|Give children calcium zinc to prevent myopia|
|"A child's nutrition and eye development closely, determine the quality of vision." May 20 is the national student nutrition, Hanna Province, deputy director of the Eye Hospital physician Good hue Y said in an interview with reporters.|
Which nutrients to the child’s visual development have an important influence it? Good hue Y introduction, calcium, zinc, vitamin A, vitamin B and other trace elements, are helpful to the child's visual development and promote the role that they can maintain the normal physiological muscle and scleroses firmness and elasticity.
Youth calcium deficiency, it will make the eye wall scleroses tissue elasticity and collagen substance content decreased, axial length, easy to make eye fatigue, Chanel Sunglasses long time to cause myopia. Zinc is WHO recognized 14 kinds of essential trace elements, widely present in all tissues of the body, especially the iris of the eye, the retina, choroid highest concentration of zinc, zinc deficiency affects the photosensitive material synthesis, leading to vision reduce or even develop into night blindness.
Good-hue Y said that experts had children with refractive errors determination of trace elements, and found that the vast majority of patients with varying degrees of myopia, calcium, zinc deficiency, especially calcium-based.
Different ages on the intake of trace elements have different needs. In the growth and development of young people, a greater demand for trace elements, 4-10-year-old child daily intake of 800 mg of calcium, 11-17-year-old child should be 1000 mg per day. The survey found that our children the recommended amount of calcium intake is only about 40%.
"Intake of these trace elements is not difficult, the daily diet can get." Good-hue example, every 100 grams of food calcium content greater than 300 mg of food: kelp, seaweed, black fungus, black sesame, black food; fish , shrimp, shrimp, crab, seaweed, kelp, soybeans, walnuts, peanuts, mushrooms and other foods Grant Thornton calcium; dark green vegetables such as spinach, cabbage, rape, fennel, celery and other calcium content per 100 grams are about 150 mg .
Zinc deficiency, 60% of our children. In fact, the existence of a rice substance called physic acid, Chanel Sunglasses 2013 can be combined with zinc to form a compound, making the body can not properly absorb, leading to zinc deficiency.
Kids can improve eating habits to improve zinc intake. For example, eat legumes, brown rice and other whole grains. In addition, there are a wealth of animal offal zinc content, oysters, seaweed and other seafood like rich in zinc. Especially oysters, zinc highest per hundred grams of zinc is 100 mg. higher zinc vegetables are many, including: lentils, eggplant, cabbage, radish, lily flowers, spinach, and fennel dish.
Eclipse, monotonous food, etc. are not conducive to absorption of trace elements. She suggested that parents usually give their children to eat vegetables, fruits, whole grains, appropriate restrictions sweets. Excessive sweets can cause eye scleroses tissue elasticity, easy to cause myopia.
Good-hue Y said, Chanel Aviator Sunglasses, greenery can be thought that the child's vision to provide nutrition. Allow more children to participate in outdoor sports, more than the sun, see more lies to be conducive to promoting the healthy development of the child's eyes to improve vision.
|What is a lens tattoo?|
|Tattoos were also known as fog lens standard, printed with a coating layer glasses and lenses encountered in Chanel Sunglasses vapor, mist or Kazakh gas lens case can be significantly present physical map tattoo patterns, under normal circumstances, the pattern does not appear, and the not affect the normal line of sight without prejudice vision of vision and no injuries.|
R & D objective lens tattoos and background
In glasses and a prerequisite pattern patterned glasses must have coating layer. Acid plated layer by vapor etching, etching part of the normal naked eye can not see, but glasses Breathing encountered when steam or water vapor can condense on the coating layer into tiny droplets, which is not possible at the tattoo condenses into tiny droplets, thus achieving met Kazakh gas or vapor can show patterns, this way it will not affect Cheap Chanel Sunglasses lenses daily use, can borrow when needed so that patterns, beautiful and practical.
