How to tell pseudomyopia and true myopia .

Both true and pseudomyopia manifest as decreased distance vision and good near vision. Pseudomyopia is functional, more common in adolescents, and vision can be reduced within a few weeks or 1 or 2 months, and can be restored to some extent with appropriate rest. True nearsightedness is an organic change that cannot be recovered spontaneously.

There are three methods of differential diagnosis:

1) Ciliary muscle paralysis method: It is to relax and adjust the ciliary muscle with cycloplegic drugs, so that the eyes are in a static refractive state, and then check the visual acuity and refraction to determine. with 1% atropine eye drops, 1 2 times a day for 3 to 4 days; or 2% postmatropine or tropineamide every 5 to 15 minutes for a total of 6 times.

If the visual acuity remains unchanged after dilation, it is true myopia, and the visual acuity increases to pseudomyopia. Refraction with myopia is true, and no myopia is false. This is recognized as the most reliable method for differential diagnosis.

2) Cloud and fog method: let the patient wear + spherical lens with both eyes at the same time, see distant objects for 3 minutes, and then remove the right lens, and immediately check the naked eye vision, the vision progress is false, and the non-progress is true; The left eye is then examined in the same way. This method is not very exact.

3) Dynamic imaging method: do not need to dilate pupils, first check the distance and near naked eye vision of both eyes. Poor distance visual acuity, normal near visual acuity, and no other eye diseases that affect visual acuity are differentiated.

The doctor and the patient sit facing each other in the darkroom. The patient wears an audition frame, and the left and right eyes are placed + spherical lenses. The patient's eyes are fixed on the optoscopic scope with both eyes at the same time (the No. 5 character or the word with few strokes such as large, small, upper and lower strokes is pasted on the side of the mirror, and illuminated with slit light next to the ophthalmoscope); 33cm distance isotope dynamic imaging.

Results: Those with reverse movements in all radial directions of the affected eye are true myopia. Each radial direction is forward or immobile, or one radial is forward and the other radial is orthopedic or farsighted.

Because of its manifestation of myopia, it is pseudomyopia; One radial direction is inverse, and the other radial direction is forward or immobile is mixed astigmatism.

The most direct method is dilated pupil examination, if the child's ability to cooperate is relatively good, and the age is about 10 years old, comprehensive refraction can also be carried out to determine true and false myopia according to the visual function of the eye.

I learned that these are two different eye diseases, both caused by not paying attention to the use of the eyes, unhygienic eye habits, and often wearing glasses.

If you understand the reasons and the differences, you will have different reactions, you will have different manifestations, and your eyes will change differently.

Pseudomyopia is functional myopia in which the axial length is normal, whereas true myopia is an organic lesion in which the axial length is usually longer. Pseudomyopia is the contraction of the annular ciliary muscle, the suspensory ligament of the crystal, the convexity of the lens due to its elasticity, and the increase in curvature enhances the refractive power and produces accommodative spasm; Pseudomyopia, such as blind glasses without accurate refraction or not, long-term ciliary muscle spasm, can also elongate the eye axis and develop into true myopia. Here's how to identify it:

1) Mydriatic method: pseudomyopia - after the use of atropine, the refractive power of myopia disappears, and it appears as emmetropia or hyperopia; True myopia - the degree by which the refractive power of myopia has not decreased or decreased after the use of atropine; 2) Cloud and fog method: let the patient wear a convex lens with a higher power and look at the eye chart 5 meters away, which can relax the ciliary muscle in a spasmodic state and eliminate the adjustment effect.

At first, the patient will feel blurred vision, after a few minutes, it will feel a little clearer, and then gradually reduce the power of the convex lens, if the visual acuity returns to normal or has a significant improvement compared with the pre-test visual acuity when decreasing to a flat lens without power, it proves that it is pseudomyopia.

What is pseudomyopia?

Pseudomyopia is functional, mainly due to excessive use of the eye, which causes the ciliary muscle to contract and spasm, the lens thickness increases, and the vision is blurred. Usually there is unstable vision, but after a period of rest, it will generally get better, but if it is not relieved in time, it may really form true myopia.

Medications, acupuncture, ear acupuncture and physiotherapy equipment, or through the patient's own eye muscle strengthening exercises can relax the muscles and relieve fatigueAble to restore vision to a normal state

How to distinguish between true and false myopia?

