Deli k-900 eye * * * Eye Relaxation Instrument can maintain and treat myopia, dark circles, eye fatigue and other problems, which is quite easy to use. You can search for' Kong shopkeeper Taobao shop' on Taobao. Optical science:
Wearing reading glasses is also very learned. You must have an accurate optometry and re-optometry every five years.
presbyopia
Glasses, or wearing inappropriate glasses, will only be counterproductive, and even cover up some eye diseases, such as [2] cataract, eye diabetes and so on. Modern reading glasses mostly use progressive lenses. The lens is divided into three parts: the upper part looks at distant objects (glazing area), the lower part looks at near objects (near light area), and the middle part (middle light area) is used to look at distant objects. The three light zones will gradually change with the degree, so as to adjust and watch objects at various distances. Wear it, you can see far and near. Never buy reading glasses when you meet them. In fact, these traditional reading glasses are only used to help you "see close" and never wear them when you are far away.
Misunderstanding of glasses
Myth 1: buy a cheap picture.
Buying reading glasses with fixed degree and pupil distance at will is difficult to match the wearer's actual degree, pupil distance, face shape and brain type, which not only fails to achieve the best visual effect for the elderly, but also causes visual interference and eye fatigue.
Myth 2: Wear a pair of reading glasses to the end.
When a pair of presbyopic glasses is worn to death, when the lens appears scratches, aging and other phenomena, the luminous flux decreases, which affects the imaging quality of the lens and accelerates the rise of presbyopia. Presbyopia should be checked regularly, the glasses frame should be adjusted, and the lenses should be replaced in time.
Myth 3: Magnifier replaces reading glasses.
A magnifying glass replaces reading glasses, which are equivalent to 1000-2000 degrees. If you indulge your eyes for a long time, it is difficult to find the right degree with reading glasses.
Myth 4: Many people use a pair of reading glasses.
When couples use a pair of reading glasses, one of them must accommodate the other. As a result, their eyesight is getting worse and worse, their reading level is rising rapidly, and it is more and more difficult to see things.
Myth 5: Young people don't get old.
Modern people can't read books, newspapers, computers, mobile phones and stocks without their eyes. The phenomenon of high premature senility of eyes is common, and presbyopia occurs in advance. It used to be "forty-eight without flowers", but now it has been advanced to early forties.
Myth 6: Presbyopia will be good for itself.
You can read without reading glasses. In this case, you have early cataract and turbid lens. Water absorption causes refractive changes, similar to myopia, which just "reaches" the degree of reading glasses, and you can see nearby objects without reading glasses.
Myth 7: Presbyopia is a normal physiological phenomenon and there is no health care problem. When people reach a certain age, in addition to presbyopia, there are often many eye diseases such as dry eye, cataract, glaucoma and age-related macular degeneration, which will affect visual function. After presbyopia occurs, you should go to a regular hospital for a detailed examination. Usually reading books and watching computers should not be too long, often looking down and blinking, doing more outdoor sports and eating reasonably.
Myth 8: Myopia will never lead to presbyopia. In fact, the original refractive state of the eye will affect the appearance of presbyopia symptoms sooner or later. For people who have farsightedness when they are young, presbyopia appears early, myopia appears late, or does not appear. But not all myopia, don't need to wear glasses at any age.
Myth 9: Presbyopia will not change with age. In fact, people's reading glasses will be replaced every five years with the increase of the degree.
Myth 10: Reading glasses are a commodity, and you can buy them at will. As a special commodity, reading glasses can't be bought casually, and their wearing varies from person to person. If you don't know the original refractive state, you can't determine the degree of reading glasses. Presbyopic glasses must be equipped in hospitals or optometry professional institutions.
2. With glasses, how to choose glasses frames and lenses?
Glasses are the same as clothes. Glasses with a few dollars in the market are the same as clothes supported by pounds, so the factors that determine the quality of glasses are brand and price. I'll just follow the optician's procedure. Only cheap glasses on the market are mentioned here. First of all, don't choose to wear glasses on holidays or during busy traffic hours. A pair of glasses normally optometry about 15 minutes, try on 10 to 20 minutes. It takes more than 20 minutes to make lenses. So the whole process takes at least 45 minutes, so if some stores are busy, the optometry time will be reduced accordingly. I used to make a pair in 20 minutes, and when there were many people, I made three pairs in 20 minutes. So the corresponding mass is different. In addition, optometrists also need to verify. My friend has been an optometrist for 9 years. When he worked in his old club, he was responsible for optometry training for new employees. Generally, after more than one month of training, the boss will buy a certificate and hang it in the store. Therefore, you should pay attention to the optometrist in the optical shop when wearing glasses. Mirror frames can be roughly divided into metal, plate and natural materials. (The most expensive is the natural tortoise shell series) Among them, titanium alloy has high strength and is relatively light. The choice of frame should be based on your own preferences, and be careful not to choose one that is easy to deform, because if you have astigmatism, the deformation of frame will affect the axial position of lens.