Physical renderings lens tattoo
Lens tattoos can print various parts of the lens, the lens can generally two corners, side edges, can also be set according to individual needs more lenses tattoo area, for example: the spectacle lens edge of a circle pattern, similar to the effect of lace, both prominent personality, but also play a decorative effect, but also as a means of security to increase the difficulty of counterfeiting criminals and costs. But if really necessary, also set in the middle of the lens, but considering the tattoo area Chanel Aviator Sunglasses may affect the optical performance of the lens, do not recommend this set up. As shown below.
|How to select a suitable lens(3)|
|(2) Requirements: To clearly know what they want to send this pair of Chanel Sunglasses primarily what use has been wearing? Spare? Movement used? Ask for anything from the most clearly? Need color, polarization or other treatment?|
Patients with high myopia and hypertrophy should buy high refractive index of the lens, in order to reduce the thickness of the lens, if the optional mirror of films to choose instead of the base film becomes changed, the base becomes relatively cheap but highly uneven discoloration few easy fatigue; The high requirements for color vision then choose low refractive index; Children advised to purchase optical resin lenses instead of optical glass, in order to ensure the safety of wear; generally dosed patients should multilayer lens to ensure resistance Most off against ultraviolet radiation on the human eye and increased light transmittance, while in the room with the old flowers are not large needs; water operators, driving, frequent outdoor sports, beach, snow actors because with polarized lenses; there photo-phobia, corneal Yen Ti, anorexia, diabetic osteopathy, osteopathy, laser cataract surgery before and after, usable mirror of protection; gradient lenses are multiform lenses to consumers in the elderly, which is characterized by is a glasses can see far but also look at the past, convenient and beautiful, but small field of view, there will be around blind, so how to choose according to their own needs is very important, such as near-near type is also still far in the Near type Near types, different types have different advantages and disadvantages, with a good experience there will be no election folded Presbyopia annoyance.
3 Find out yourself: know your habits, is as careful? Still readily littered? Optical resin lenses in the purchase, you should distinguish between the various resin lenses made of different materials, material is a thermoplastic, low cost but brittle, the low level of Chanel Aviator Sunglasses and aging lens with film; CR-39 is the most common optical resin lens, refractive index of 1.499, lower than ordinary glass, so the same degree and the diameter lenses compared to its thickness to be thicker than ordinary glass, refractive index greater than 1.499 resin lenses are 1.56 in refraction and 1.60,1.67,1.74 high refractive lenses, their prices are higher, the biggest feature is the weight lighter than glass safe, so give consumers, especially in patients with high refractive errors brought about wearing comfort, but the biggest drawback is easy to scratch the surface, poor durability, so whether Gaga durra and hardened quality of the film is critical; in addition there is still a PC resin lens, a very great impact resistance, with a hammer to hit not necessarily be broken, and only one-tenth of the weight of the glass, with the traditional Resin lenses is only compared to only half the weight, especially suitable for low vision, love sports, but its biggest drawback is very easy to scratch the surface and dispersion, could not be carefully protected and is not suitable for such chemical analyst.
Finally, you can start to pick your lenses the first step: The most important step! Choose high credit, enterprise qualification large scale, homogeneous species, and technical professional optician shop; choose a good seller is half success. Second Step three: according to their degree of screening appropriate refractive index of the lens is generally recommended 300 degrees or 200 degrees below myopia hypertrophy choose 1.50; 300 degrees or more 500 or less than 200 degrees of myopia or hypertrophy select 400 degrees below 1.56; 500 more than 700 degrees or 400 degrees of myopia less than 600 degrees of hypertrophy Select 1.60; 700 to 1000 following options 1.67; 1000 election than glass lenses or 1.74 resin film.
Step 3: Determine the refractive index of the post according to their needs and budget to select the appropriate 2 ~ 3 brands of lenses do meticulous comparison. Fourth step: to the customer to explain their case, professional customer service to the point of recommendation, after all, business experience and professional quality a lot higher than the average buyer. Finally: To determine the details of glasses, the whole spectacle of acceptance.
As a part of the optical quality of glasses is equipped to ensure that the cut in a lens is not reflected, such as the optical center of the horizontal distance and vertical difference between the optical center, astigmatism, location, etc. to meet the requirements, only in the whole sub- fitted before reflected. Therefore, you should also pay attention to the whole spectacle of the acceptance of this link.
Consumers no standard, no professional knowledge test, so the use of glasses acceptance method can only be the most original, the most intuitive, that feeling of wearing Chanel Sunglasses 2013. If after wearing glasses vision is clear and comfortable, and for a long time without fatigue (except over 60 years old), then a good pair of glasses should be considered is in line with the physiological requirements of your eyes, on the contrary, it indicates a problem glasses , does not meet your requirements.
