8/4/2013 - Fake Oakleys The distance and the use of |
Fake Oakleys The distance and the use of
Due to the hyperopia eyes to see, is characterized by poor control. Diopter sight + 4.00 D (commonly known as the 400 degrees), the spectacle is set to operate only in the range of a few inches, like a pair of reading glasses, only users with a regular diopter sight, does not lead to complete the look. In other words, the consumer is not fixed to certain specified number of reading glasses, but using your own vision, should be based on the identification of reading glasses. For example, read, reading, writing, using-Strip 33 cm distance, known as the distance reading, use reading glasses the following ratio, and if you are watching on Television, usually at a distance of 2,5 m from the TV screen, people age
Therefore, if the reading glasses, must be based on their usage habits and needs, such as distance, select reading glasses reading glasses.
Two complementary vision of the necessity of
Under normal circumstances, at the age of 55 years old open hole (glasses) without view 0.86 m + 2.50 D (250 degrees), reading, reading glasses to a distance of approximately 0.27-0,40 m at greater distances. Apparently, 0.5-0.7 m from the dead, and this distance is commonly used in the second range (chores, shopping, use the computer ... ... ）。 The Blind spot is not a second look, so you can add your eyes dead zone at a distance, regardless of whether the open hole and the use of reading glasses are often in a State of fatigue, speeding up read the development level of presbyopia. If you need to + 2.50 d read distance (250 degrees) for reading glasses in their own health care needs and vision, shoulder-long distance (70 cm) and then get yourself a pair of reading glasses, it means that you can buy a pair of reading glasses, which can be read as a distance of low + 1.50 D (150 degrees), in addition to reading glasses to read. Used reading glasses, reading glasses, not far from the eyes of the different needs, from abroad, enjoy some reading glasses used in the rotation rotation; foreign sales of eyeglasses are packaged in one-family houses and villas for sale-several pairs of reading glasses, reading glasses, to varying degrees, which was less than 60 years + 4.00 D (400), the deepening progresses, poor vision health.
Enjoy reading glasses also need to measure the distance between the eyes, pupil, determines the distance the optical center of the lens, glasses on both sides should be consistent with or interfere with vision, dazzled wear effect Prism and lens dizziness, acid, distorted vision, swelling of the eyes, fatigue, etc. Choose frames in full accordance with the distance between the two Optical lens, fully taking into account the pupil of your eyes, and picture frame tilt.
Precise grinding of lenses and the correct view is important, should be carried out strictly according to the grinding jars doctor prescribed glasses. So enjoy reading glasses need to be the center of the hospital performance or professional optical shop, but for casual wear."adadcc12zadaw"
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8/4/2013 - The pupillary distance problem Fake Oakleys |
The pupillary distance problem Fake Oakleys
Wear reading glasses for the first time, you need to PD (PD), as the human eye, such as late harvest, depending on the axial rotation, so the pupil distance (read 33 cm, for example) as (title) of PD 4 ~ 6 mm. reading glasses are an important indicator of optical OCD (two lenses optical horizontal distance from the center point), OCD and PD takmerako consistent, as possible. National standards specify that the difference between the two, sunset red reading glasses 3 mm tolerance national standards, to the nearby PD = 62 mm, the use of reading glasses OCD value 59-65 mm. but it is the best choice, according to your choice, OCD, is smaller than the pupil distance glasses, OCD, as pupil distance glasses can cause eye pain, fatigue, inability to concentrate on the vision. In the case of distance learning Evaluation is too small, too big to be a mirror cannot be selected, the distribution may not be (a large box, extra large), there are no concentrate, reading glasses, is the best choice.
Reading glasses, also known as the old glass spectacle eye glasses optical products such as hyperopia class convex lenses. It is the same as the buyer will be able to identify the appropriate glasses style and color alone will not be able to buy. Reading glasses uses a complementary vision, seniors, like many national standard myopia Optical display, there are specific rules.
The most common method of correction of szemfáradtság to wear reading glasses. Double convex lens reading glasses, you can add the power of regulation is not suitable, eye correction of presbyopia. Opticians, optometry before and make sure that your next to the hospital, myopia, hyperopia and astigmatism, eye disease, and then increase or decrease the presence and degree of presbyopia. Astigmatism, astigmatism degree fusion-opticians need reading glasses. Of course, reading glasses, as well as in combination with patients usually use the working distance, increase or decrease the level of lens, near the working distance should be referred to the increased number of reading glasses. By contrast, according to the degree it should be reduced.
Enjoy reading glasses also need to measure the distance between the eyes, pupil, determines the distance the optical center of the lens, glasses on both sides should be consistent with or interfere with vision, dazzled wear effect Prism and lens dizziness, acid, distorted vision, swelling of the eyes, fatigue, etc. Choose frames in full accordance with the distance between the two Optical lens, fully taking into account the pupil of your eyes, and picture frame tilt.
Precise grinding of lenses and the correct view is important, should be carried out strictly according to the grinding jars doctor prescribed glasses. So enjoy reading glasses need to be the center of the hospital performance or professional optical shop, but for casual wear."adadcc12zadaw"
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