1. The most effective method is to do dilated pupil refraction, if you do not dilate pupil refraction, the power checked out is the "true + false" mixed data, which is not accurate. （Dilated refraction is not bad for children

Simple to tell

Hang an eye chart at a distance of 5 meters, do a vision test, and then wear 300-degree farsighted glasses or reading glasses, look into the distance, a cloud-like scene will slowly appear in front of you, take off your glasses after about 30 minutes, and then check your vision with an eye chart, if your vision is enhanced, it may be pseudomyopia, if your vision is still or your vision is reduced, there is a possibility of true myopia. This method is repeated once a day for three consecutive days, and if there is still no improvement in vision, it can be determined that true myopia is true.

Cloud method

It is not commonly used in general hospitals. When using the cloud method, the doctor will first ask the patient to wear + spherical glasses, see distant objects for 3 minutes, then remove the glasses, and then do a naked-eye vision test. Increased visual acuity is pseudomyopia, otherwise true myopia.

Ciliary paralysis method

The cycloplegic method is a more commonly used identification method in hospitals. First, use cycloplegic drugs to relax and adjust the ciliary muscles, so that the eye is in a static refractive state, and then do an eye examination and refraction. If the visual acuity does not change after mydriasis, it is true myopia, and if the visual acuity increases after mydriasis, it is pseudomyopia; If there is no myopia in refraction, the diopter is pseudomyopia, and if there is myopia, the diopter is true myopia.

What about pseudomyopia?

1. Look less at electronic products, don't rub your eyes with dirty hands, don't overuse your eyes, and let your eyes rest more. If you find an eye abnormality, you can see a doctor as soon as possible.

2. Drugs, acupuncture, ear acupuncture and physiotherapy equipment, or through the patient's own strengthening of eye muscle exercises can relax muscles, relieve fatigue, and restore vision to a normal state.

3. Distant view method: 1 2 hours after reading or reading and writing, overlooking the natural scenery, so that the ciliary muscle can adjust and relax, do eye exercises, and improve the learning and reading environment: pay attention to natural light and ensure sufficient indoor lighting when writing homework at night, more outdoor sports, and more distant scenery and green plants.

4. Eat more foods containing more zinc such as soybeans, almonds, seaweed, kelp, mutton, yellow croaker, milk powder, tea, meat, beef, and liver.

Wash and peel the carrots and squeeze them into juice, taking 200 ml a day, there will be improvement.

In the case of true myopia, it usually lasts for a long time, and you can't see clearly at the top of the eye chart when you look at it, but if it is pseudomyopia, your vision is still relatively clear at a certain time.

It should be decided based on the degree of clarity of the view, the optic nerve is damaged in true myopia, but the optic nerve is not damaged in pseudomyopia.

You can go directly to the hospital for examination and optometry, and you can determine whether it is true myopia or pseudomyopia.

What is the difference between pseudomyopia and true myopia? The most important thing is dilated refraction, if myopia still exists after dilated refraction, it is true myopia; If there is no prescription after dilated refraction, it is pseudomyopia. Some children use their eyes excessively when they are young, so that the ciliary muscle is in a spasmodic state, and there are manifestations of myopia, which can be slowly recovered after resting, which is pseudomyopia, which is reversible and can be recovered.

For true myopia, it cannot be recovered after rest, which requires glasses.

The determination of the truth or falsity of myopia requires scientific medical refraction to be finally obtained, and the focus on measuring the accurate refractive power is pupil dilation. If it is pseudomyopia, after the dilated pupils, the degree will no longer exist, if there is still a degree, then the degree measured after the dilated pupils is the child's real myopia degree.

You don't need to look at ophthalmology, teach you to understand the difference between true myopia and false myopia The lens in the eye will focus the image of distant objects on the retina, while myopia will cause the eye axis to become longer and the images converge in front of the retina, resulting in blurred vision. Among them, pseudomyopia is considered to be functional myopia. At this point, the shape of the eyeball does not change much.

As long as you start to pay attention to the habit of using your eyes, you can recover naturally after proper rest. True myopia is a qualitative change, at this time, the eyeball has been deformed, and it cannot only rely on its own adjustment to restore vision, but can only train the eyeball through external adjustment to restore vision.

