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°It is not necessary to choose a refractive index.

The weight of the lens is not much lighter, the thickness is not much thinner, but it is much higher. In fact, the higher the refractive index, the higher the light transmittance.

It's even lower.

2. The softness and hardness of the nose pads affect the comfort more, and the indentation is mainly determined by the weight of the glasses, the shape design of the nose pads and the adjustment technology of the glasses. The main ingredient of soft nose pads is silica gel, which generally begins to turn yellow after photoaging in about 3 months. Hard nose pads will also turn yellow, just for a longer period of time.

3. The color of the coating can be "made", and it is not directly related to the light transmittance. The anti-fouling (oil) ability is different, but the difference is not as big as imagined.

First, there is no need, there is not much difference between the thickness of the two refractive indices of your power, and sometimes it is better to choose a small frame than to choose a high discount.

Child. Second, it is generally based on hard nose pads. Whether it is because of the poor position of the nose pads that there is indentation all year round, try to let him do more debugging in the optical store.

Third, green film is generally the most commonly used, and generally speaking, it has the best performance. There is no need to consider so much about the film layer, and the film layer is basically green film. If the reflection is less and the light transmission is high, the price is relatively high, and the general manufacturer is selling the film layer, and the technical content is here, but the refractive index depends on the material, but everyone is about the same.

If you have an economic foundation, of course it's good, thin, light, high refractive index, imaging ***, and few goldfish circles. It is thin and light if I choose a board frame. ,,If it is usually more casual, choose the plate frame,If it is more formal, choose metal, and be smart.

The green film is good, it can have an anti-fatigue effect, and at the same time, it is necessary to choose imported, and the light transmittance of a good lens is definitely better than that of domestic ones, and at the same time there is less reflection, and the reflection is mainly related to his film.

If you have glasses, it's best to go in person. Because it is related to your comfort in the future, like interpupillary distance, which cannot be replaced by others, everyone's interpupillary distance is different. In general, the school test only measures your naked eye vision, not your glasses.

Like or just say your naked eye vision, if you wear glasses, you still have to test your specific power, and everyone's adjustment power is different, you can't specifically say the naked eye vision or how many degrees you wear.

First of all, go to the optician

Find a receptionist in the store.

Wait for refraction. Determine the degree.

Choose the frame and lenses.

The glasses were successfully paid.

Hello pro, happy to answer your questions, according to your questions, for you to find the following answers for your reference dear. First, measure the visual acuity of the naked eye. Block one eye and measure the vision of the other. I'll change it over in a while and check the eyesight of this glass.

Second, fill in the optometry form. It includes the degree of myopia or farsightedness in the left and right eyes, and the interpupillary distance between the two eyes. If there is astigmatism, there should also be astigmatism power and astigmatism axis.

Third, according to your professional requirements, the optometrist will give you prescription glasses. For example, your age, what you do with glasses, if you look at the blackboard, you have to have a slightly higher prescription. If you live normally, adults can match the degree.

Third, choose a frame. Choose the right frame for your face shape, and you can ask the salesperson to recommend you, or you can choose it yourself.

Fifth, choose the thickness of the lens. The refractive index is selected within 300 degrees, and the refractive index is selected from 300 to 500 degrees. In general, the higher the refractive index, the thinner the lens.

Sixth, walk around wearing glasses to see if you are dizzy, and the optometrist will match you to find the most suitable prescription. If you don't faint, it's settled.

7. Wait patiently for glasses to be fitted, about an hour. After putting it on, you can adjust the nose pads, the hooks of the glasses, etc. If it fits, the glasses are fitted and you're good to go.

The higher the power. The longer the adaptation time. This can only be adapted naturally, and it is worth getting used to it at the right time.

Eye Care Season "Do you know how long the adaptation period of new glasses is".

The first time you wear glasses, you should distinguish between true and false myopia.

Many teenagers' myopia is due to excessive pseudomyopia, pseudomyopia vision recovery is a high probability of feasibility, general hospital ophthalmic examination, will use mydriatic drops to dilate the pupils, to be paralyzed after the cycloplegia for examination refraction, if there is no myopia, at the same time after the dilated vision significantly improved or returned to normal, indicating that it is only pseudomyopia. If there is corresponding myopia after mydriatic paralysis ciliary muscle refraction, and the visual acuity does not improve after mydriasis, this is true myopia.

The data that needs to be referred to for glasses are:

If you want to do a comprehensive eye examination, you may have the following subjects: intraocular pressure detection, tear duct irrigation, tear secretion, comprehensive optometry, ocular ultrasound, ophthalmoscopy, if abnormalities are found, further fundus photography, ocular CT, visual field examination, OCT, VEP, etc.

In general, if there are no special requirements, you need unaided visual acuity data of the left and right eyes, myopia or astigmatism data, correction example data, interpupillary distance between the eyes, wheelbase, etc. Based on these data, your doctor may recommend that the actual lens prescription be slightly higher to protect your eyesight.

