How to tell if a pair of reading glasses has the same power, explain the method and reason

First, you have to explain that you bought reading glasses by **.

Second, according to my research, the reading glasses on the ordinary stalls ranging from a few dollars to dozens of dollars have prescription labels, such as (200 degrees is S, you can see whether the thickness of the two lenses is the same, (generally the same lens thickness of the same degree), and whether the connection points are balanced, and, ** cheap glasses are not accurate interpupillary distance, I buy glasses for my dad to have interpupillary distance

Third, if you buy it in a regular eye store, it is recommended that you go to the store where you bought it to check the power, because the power of the lens can only be identified by the instrument

Fourth, find a person who does not have astigmatism, is not myopic or has a mild myopia and the same power to try it on, first cover one eye to look at a specific target, and then look at it with another eye, how much difference is there between the clarity of the object or text seen by the two eyes, if the difference is not large, the difference in power should not exceed 25 degrees

According to you, you should have no label on the glasses now, in fact, it is very simple, you find a straight line, and the edges and corners of the table words can also be used.

Then hold the frame of the glasses parallel to the edges and corners in your hand, move the direction of the perpendicular and the edges, and observe the difference between the graphics inside and the truth, and the degree of movement of the two lenses is the same. The principle is the prism shifting effect.

I'm an optometrist.

Of course, I also know when I go to the optical store to check the equipment.

There are generally the following ways to choose the prescription of reading glasses:1Choose according to your own eyesight:

If your vision is normal, you generally do not need to buy reading glasses; If you have some defects in your eyesight, you can consider buying a pair of reading glasses to improve your vision. 2.Choose according to the use occasion:

If it is reading glasses used in daily life, generally do not choose too high a prescription, generally between + degrees; If it is used for reading, work and other occasions that require clear vision, you can choose a higher degree, generally between + degrees. 3.Choose based on experience:

If you have an experienced friend, you can choose the right degree according to your own use experience, generally between + degrees.

1. First go to the ophthalmology department of the hospital to confirm the prescription of the front, and then choose the appropriate lens and frame style according to personal preference.

2. At the beginning of dazzle, you should first take the ophthalmology department of the regular medical Shen Jiduan Hospital or go to the regular optical store to confirm whether it is really presbyopia through the eye, and then determine the power of the dazzle, and choose reading glasses according to the power.

3. When choosing glasses frames, it is recommended to choose glasses frames made of non-metallic materials or lighter metal materials, so that when you wear glasses for the first time, you can reduce the weight of reading glasses and wear them more easily. You can also choose between a convenient frame and a foldable frame for easy carrying.

4. In the selection of lenses, it is recommended to choose single vision lenses with good filtering effect. Such lenses can effectively protect the retina of the eye, and the single vision lens will not produce a large parallax when the elderly go up and down the stairs, avoiding danger.

5. If the eyes are accompanied by myopia or astigmatism at the same time as presbyopia, it is recommended to choose dual-purpose reading glasses, half of the lenses are myopia and half are reading glasses or generally flat glasses and half are reading glasses, which is also more convenient in the process of use.

Summary. Pro: Can you determine the presbyopia degree according to your age? Presbyopia is caused by the gradual loss of the ability to regulate the lens of the eye after 40, and the power of presbyopia must be related to age, the power of presbyopia at the age of 40 to 45 is generally about 100 degrees, and it will increase by about 50 degrees every 5 years.

However, this degree is based on the average data of lens aging and degradation, and is not universal. Therefore, it is not accurate to determine the presbyopia degree by age, and it is only used as a reference.

Pro: Can you determine the presbyopia degree according to your age? Presbyopia is caused by the gradual loss of the ability to regulate the lens of the eye after 40, and the power of presbyopia must be related to age, the power of presbyopia at the age of 40 to 45 is generally about 100 degrees, and it will increase by about 50 degrees every 5 years. However, this degree is based on the average data of lens aging and degradation, and is not universal.

Therefore, it is not accurate to determine the presbyopia degree by age, and it is only used as a reference.

Reading glasses are a convex lens, and myopia lenses are a concave lens, which I have learned in physics class and can use physical principles to detect the power of reading glasses. Take a bright object in the distance as a light source, let the light emitted by the light source shine on the light screen through the convex lens, and then adjust the distance between the convex lens and the light screen to get the focus of the convex lens, and the power is 100 divided by the focal length. After wearing reading glasses, the prescription will increase with age, and you will need to re-wear glasses.

The prescription of reading glasses is generally determined by going to the hospital for an optometry examination, and the prescription of reading glasses can be diagnosed by doing an optometry examination and a professional physical examination. As we age, most people may develop vitreous, and cloudiness or decline may also cause dizziness, so you need to wear reading glasses in your life, and choose the right prescription according to the condition of each person's eyes when wearing reading glasses.

Hello, 45 degree reading glasses with empirical method to judge the prescription of the glasses is very happy to answer for you, here for you to inquire 1, age speculation that the adjustment ability of the eye will slowly decline with the increase of age, so the degree of presbyopia will increase with age, 40 to 45 years old presbyopia is generally about 100 degrees teasing, and then every 5 years to increase about 50 degrees. However, this power is based on the average data of lens aging and degeneration, and it is not universal, and most people's presbyopia power is different due to different eye habits, resulting in different growth rates of presbyopia. 2. The determination of presbyopia in refractive status examination also needs to be combined with refractive examination, that is, optometry, which can understand the refractive degree of the eyeball, and then determine the power of glasses in combination with age, for example, 50 years old can add about 100 degrees to the basis of optometry, and then audition for half an hour, and the power of presbyopia can be determined without obvious symptoms of eye pain and soreness.

Hello, please take epidemic prevention and control measures when you travel, wear a mask when you go out, and pay attention to safety. That's all I have, I wish you a happy life, smooth work, and good health.

1. Presbyopia is not exactly the same as other refractive methods, there are also degrees, and the power of presbyopia includes two parts: the first part is the power obtained by computer refraction, and the other part is the physiological farsightedness. For example, for people aged 50, under normal circumstances, the physiological degree of farsightedness is about 100-125 degrees; If the refraction shows 100 degrees of farsightedness, then the reading glasses are between 225-200 degrees.

2. Presbyopia, also known as presbyopia, is a degenerative lesion that is more common in middle-aged and elderly people. As we age, the lens gradually hardens, the elasticity weakens, and the function of the ciliary muscle gradually decreases, which causes a gradual decline in the ability of the eye to adjust, and difficulties in reading and other near work, which is called presbyopia.