Is it possible to be both nearsighted and farsighted Difference Between Myopic and Farsighted

I don't think it's likely, because the principle of myopia and farsightedness is just the opposite.

Myopia is due to the increase in the curvature of the lens, or the long anterior and posterior diameter of the vitreous, resulting in too strong the ability to gather light, causing the image to fall in front of the retina, making the eye unable to see clearly; In the case of farsightedness, the curvature of the lens is too small, or the anterior and posterior diameter of the vitreous is reduced, resulting in too weak the ability to gather light, so that the image falls behind the retina, resulting in the inability to see objects.

Therefore, I think that theoretically it is impossible for the same eye to be both short-sighted and farsighted.

Probably, the world is full of wonders.

Eyes suffer from amblyopia, myopia, farsightedness, astigmatism at the same time, hehe, everyone has it.

If it is the same eye, only one can happen.

It may be farsighted at first and then myopic again.

Or first myopia, and later hyperopia.

Juvenile myopia, when you are old, it is not that you will not be myopia, but the degree of myopia will be reduced, because of presbyopia. Myopia and farsightedness are complementary So when you get older, these two will be neutralized, and the degree of myopia will be lower, and the reading of the presbyopia will be lower

It is possible for the eyes to be both nearsighted and farsighted, anterior-posterior rather than simultaneous!

I don't think this happens on the same eye, because the two cases are completely opposite and mutually exclusive.

This will not offset the fact that short-sightedness occurs when you are young and hyperopia develops as you age.

No, unless there is neuropathic injury or optic nerve atrophy. I consulted some old engineers, who used to be short-sighted, but gradually slowed down as they got older.

Damn, I'm one, nothing out of the ordinary. I'm left -170, right +175

Reason: Sleeping on the right side for a long time! Alas, ashamed!

But there's really nothing abnormal, it's just that it's hard to rely on one eye alone, and the two complement each other.

qui1016Don't look down on people like us.

Of course, it is impossible to have the same eye, but it is possible to have two eyes, one near and one far away.

One of my middle school teachers, one eye is nearsighted and the other eye is farsighted, hehe.

Unless the lens is deformed, the left side is asymmetrical with the right side.

Myopia: see clearly near and far; And the eye axis is long.

Farsightedness: not clear near and far away; The eye axis is short.

Both myopia and farsightedness are refractive errors that need to be corrected in time. Especially for children under the age of 18, who are still in the stage of vision development, once the refractive error is found, it should be prompted**. Refractive errors can be corrected and vision can be restored, otherwise it will stay with you for a lifetime.

Correction of refractive error should be followed:

1. Correct bad eye habits in a timely manner.

Once a child's vision is reduced, it is necessary to find out the main cause and correct the child's bad eye habits in time. Only by correcting bad habits in time can you stop the channel of continued vision loss. So, this is one of the very important factors.

Second, it is necessary to reasonably arrange the combination of work and rest, work and rest.

On the basis of correcting bad eye habits, we must reasonably arrange work and rest, and achieve a combination of work and rest. It is necessary to arrange work and rest reasonably, so as to combine work and rest to ensure that children have sufficient sleep time, and at the same time, it also prevents long-term eye use, which can prevent vision from continuing to deteriorate.

3. Participate in sports appropriately.

Proper participation in sports can increase the rate of blood circulation around the eyeball, which can improve the flexibility of the eye muscles. Especially when playing sports such as ball games, the line of sight will follow the movement of objects at different distances, which can prevent further deterioration of vision.

Fourth, pay attention to the diet and have a balanced nutrition.

Although the daily diet is mainly based on cereals, it is necessary to supplement vegetables and fruits, so as to achieve a reasonable distribution of protein, sugar and fat. Eat less sweets and more purple foods.

5. Timely supplement of vision nutrients to enhance the anti-fatigue ability of the eyes and improve vision.

This is the most important and fundamental thing. It is recommended to take Leyan Vision Nutrients, take it with warm water, and insist on taking it for a period of time, the child's refractive error will gradually be corrected, and the younger the age, the easier it is for the vision to recover.

Normal eye: When the eye is accommodating relaxation, the refracted focus of parallel light rays through the refractive system of the eye falls on the retina. It's what people call normal vision.

Myopia: In the state of accommodative relaxation of the eye, the focus of parallel light rays refracted through the refractive system of the eye falls in front of the retina. The patient's subjective perception of near objects is clear and distant objects are blurry.

Hyperopia: In the state of relaxation of the eye, parallel rays enter the eye and form a focal point behind the retina, and external objects cannot form a clear image in the retina. The patient's subjective perception is that the vision is blurry at the distance, and the vision is even more blurry at the near.

Many people think that farsightedness means seeing clearly from a distance, but this is wrong.

Changsha Qirisheng Eye and Vision Center.

The nearsighted eye sees the same as the normal eye, but the visual distance becomes shorter, and the distance cannot be seen clearly. Hyperopia is the opposite.