The following is the necessary process of optometry: consultation-computer optometry-old mirror test-pupil distance measurement-comprehensive optometry-insertion audition-photometric adjustment-optometry prescription.
First, consultation:
First of all, the customer's past glasses, wearing habits, working environment, working distance, eye habits and related accompanying symptoms, history of eye surgery or injury, history of other eye diseases, etc. , so as to fully understand the customer's visual health needs and the purpose of glasses. (You can drop one or two eye drops to relieve fatigue before the exam. )
Second, computer optometry:
Approximate data of preliminary measurement for reference.
Third, the old mirror test:
Naked vision (test with glasses)
Four, pupil distance measurement:
The optical center of the lens matches the pupil of the human eye.
Five, comprehensive optometry:
The lowest luminosity to ensure the best vision of one eye.
Accurate measurement of astigmatism axis and astigmatism with crossed cylindrical mirror.
The red and green test ensures that the degree is not correct.
Balance your eyes so that they can see clearly and harmoniously.
Sixth, try on the insert.
Try it on for about 10-20 minutes. Ask about any discomfort and other needs.
In the first picture, if you see every dotted line in the picture during the test, some dotted lines are clear or dark, and some dotted lines are fuzzy or white, then you may have astigmatism.
In the second picture, if you see that the red color in the picture is much clearer than the green color, it means that the glasses you are wearing now may not have enough degrees, or your degrees have increased now!
If you see that the green color in the picture is much clearer than the red color, it means that the glasses you are wearing now may have a high degree, or your current degree is relatively light!
Seven, photometric adjustment:
After trying on the insert, understand the customer's feelings when trying it on, and ask if there is distortion or blurred vision, dizziness, nausea and other phenomena. , and make appropriate adjustments and analysis according to customer feedback.
Eight, prescription:
According to the customer's original glasses, make corresponding adjustments to the eye needs, occupation, working environment and living habits, and then prescribe glasses suitable for customers.
3. Do glasses have any common sense?
1, see keywords for lens packaging identification.
At present, all optical lenses are used in the market, some of which are ultra-thin, anti-reflective, anti-ultraviolet and impact-resistant. No matter what kind of lens you choose, you should pay attention to the packaging bag of the lens. The packaging bag should be marked in Chinese that meets the standard requirements, such as factory name, address, telephone number and top power. Otherwise, there will be quality hazards.
2. Ask * * * for glasses certificate.
After debugging customized glasses, if you feel uncomfortable, you should go to the optician's shop to re-check, re-debug customized glasses or replace lenses.
At the same time, no matter where there are glasses, you must ask for glasses coupons, which is the basis for relying on relevant departments to solve problems in the future.
3. The sum of the number of temples is equal to the pupil distance.
When choosing a frame, the pupil distance is the first factor to consider. The temples of each pair of spectacle frames are marked with numbers 52- 14 and 54- 16, which respectively represent the geometric dimensions of the lens ring and the dimensions of the bridge of the nose. The sum of the two numbers should be equal to the pupil distance of the optician.
4. What is the principle of glasses and how to maintain your eyes with a thermal eye relaxer?
Deli k-900 thermal eye-relaxing instrument is very good for eye care. It has several functions and is very good for treating myopia and eye fatigue. You can go to Taobao's' Kong shopkeeper Taobao shop' to buy it. Principle of glasses:
There are two kinds of astigmatism: regular astigmatism and irregular astigmatism. Irregular astigmatism cannot be corrected with optical glasses, only hard contact lenses can be effective. Conventional astigmatism can be corrected with optical glasses to improve vision. As for the degree of vision improvement, it depends on the degree of astigmatism, which is inversely proportional.