Lens frame selection.

Basically, the glasses testing standards of domestic glasses companies mainly include lens surface quality, lens top power, optical center and prism, lens diameter, film wear resistance, corrosion resistance, impact resistance, lens strength, flame retardancy, high temperature performance, etc., lack of weather resistance and biosafety indicators (such as nickel precipitation, anti-blue light) testing, these not only look at the brand, but also see the quality description. As for the choice of spectacle frames, lightweight, strong, and environmentally friendly materials are the mainstay, and the appearance aesthetic depends on personal preference.

A detailed examination is done during optometry.

Before optometry, the optician should first tell the doctor or optometrist whether he or she has a history of optometry, age, the nature of the work and the habits of using his eyes. This is because the entire optometry process is a process in which the optician works closely with the physician or optometrist. The eye is the most sensitive organ in the human body, and vision is one of the most complex refractive systems, and the lens is used to regulate tension or spasms when the eye produces a state of tension.

Therefore, the accurate judgment of the physician or optometrist and the cooperation of the optician are required for optometry. 2/5

Interpupillary distance and pupil height are the most important parts of glasses. As we all know, the most important thing when dispensing glasses is to measure the interpupillary distance. Because the preparation of a qualified pair of glasses is closely related to the interpupillary distance, and the selection of the frame is determined according to the interpupillary distance.

According to many years of clinical practice, the interpupillary distance should be measured in the optometry room before the frame is selected, so that the eye will match the interpupillary distance. 3/5

Select the frame. We all know the importance and significance of a pair of glasses to us, so we must be careful when choosing. The shape of the glasses frame is very important, we must learn to match the glasses according to our face shape, do not follow the trend, only the right one is the best. In principle, square and rectangular faces are suitable for oval or rectangular frames with a certain curvature; A round face fits any shape frame other than a round one; Oval and melon seed faces are generally suitable for arbitrary shape frames.

Frame size is also important, and only those that fit your size are more comfortable. The larger the frame, the heavier the weight, and the higher the requirements for the refractive index of the lens; Those with nose pads are more firm to wear, and those without nose pads are suitable for people with a straight nose bridge, and there is no need to worry about the nose pads turning yellow4 5

Select spectacle lenses.

Whether these glasses are suitable for you depends on the thickness of the spectacle lenses. The thickness of the lens is directly related to the refractive index of the lens chosen. The higher the refractive index at the same power, the thinner the lens.

Generally, we recommend that the refractive index can be selected within 300 degrees; 300-500 degrees selectable refractive index; 500-800 degree selectable refractive index; Above 800 degrees, 171, refractive index can be selected. 5/5

Pay attention to the phenomenon after wearing.

After the glasses are ready, the wearer who goes to take the glasses and adjusts the glasses for the first time will be a little unaccustomed at first, and it will gradually get used to it after three to five days, which is very normal.

How to get glasses for the first time for students? Students should go to a regular optical store for the first time to get glasses, where a professional will test your eyes before fitting the right glasses.

Children under the age of 12 must determine whether there is pseudomyopia for the first time with glasses, and there are two ways to distinguish between true and false myopia, one is dilated pupils (fast dispersion 6-8 hours to see unclear, fear of light, slow dispersion requires more than 20 days of pupil recovery), the second is foggy vision method (convenient and fast), and then the regular refraction confirmation power, glasses give priority to prevention and control lenses, at least the myopia degree increases slowly;

Don't worry, go to a regular professional store and the teacher will give you good advice!

It is more difficult to adapt to astigmatism, and the brightness of the new lenses is relatively high, and it will be uncomfortable to wear it just now. After you are sure that there are no problems with your test results, you will still need to wear glasses to adjust to the new glasses.

For your question, the first one, will not cause any harm to your eyes, just that it will be uncomfortable for the first few days.

Second, since you have a lot of astigmatism, why do you want to have a low astigmatism? Although it will be more comfortable to wear at first, it will not be the same as your result in the end.

Thirdly, it is logically okay for you to do this, but it is difficult for you to adapt to it, and it is better not to.

Fourth, I usually wear glasses all the time, and it will be better if I wear them for about a week, and if I still feel uncomfortable after a week, I will have to go to the hospital for a follow-up.

1) About the problem of halo: the new glasses will be caused by factors such as the shape of the frame, the refractive index of the lens, the change of the prescription, and the brighter new lenses, so it is recommended that you wear them for 7-14 days.

2) Determine the optometry sheet: Determine whether the optometry slip is a handwritten optometry sheet.

Hello! The single value of machine refraction is generally high, and can only be used as a reference value for optometry glasses. Optometrists will generally perform a walking try-on (insert try-on frame) based on the machine-typed optometry sheet data, and then obtain an accurate optometry data and issue a final handwritten optometry sheet.

3) If the degree of myopia is not high, you don't need glasses to read books at close range, and if you don't need to squint when you look at the blackboard with your current glasses, you don't need to change your glasses.