20 Most of them are short-sighted, seeing things far away, not very clear, a little blurry. Farsightedness, also known as presbyopia, is generally only available when you are old, and the more you look at things that are close, the more you see. What you see far away is very clear.

The myopic eye can't see clearly, the farsighted eye can't see clearly if it's too close, and the one who is too far can't see clearly, as if that's the case.

The myopic eye sees the distant things blurred, while the farsighted eye sees the near things blurred.

Theoretically, it definitely doesn't work!

People with such doubts may think that a person with a positive degree is farsighted, and a negative degree is short-sighted; Or they think that not being able to see clearly is farsightedness, and not seeing clearly is myopia; Or you can see near and far through glasses to tell if you are near or far!

According to the theory of refraction and optometry, myopia is when distant objects are imaged in front of the retina in the absence of adjustment. Hyperopia refers to the image of distant objects behind the retina in the absence of accommodation. From this, it can be judged that the two do not coexist!

Nowadays, many people mistakenly think of presbyopia as farsightedness, because both are manifested as difficulty in seeing near, like one person thinks this way (the near area of the elderly gradient lens is designed for presbyopia), but the two are not the same!

Presbyopia refers to the symptoms of difficulty in seeing near and decreased vision due to the stiffening and deterioration of elasticity of the lens in the case of aging, and the symptoms of difficulty in seeing near and vision decrease! Loss of distance vision is generally not occurring! High hyperopia can also cause a decrease in distance vision, and farsightedness is not directly related to age.

The details need to be distinguished!

For many people nowadays, many people think that a positive degree is farsightedness, and a negative degree is myopia, which is also not scientific! The reason is that there is no distinction between farsightedness and presbyopia, and a positive degree may also be presbyopia!

For gradient lenses, the upper visual distal area is corrected for refractive errors, such as myopia, farsightedness, astigmatism; The proximal zone below is used to correct presbyopia, and the proximity zone will have a positive power to compensate for the adjustment ability of the eye lens! This design is just so that a pair of glasses can meet the requirements of being able to see clearly at different visual distances! And not proof of myopia and hyperopia!

Hope my answer is useful to those who see it!

That's absolutely impossible, if you go online for more than seven or eight hours in a row, your vision will be blurred, and you will slowly recover your vision after not going online for a while. There is no such thing as the same problem of near and far. Hope.

Theoretically, it is possible that progressive multifocal glasses The upper light area looks far and the lower light area looks near, that is, the upper myopia and the lower eye are farsighted, but it depends on the specific power Not everyone is suitable for this kind of glasses, such as the difference in the power of both eyes, people with sensitive eyes, or people with high blood pressure, severe motion sickness, seasickness are not suitable for the specific situation, it is recommended to go to a professional optical store for consultation.

Nearsightedness and farsightedness can occur at the same time. I am one. I am a teacher and am now in my fifties.

At the age of 40, he began to develop myopia and farsightedness at the same time. When I was young, according to Guan Xue's theory, I thought that near and farsightedness could not be acquired at the same time, but in fact this was not the case. Now walking on the road, the other party's comer is the same as before, he can't see his face clearly, he only knows that someone is coming.

When I read a text to a student in class, the words in the textbook are very vague. Especially when I opened my phone, the words in my phone were too small to be able to see with glasses. When I took off my glasses, I could see the words clearly.

Nowadays, wearing glasses often requires wearing and taking them off, which is very troublesome.

Generally speaking, it will definitely not! Unless one eye is farsighted and the other eye is short-sighted!

But whether it is nearsightedness or farsightedness, you should pay attention to:

1. Pay attention to the time you spend with your eyes.

Children's eye development is not perfect, the ability to work is low, every time you read or write for an hour, you should let the child go to outdoor activities, do games, look into the distance, or observe the flowers and trees, so that the tense eye muscles are relaxed, eliminate fatigue. In addition, it is necessary to make the child's life regular, have enough sleep, and let the eyes get enough rest.

2. Pay attention to the light of your eyes.

Do not allow your child to read or write in dark light or sunlight. If a 25-watt light bulb is used indoors at night, the distance between the book and the bulb should be within 1 meter. If you use a 60-watt bulb on a stool, the distance between the book and the bulb should be 1 2 meters.

Cloudy days, dusk, weak light in the moonlight, and strong light in the sun are not suitable for reading and writing. When watching TV, it is necessary to maintain a suitable distance, which should generally be 5 7 times the diagonal length of the phosphor screen. The time to watch TV should not exceed 2 hours at a time.

3. Pay attention to eye exercise.

Physical exercise can enhance blood circulation and metabolism, supply more nutrients to the eyes, and enhance the resistance of the eyes, which is an indirect exercise for the eyes. The direct exercise is eye exercises, which is based on the massage, massage, acupuncture and acupuncture acupuncture points of Chinese medicine, combined with jujube Kuanhui medical sports, which is a scientific method to protect eyesight. Parents should learn the basic knowledge of eye exercises, give specific guidance and often urge their children to do eye exercises, and persevere.