Generally, the corrected vision of mild and moderate astigmatism often reaches the normal range, and it is difficult to get good corrected vision for high astigmatism, especially for high hyperopia, and it is impossible to see the object clearly by adjustment. If it is not corrected as soon as possible in early childhood, the development of visual function will be inhibited to some extent. When you get older, you will wear corrective glasses, and your corrected vision will be worse, which often leads to moderate amblyopia. Astigmatism in high myopia is better. Although the vision is far from clear, the near vision is still good, and the visual function has been exercised to some extent, but it has not been completely suppressed. Correcting vision is better than correcting astigmatism of high hyperopia, but it should be corrected as soon as possible. Early correction of high astigmatism can not only promote the development of visual function, but also reduce the wrong reaction of object deformation and spatial positioning, which is easy for patients to accept and adapt. Astigmatism glasses have the following principles:
(1) Low astigmatism is physiological, that is, hyperopia astigmatism is within +0.5d and the axis is 90. Myopic astigmatism is less than 0.5D, and the axis is 180. (Because the cornea is affected by the pressure of the upper and lower eyelids, the curvature between vertical diameters is greater than that between horizontal diameters, so the bending force between vertical diameters is stronger, and the bending force between horizontal diameters is weaker) Generally, it will not affect vision, and it is usually unnecessary to give glasses. If astigmatism changes axially, which affects vision or has symptoms of asthenopia, it should be corrected even if the degree of astigmatism is low.
No matter whether the astigmatism is high or low, the direction of the eye axis must be correct, otherwise it will leave patients with new ametropia and bring unacceptable interference symptoms. Astigmatism should be corrected in a low degree without affecting vision or eliminating symptoms, especially when the astigmatism degree is high and the axial direction is not between the positive axis and the diameter, the correction should be retained. Complete correction will make patients feel that the size and shape of the object image are not the original, and the deformation will cause errors in spatial positioning. Often hyperopia astigmatism is more serious than myopia astigmatism.
(2) Children, teenagers and exotropia can correct the astigmatism of positive myopia within 3.00 d; Young adults who have worn glasses to correct axial astigmatism should be appropriately reduced by 0.25 d ~ 0.50 d, and some individuals with oblique axis and off-axis should be reduced more according to their adaptability; Hyperopia astigmatism should be reduced more except esotropia.
For children, teenagers and exotropia, the positive hyperopia astigmatism above 3.00D should be appropriately reduced by 0.50D~ 1.00D, and it should be reduced when individual oblique axis or off-axis is unacceptable, and then increased after wearing glasses for 3~6 months. Hyperopia astigmatism should be reduced more; Oblique axis, off-axis, high degree, although the degree is reduced, the patient's interference symptoms are slight after audition, but when prescribing, it should be made clear that wearing glasses will cause visual distortion and spatial error, and it will take some time to adapt, so as to avoid worrying about putting glasses aside. Some patients wear incorrect axial astigmatism glasses for a long time, and their vision has improved. Because they have adapted to the wrong glasses, the new position and spatial errors of the object image caused by the new correct glasses have to be re-adapted, which is often unacceptable at once and takes some time to adapt, especially for elderly patients.
General spherical mirror 1.00D~3.00D, astigmatism 0.25D ~ O.50D, spherical mirror 3.25D~6.00D, astigmatism 0.50, spherical mirror 6.25D~8.00D, astigmatism 0.75D, spherical mirror 10.00D, astigmatism 650. Beyond the above range, as the case may be; Some patients have poor sensitivity and it is difficult to distinguish the axial direction, so they should be administered in the direction close to the correct axial direction.
After wearing it, reduce the degree and completely correct it. Simple astigmatism below 2.00D can be completely corrected once, and it can be corrected twice after 2.00 d: compound astigmatism spherical lens below 3.00D, cylindrical lens below 0.50D, spherical lens above 6.00D, astigmatism above 0.75D or spherical lens above10.00 d.
5. Precautions for glasses. What kind of thermal eye relaxer should I choose to better protect my eyes?
If you want to protect your eyes better, choose the' Deli K-900' thermal eye-relaxing instrument, which is very, very good, healthy, intelligent and energetic. You can go to Taobao's (Kong shopkeeper Taobao shop) to search. The clerk's service is very good. The manager can contact Yiji 159~999~333~98. Glasses aesthetics, glasses matters needing attention:
1 First of all, you should choose a regular and reputable optical shop for glasses, and the quality and service of glasses are guaranteed.
2, before glasses, should first optometry, not blindly buy.
3. After the glasses are made or purchased, the optician will make glasses according to the face. Generally speaking, if the parameters are appropriate, you will feel very clear when you put on new glasses.
If you find any quality problems with the products, you should contact the store in time.