopia before 18 years old, which is called "less presbyopia" in ophthalmology and optometry. There are two main reasons for this situation. First, most of these people have mild "hyperopia" when they are young, generally around the positive degree of 150. After the age of 30, their eyesight grows at a rate of 25 positive degrees every two years, and their eye adjustment and compensation ability is generally within 150 degrees. Beyond this degree, it will be difficult to adjust and compensate, so these people will have presbyopia before they are 40 years old. The so-called "presbyopia in advance" is related to people's excessive use of eyes, lack of rest and sleep, and excessive mental stress. The severity of presbyopia symptoms is related to the original refractive state, and also has a great relationship with everyone's work nature and study habits. Young presbyopia people are mainly concentrated in white-collar workers and intellectuals. Due to the increasingly fierce social competition, their spirits are in a state of tension all day and their bodies are in a sub-health state. These people deal with computers in Otawa, staring at the computer screen for a long time. In addition, due to lack of sleep, their eyes can't get enough rest, which leads to overworked eyes and presbyopia "reporting" in advance.

Solution: According to what you said, your mother's refractive state belongs to mild myopia, and more than 200 degrees of glasses are enough for her to see far. Now we will start our optician project according to her eye needs.

1, do you want to drive? What is the driving speed? Driving requires a long-distance view. If necessary, put this pair of glasses in the car, specially for driving, and match it with a slightly lower degree of life. Let optometrists check fcc, which is more scientific. )

2. Do you need long-term close reading, including watching the computer? In fact, your mother's condition should not be very serious now, so this scheme can be adopted, but it can be adopted from the perspective of eye health care. In this case, I suggest that she put a pair of glasses with low degree in her bag, which is specially used to see near, so that she won't be tired after watching for a long time, which can not only solve the fuzzy problem, but also slow down the aging speed of her eyes. ) ps: Take good care of this pair of glasses specially designed for seeing close, and you may see far in a while.

3. It is relatively simple to rule out the possibility of presbyopia in advance, that is, the problem of glasses fitting. Obviously, the brightness of this picture of more than 200 degrees is too high, which causes your mother's artificial hyperopia. In addition, the adjustment ability of middle-aged people's eyes gradually declines, and long-term reading causes visual fatigue. This situation will be investigated by the current optometrist, and it must be investigated, because this situation can not be condoned, how important the eyes are! ! !

If you have any questions about presbyopia, please leave me a message, and I will reply to you as soon as possible ~ ~ ~ In addition, there are some articles about presbyopia in my space for reference. My graduation thesis is about presbyopia care.