|Corrected visual acuity with glasses reliable than surgery|
|Four years ago, high school geography teacher Yang Ming in hospital for eye surgery, postoperative eyes misty feeling, the doctor explained that it was an inevitable response brief recovery period, no need to worry. But three months later, Yang Min's eyes are still a blur, when the inquiry back to the hospital, wearing Chanel Sunglasses framework of the surgeon announced increases higher order aberrations can not solve the chronic surgery, Yang Ming to do the "adaptation" instead of "treatment." What role does myopia surgery there?|
China ranks first in the world the number of myopia surgery
It is understood that China has the world's largest myopia, at 1.3 billion people; more than 30% of people not see the world. In high school students, more than half the incidence of myopia, while in college students, and even as high as 70% to 80%. Because glasses affect the appearance, convenient movement, and contact lens itself has some problems, coupled with the school, and joined the army cadet physical examination, there are many requirements for vision, exciter laser surgery came into being, and increasingly more and more patients with myopia, especially students of all ages. Some statistics show that China has at least 70 million people each year through surgery removable Chanel Aviator Sunglasses, eye surgery which ranked first in the world.
Myopic vision disappeared surgical risk exists
With domestic hot myopia surgery compared with exciter surgery abroad is extremely cautious. University of California at Leos Angele Hospital for 1019 received surgery for myopia study found that 8.6 percent of patients in the surgery during or after surgery, the emergence of the corneal flap-related complications, such as corneal flap, flap wrinkling , resulting in blurred vision, or a foreign body sensation.
U.S. Food and Drug Administration has warned that there may be danger of myopia surgery and some complications, including permanent vision disappeared after additional treatment, such as surgery, the effect is not lasting. According to the American Association of Ophthalmology's statistics, there are 5% to 15% of patients had received surgery for myopia additional surgery. British health department survey found that surgical complications of myopia up to 10%, and once in the UK halted exciter laser surgery.
Eye experts say, is merely a correction of myopia surgery alternative methods, not all are suitable for surgery of myopia. Myopia surgery before the implementation of test results to patients should be truthfully advertised, and scientific and factual replies to questions raised by patients, neither exaggerate the effect of surgery, nor avoid the risk of surgery.
In fact, what is wearing Chanel Sunglasses Sale or surgery, many patients with myopia have a reference, look at those for myopia surgery surgeon in the end how much of it is still wearing glasses. Since the surgeon are wearing glasses, so unless absolutely necessary, why must myopia surgery.
|Inferior sunglasses wearing a long prone to dizziness|
|Thorn under the hot sun, the girls are generally chosen either Chanel Sunglasses umbrellas to shade, for the beauty of the girls, they focus on the style of glasses ignore the quality of the eye, but not worth the candle. To know there are ripples inferior lenses, this lens wear long easily produce dizziness, vomiting and other symptoms, greater damage to the eyes.|
Determine the quality of the lens tips
In a style selected, the most important to check the lens, because it directly affects the quality of glasses. Determine the quality of the lens there is a small trick that is placed in front of the lens about a foot away, looking through the center of stationary items and then gently move up and down. If it is plain mirror, objects should not move, if the object is moving along with the lens or distorted, it shows the lens is not flat, a bump, so definitely not buy sunglasses.
Buy sunglasses should pay special attention to the following points:
First, the first observation of the lens for scratches, impurities, bubbles, stripes, check the packaging of sunglasses, sunglasses should be marked with the formal name, color, diameter, quality levels, production and the name and trademarks, marked on the mirror or tag Anti-ova, nub and sunglasses cue mark in order to ensure a certain degree of UV blocking.
Second, buy Chanel Aviator Sunglasses try to wear when there is no dizziness, headache feeling. There are now a number of marked degrees of myopia sunglasses sale, but because the IPD and other indicators vary, so if there is no professional guidance, consumers had better not choose this with prescription sunglasses.
Third, with the hand corners facing the fluorescent sunglasses, so that the reflective mirror smooth scrolling, if you find the mirror reflection of the fluorescent film appears wavy, distorted shape, proof lens is not flat, so that the mirror can damage eyesight.
Fourth, the lens should be even, through a higher degree of clarity, sunglasses with glass and resin, two kinds of materials, and the best sunglasses polarized lenses should be used. It uses a sophisticated and contact lenses as light synthetic resin, the synthetic sheet 7 layers, the outermost layers of the hard wear-resistant layer; second layer, the second layer is a shatter-resistant reinforcing layer 6; No. 3 layer, a second 5 layer is UV filter layer, the middle layer is the most polarizing filter layer. Polarized lenses can effectively filter out harmful ultraviolet light reflection and have shatterproof, wear and other functions.
Fifth, Chanel Sunglasses 2013 color in addition according to their skin color, face, dressed to match, but should also be based out of places to choose. Generally better in dark gray, dark brown, brown and black, followed by blue and purple worst, because these two lenses through more UV.
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