The stability of vision is different, pseudomyopia, also known as accommodative myopia, is blurred myopia caused by excessive adjustment of lens refraction when people use the eyes for a long time. When the adjustment abnormality is over, the visual acuity will return to normal, so the vision of pseudomyopia is unstable. The real myopia is the adjustment of the lifting of the eyeball, and the refractive system of the human eye is in a static state, resulting in refractive error, so as long as you wear the right glasses, carry out the corresponding **, and usually maintain good habits with the eyes, the prescription will not rise.

In general, because most of the myopia in adolescents is caused by near proximity and eye fatigue, the myopia degree of pseudomyopia natural refraction (non-dilated pupils) is usually below 200 degrees. If the prescription is too high, it is likely to be really myopia. The phenomenon of false myopia is a sign of the occurrence of true myopia, and if we do not pay attention to eye hygiene and health care methods in time, it will soon develop into true myopia.

Only by understanding the difference between true myopia and false myopia can you take good care of the situation and protect your eyes. So how do you distinguish your false myopia?

It can be judged by the degree of myopia, by examples, and by the state of the eyes, so that true or false myopia can be judged.

You can go to the relevant place for examination, you can also go to check the intraocular pressure and the length of the eye axis, you can do an eye test, and you can also do a related dilated eye refraction examination.

If there is no prescription, this is false myopia, and a dilated eye refraction examination is required, and myopia can be determined according to this examination.

The main difference between "pseudomyopia" and "true myopia" is whether there is an increase in the eye axis and whether vision can be restored. The main difference between true myopia and pseudomyopia is the change of the eye axis, myopia refers to the focus of the eye in a state of adjustment at rest, that is, the place behind the refractive system formed by the parallel light passing through the eye is before the retina, and the image formed on the retina is a blurry virtual image, and the vision is reduced. The cause of myopia is not yet clear, the diameter of the anterior and posterior eyeballs is long, the eyeballs are slightly protruding, pseudomyopia generally has no axial changes, it is caused by ciliary muscle spasm, and after dilated pupils**, vision can be restored.

Pseudomyopia is common in children. When there is an object in the near distance, due to the adjustment intensity and duration of the use is too long, the ciliary muscle continues to contract, resulting in tension adjustment or adjustment convulsions, so that after reading and writing from a distance, it can not be quickly adjusted and relaxed, dizziness causes visual fatigue, eyeballs, vision loss, etc., at this time, due to the enhancement of the refractive power of the eye, the eye is in a myopic state, which is called pseudomyopia.

Pseudomyopia refers to the fact that the ciliary muscle is in a state of tension during close operation, and excessive tension leads to spasm of the ciliary muscle, which continues to maintain the regulating effect of tension even when looking at distant objects, which is more common in young students, and after the use of atropine accessory muscle, pseudomyopia will temporarily disappear. True myopia refers to the fact that in the case of loose eyeballs, the refractive ability of the refractive system is relatively strong, and the parallel light is focused in front of the retina and diverges on the retina to form a blurred circle. Objects close to the eye are divergent and cannot be focused on the retina, and the near is clear and the far is blurry when examined, which is true myopia.

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With the increasing application of electronic products, some junior primary school students wear glasses on the rise. Parents have heard of true myopia and pseudomyopia, and when the child is less than 12 years old and comes to optometry for the first time, the doctor will recommend chronic atropine dilated eye refraction, which can distinguish between true and false. If it is found that the child's myopia is gone, and the prescription is between 0-50 degrees, it is an emmetic eye, which means that the child's myopia is pseudomyopia, which can be relieved by dilating eye drops, and glasses are not required.

If the prescription still exists after dilated refraction, and exceeds 50 degrees, it is true myopia, which cannot be relieved by itself and needs to be solved by optometry.

Below the following is considered true myopia. It belongs to pseudomyopia between and pseudomyopia, which is prone to squinting, blinking, rubbing, and blurring of squint eyes.

The easiest way is to dilate the pupil refraction, if the child's vision becomes better after the dilated pupil, it is pseudomyopia.

If you still can't see clearly after dilating your pupils, you need to wear a pair of glasses with a prescription to see clearly, which is true myopia.