4. Pay attention to eye nutrition.

In order to protect children's eyes, children can eat more carrots, animal liver, lean meat, to supplement vitamin A, or regularly supplement the comprehensive nutrition of the eyes with Leyan vision nutrients, and at the same time, it is also necessary to appropriately consume millet, tofu, animal liver and other supplements of vitamin B2, so as to avoid night blindness, corneal malacia, red eyes, dry itching and other symptoms. Eating too much sugar will harm your child's eyesight, so your child's sugar intake should be controlled.

5. Pay attention to regular inspections.

Regular check-ups are due to the fact that children's eye structure, binocular visual function, and intelligence are still in the process of continuous development after birth, and the content of the examination is different at different ages. The usual age of ophthalmologic examination is generally 2-7 days after birth, 42 days after birth, 3 months, 6 months, and 1 year of age, and then once a year. In this way, the problem can be detected early and corrected early, instead of waiting until the vision has deteriorated and there is a vision problem before going for a check-up.

The difference between hyperopia and myopia Hyperopia and myopia are two completely different concepts, myopia is defined as a parallel ray of light about 5 meters focused behind the eye, and its imaging point is in front of the retina, while hyperopia is 5 meters away after the light is focused by the eye, its imaging is behind the retina, it is completely different.

(Good Tomorrow Optometry) will provide you with professional answers.

Myopia is when the focal point of light falls before the position of the retina. It is usually due to:

1) The cornea is too focused.

2) The lens portion of the eye is too long for the cornea. If you don't wear glasses, contact glasses, or other vision correction and you can see more clearly when you're closer than you are at a distance, you may already be nearsighted.

Hyperopia is when the focal point of light falls behind the position of the retina. It is usually due to:

1) The focus of the cornea is too weak.

2) The lens portion of the eye is too short for the cornea.

NOTE: There will actually be no focus after the retinal position because the light has diverged or been absorbed by the surrounding tissue].

Generally speaking, no, there may be myopia in one eye and farsightedness in one eye; In addition, there may be myopia and presbyopia in the eyes, so this situation occurs, it is recommended to go to the hospital in time for accurate optometry to determine the vision of the eyes

1. The time of close eye use should not be too long, every 40-50 minutes, you should take a little rest for 3-5 minutes, and look into the distance to relieve visual fatigue.

2. Read and write, play with the computer, maintain a correct posture, the height of the table and chair should be appropriate, and the distance between the eyes and the reading materials should be about 33 cm.

3. Mix whole grains, meat and vegetables, eat more vegetables and fruits, and don't eat partially. Lack of vitamins in food is prone to night blindness and dry eye disease, and lack of trace elements chromium and calcium in food makes it easy to suffer from myopia. In addition, it is also necessary to pay attention to regular supplementation of eye vision nutrients, not from the nutrients required by the eyes, enhance the anti-fatigue ability of the eyes, and better protect the eyesight.

Fourth, when reading and writing, the light should be moderate, not too strong or too dark, and the light should come from the left front, so as not to obstruct the vision of the hand shadow. The light should be soft, if it is incandescent, it should be between 25 and 40W, and it is not recommended to read in the sun. Because the intensity of light has a direct impact on pupil dilation, too strong light will increase the intensity of eye accommodation, aggravate the intensity of eye labor, and it is easy to cause myopia after a long time.

Generally, desktop lamps should be less than 40 watts.

5. Avoid reading while walking or reading in a walking car. Because the carriage is shaking, the body is shaking, and the distance between the eyes and the book cannot be fixed, the burden on the glasses will increase. Often, this is likely to lead to myopia.

6. Actively participate in physical exercise to enhance physical fitness. As the eyeball follows the target, the ciliary muscles continue to relax and contract, and the synergistic effect of the extraocular muscles can increase the blood perfusion of the eye, promote the metabolism of the eye, and thus reduce eye fatigue. Moreover, the quality of physical fitness is also closely related to the occurrence of myopia in children.

Malnourished and weak children are prone to myopia.

7. Insist on doing proper eye exercises. By massaging the acupuncture points around the eyes to enhance the blood circulation of the eye socket, improve neuronutrition, eliminate the excessive congestion in the eye, and achieve the purpose of relieving eye fatigue, it is conducive to the prevention and treatment of pseudomyopia in adolescents, and is a good way for adolescents to self-care their eyes.

8. Eat less candy and high-sugar foods. Too much sugar will produce a large amount of acidic substances in the blood, and the acid will combine with the salt in the body, especially calcium, resulting in a decrease in blood calcium, which will affect the toughness of the eye wall, make the eye axis easy to elongate, and promote the occurrence and development of myopia.