gradual multifocal spectaclesThe lenses were developed by Bernard Maitenaz, a Frenchman, after eight years of research and development. They were first used in actual products in 1959.
The design principle was to seamlessly connect the far-sighted area and the near-sighted area on the same lens through the gradual change of refraction, so that the same lens could simultaneously have the function of viewing a variety of different luminosity required for long distance, medium distance and close distance. It is suitable for people of all ages, especially those whose myopes do not exceed-10.00D and whose aberrations are less than-2.00D.
In terms of usage, it could be simply worn. One pair could replace the traditional three pairs of glasses and help prevent further deterioration of vision. However, eye discomfort may occur when using it for the first time, such as eye soreness, fatigue, or mild dizziness. Usually, it can be relieved within a few days. Users with diseases such as epilepsy, eyeball trauma, acute eye diseases, and high blood pressure should avoid using it.
From the optical center of the lens, it was much more complicated than the single-focus (near-vision, far-vision) lens. It required data such as the reference circle, the cross, the prism reference point, the reference circle, and the left and right lenses were different. Among them, the cross of the glasses corresponds to the customer's pupil, the distance reference circle is located 4mm above the cross of the glasses to measure the distance refraction, the prism reference point is located 4mm below the cross of the glasses to accurately measure the actual prism power of the lens, and the near reference circle is located below the prism reference point, which is the most accurate place to measure the near power and ADD.
In terms of focal point distribution, a single-focal lens only had one focal point, which could only see far or near. Although a bifocal lens and a three-focal lens could see far and near, the focal points were distributed in different positions, and the difference was large. Wearing it would cause situations such as jumping, dizziness, headache, eye pain, etc., while a gradually changing focal lens was connected by many focal points with small differences. According to the reasonable distribution of the four different areas, it could see far and near, and there would be no problems wearing a bifocal lens or a three-focal lens.
When choosing the frame, the height of the mirror ring should meet the distance field of view and the near field of view. The frame of the nose pad should be selected. After adjustment, the distance between the eyes should not exceed 12mm to obtain a better near-sighted field of view. The material structure of the frame should be firm and not easily deformed to avoid wearing discomfort caused by the frame distortion.
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Aux filter element cleaningThe cleaning method of the Aux filter element is as follows:
1. Separating the upper and lower sections of the water purifier filter core, opening the bottom valve, cleaning the dirt in the filter core, and then rinsing the upper section of the filter core with clean tap water. At the same time, use an unused toothbrush or other tools to scrub the surface of the filter core.
2. He filled the upper filter with about half a pot of tap water. After shaking the filter up and down a few times, he poured away the remaining water to make the pores of the filter unobstructed.
3. He filled the filter core of the lower section of the water purifier with tap water, patted the mouth with his hand to make it shake, and then washed the filter material with tap water. After repeating it several times, he stopped cleaning until the lower section of the filter core flowed out with relatively clean water.
4. After that, he cleaned the heating and cooling chambers, filled the upper container of the water dispenser with clean water (there was no need to fill it up), rotated the drain plug, and used a basin to catch the water flowing out of the drain hole. He repeated this several times.
5. Gently put the filter core into the filter cylinder, place the pad and the cover, tighten the screw, and complete the cleaning.
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What does Aux mean?Aux had many meanings. In terms of network equipment, the Aux port is an synchronous port, which can be used for remote configuration, dial connection, or connection with a Mum through a Transceiver. It is also often placed together with the Console port to adapt to different configuration environments. In the field of new energy, AuxSOL is a new energy sub-brand of Aux Yong, a new energy subsidiary of the Aux Group, which focuses on the international market. In terms of daily necessities, Aux was also used by Aux to name some products, such as all-copper faucet digital display thickened sink, automatic curling iron, etc. On the audio equipment, the Aux interface The Auxiliary Port is an synchronous serial port, mainly used to input audio signals. The user can connect the 3.5mm audio cable to transmit the audio from the mobile phone, MP3 player and other sound source equipment to the audio system to play the audio. It has also been used in car audio and other equipment. Although the use of USB interface, Bluetooth and other technologies has decreased in some devices, it is still widely used in a variety of audio systems. It could also be used as an ordinary synchronous serial port on a router-based device.
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c est surtout une question de grammaire et de vocabulaire non adaptés. mais dans l ensemble les livres sont prenants