If I am nearsighted, is it enough to just wear glasses?

When it comes to fitting glasses, many people are probably experienced. After all, myopia has become a common phenomenon among contemporary people. There are more than 600 million myopic people in my country, so many people have a say on this issue.

I believe that most people's opinions on glasses mainly focus on several aspects: which optical shop to choose? National chain or roadside shop, especially those near schools; which lens is better? Essilor or Zeiss or domestic Bright lenses? Of course, it also includes the choice of contact lenses or frame glasses.

However, what we are going to talk about today is an issue that is easily overlooked, which is optometry.

01. Why do we need eyesight test?

When it comes to eyesight testing, many people probably think that it is a very simple thing. Even in most cases in China, eyesight testing is a free service, so many people think that it is just a process that everyone has and they just need to pay attention to the lenses.

In fact, this is a very common misunderstanding in glasses. Compared with lenses, optometry may be more worthy of attention.

The important purpose of eye examination is to determine the optical parameters of the eyes and provide reference suggestions for myopia correction and prevention. It can be said that eye examination is the most important step in fitting glasses, providing basic information for the subsequent fitting of glasses. If even this foundation is not laid, it may not only lead to inappropriate lenses, but may even cause more problems due to ignoring eye health issues.

02. Why do we become nearsighted?

I believe everyone knows that the main reason for myopia is that the lens of the eye is deformed, which causes our line of sight to not fall correctly on the designated position.

This is what we often call axial myopia , which is usually corrected by lenses. However, myopia is not that simple. In addition to axial myopia, there are other types of myopia.

For example: refractive myopia. Refractive myopia refers to myopia caused by changes in the refractive factors of the lens, that is, it cannot fall on the correct position of the retina. Refractive myopia is often caused by eye diseases.

For example: pathological myopia. This type of myopia is caused by pathological changes in the eye, such as the macula, which leads to problems with the reception of light.

The above three myopia patterns are different and must be distinguished. If it is the latter two, it is not only necessary to wear glasses, but also to do corresponding medical treatment.

03. What should I do if I am nearsighted?

Therefore, after you become myopic, don't rush to get glasses. Instead, you should first determine the type of myopia. For example, whether there are any abnormalities in the basic structure of the eye, such as whether there are lesions in the conjunctiva, sclera, cornea, and iris. Only after these factors are ruled out can you further get glasses. The importance of optometry is obvious, especially for people with eye diseases, who should have regular eye examinations to prevent eye diseases in the early stages.

In addition, even for axial myopia, some factors need to be considered during eye examination, a typical example being the influence of pseudomyopia, which is particularly evident in adolescents.

What is pseudomyopia? In fact, it comes back to the adjustment of our eyes. The eyes are moved by the eye muscles. In our vision, the eye muscles also play an important role, and the adjustment of the ciliary muscles is typical, which has a huge impact on vision. If the eyes are overly tense, inaccurate vision will occur.

In order to deal with this muscle problem, the method of mydriasis is generally adopted, that is, using drugs to relax the eye muscles and finally obtain the true level of vision.

However, this drug also causes concerns among many parents. For example, the drug takes about three weeks to work for slow mydriasis and about one day for fast mydriasis. Many parents are also concerned about the impact of the drug itself on their personal health.

Therefore, the non-mydriasis technology has emerged. This technology can understand the fundus condition by analyzing the fundus through high-definition imaging. Since it is directly photographed, non-contact, and does not require drugs, it can evaluate the fundus more quickly and safely.

In addition, some other eye health problems also need to be paid attention to, such as the typical problem of intraocular pressure. The so-called intraocular pressure is the interaction between the contents of our eyeball and the wall of the eyeball, and the contents. This pressure has a normal range, that is, 10mmHg ~ 21mmHg (1.33kPa ~ 2.80kPa). If the intraocular pressure is too high, it may cause some diseases, such as glaucoma.

Because of this, for people with myopia, it is definitely not enough to simply test the degree, but they should conduct a comprehensive eye test to eliminate various health risks before choosing the right glasses. This will not only help you understand your myopia and choose the right lenses, but also help you come up with scientific strategies to correct and prevent myopia based on scientific and accurate optometry results.

04. About wearing glasses

Basically, we can see that eye examination is actually the first step in fitting glasses and it is also a very important part. However, many times, we tend to underestimate its importance, which results in the lenses not matching our vision. Moreover, due to neglecting eye health, some eye diseases are not discovered in time and become worse.

Of course, in addition to eye examination, some other issues also need to be paid attention to. For example, different occasions actually have different requirements for glasses. For example, driving may require anti-glare, reading requires attention to light, and staring at the screen may need to consider blue light issues, etc. Whether the glasses frame is suitable for the individual and the quality of the lenses are also important for myopia, especially for teenagers. Antibacterial may also be a factor worthy of attention. These will not be elaborated here, but I still remind everyone to pay attention to their eyes regularly and have regular eye examinations, so that the health of the eyes can be protected to the greatest extent.

Finally, it is strongly recommended that when choosing glasses, you must conduct a comprehensive eye examination with the assistance of a professional optometrist, under the guidance of professional equipment and professional optometrists. Generally speaking, the above tests can be completed in ophthalmology hospitals in major cities or in the ophthalmology departments of large hospitals.