How to test for myopia? How do you know if you re nearsighted?

Myopia is mainly manifested as blurred vision and clear near vision, which can be tested by self-testing, and through the visual target 5 meters away, the patient can clearly see distant objects, then the vision is basically normal. If the patient cannot see the small print clearly at a slightly distant distance, but the near objects are very clear, then myopia may be developed and need to be examined by a professional ophthalmologist.

If you want to know if you are nearsighted, first observe whether you can see clearly from a distance, such as the person walking across from you can't see clearly, or watch TV, the person on TV can't see clearly, but there is no problem with seeing close, such as reading a book or looking at a mobile phone. In this case, it is necessary to go to the ophthalmology department of the hospital for computerized optometry to preliminarily determine whether there is myopia. If you want to get an accurate myopia degree, patients over 18 years old can get accurate myopia through computerized refraction, but patients under 18 years old need to have dilated eye refraction.

Patients over 10 years old and under 18 years old can obtain myopia degree by dilating their pupils with rapid mydriatic agents and tropineamide, and patients under 10 years old with eye alignment abnormalities, that is, strabismus, must use atropine cream or atropine gel and other chronic mydriatic agents to dilate their pupils to obtain accurate myopia degree.

Myopia is a common ophthalmic disease, and the main manifestation is blurred vision, especially the distant things are not clear, and the near places are relatively clear. If you have the above symptoms, you should have a high suspicion that it is caused by myopia, and you can go to the ophthalmology department of the hospital or a regular optical store for an optometry examination to know the exact degree of myopia. If the prescription is relatively high, glasses should be worn to improve corrected vision.

It's very simple, at the same distance, people who are not myopic can see clearly, and people who are nearsighted can see blurry or see people's faces blurry from a distance, and they are probably myopia.

You can go to a shop with glasses. I'll give you a free test of how many degrees your glasses are.

3. In the state of accommodative relaxation, parallel light rays are refracted by the refractive system of the eye and converge in front of the retina. Among them, axial myopia is more than -6d is called high myopia, and those with various degenerative and degenerative changes in the fundus of high myopia are called pathological myopia, and the axial elongation and thinning of the eyeball wall, especially the posterior sclera, are the basis for axial myopia to develop into high myopia.

Check the eye chart first to see if the visual acuity is reached, it is normal to reach the specific examination in optometry.

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There are several symptoms of myopia, and if you notice symptoms such as blurred vision in the distance and squinting when looking at things, you may be nearsighted.

Manifestations of myopia:

1. Squint. When distant targets cannot be seen clearly, squinting is often used to compensate, because the eyelids can block part of the pupil when squinting, reducing diffuse light and reducing the impact of astigmatism, thereby temporarily increasing and improving visual acuity.

2. Blink. Frequent blinking can be programmed to alleviate myopia and increase visual clarity. Many people will see things more clearly when they are in tears.

3. Tilt your head. It often happens that tilting the head to watch TV, also because when tilting the head, it can reduce the interference and influence of some diffuse light, and some children will even develop the habit of tilting their head.

4. Error. The target in the distance is not clear, and I don't say hello when I see acquaintances. I make mistakes during exams, I can trip over or hurt myself when I move in the dark, and some of them have a decline in academic performance, and I often have to borrow other people's notes to copy, etc.

The main manifestation of myopia is that it is clear when looking at near distance, and it is clearer to see small characters, but it will be blurry when looking at a distance, and the cause of myopia should be considered first. It should be judged according to the age of the patient, and if it is an adult with this condition, it is enough to go to the hospital for a simple computerized optometry. If it is a child less than 12 years old, after doing computerized refraction, you need to do dilated eye refraction, and use compound tropicamide eye drops to dilate the pupils to see whether the child is true myopia or pseudomyopia.

Patients with myopia should pay attention to looking less at mobile phones and computers, reduce the time and frequency of near eye use, and use their eyes at close range for about 30 minutes to see and rest. Usually pay attention not to stay up late at night and strengthen outdoor activities. Myopia is mainly glasses, and patients over the age of 18 can consider laser surgery for myopia if they need to take off the lenses.

Some patients will choose liquid orthokeratology lenses, which depends on the patient's age, and the final choice is made according to the condition and the degree of myopia.

1. Simple distinction. An eye chart can be used for an eye test, followed by wearing 300-degree teleopia glasses to observe distance. After about 30 minutes, remove your glasses and check them with an eye chart. If vision is enhanced, it may be pseudomyopia.

2. Ciliary muscle paralysis method. The cycloplegic method is the most commonly used in hospitals. Doctors usually use drugs to relax the ciliary muscles and then put the eyes in a static refractive state, followed by a vision test.

3. Cloud and fog method. When checking visual acuity with the cloud method, the doctor usually places the patient on the + spherical mirror, removes the glasses after 3 minutes, and then performs an eye test. If the increase in visual acuity is pseudomyopia, otherwise it is true myopia.

How to simply judge whether it is true myopia or pseudomyopia at home, because there are many *** dilated pupils, which are particularly bad for the eyes.

True myopia is caused by the elongation of the eye axis, and the parallel light emitted by objects at infinity is refracted by the refractive system of the eye, and cannot be imaged on the retina, but before the retina, resulting in blurred vision. Pseudomyopia is blurred vision caused by excessive eye use or malnutrition that causes the ciliary muscles to contract and spasm continuously, resulting in thickening of the lens. To measure true myopia and pseudomyopia is actually very simple, you can do an optometric examination under the small pupil before refraction, and record the corresponding value, and then perform a dilated mydriatic refraction examination, the myopia degree measured after the dilation of the pupil is true myopia, subtract the value of true myopia from the previously measured value, and the result obtained is pseudomyopia.