• Follow us
Home > News > Content
How To Identify The Good And Bad Quality Of Acetic Acid Sunglasses
Jul 10, 2017

How to identify the good and bad quality of Acetic acid sunglasses

1. Look at the appearance of the acetate sunglasses:

1) plating, baking varnish coating, surface polishing and other surface color uniformity, without obvious defects, spots and scratches.

2) lenses, mirror legs and other printing, laser and engraving strokes are clear and smooth, easy to recognize and easy to fall off.

3) lens color is correct, no color difference scratches and bubbles, gradual color over nature, right and left lens color symmetry.

4) the feet of the sunglasses with acetic acid are facing the fluorescent lamp, so that the reflector of the mirror gently moves, the light shadow will not appear wavy and distorted, indicating that the lens has no stress.

2. Look at the packaging and origin description:

Good acetate sunglasses with complete packaging, tags, or specifications, tags, product code and instructions on the product description, industry quality standard and detailed dealers or contact lens manufacturers manufacturers.

3. Finally try it:

Good acetic acid glass is clear and true, wear comfortable, sunglasses manufacturers, do not press the nose of the nose, temples, ears and so on. Fine craftsmanship, smooth and fine lines, smooth and natural lines.

Why the phenomenon of giddy when wearing Acetic acid sunglasses? There are three main reasons:

1, prism degree of overweight: prism degree from the lens to the distance of the object, 100 times the object image point on the ability of the lens, the imaging point deviation distance and object to the lens with cm/m distance ratio, including two indicators: the difference of the vertical meridian lenses in pairs is not more than 0.25 cm/m, the difference of horizontal meridian not more than 0.75 cm/m: if a pair of acetate sunglasses lens two arbitrary index more than this standard, which will make the person feels eye swells.

2, steradian overweight: steradian is the average of the two main meridian optical lens degree of ︱ D1 + D2 ︱ present 2, standard within + / - 0.12 mm, if more than this standard, which will make the person feels dizzy.

3, spread photometric overweight: luminosity are the two main meridian optical lens degree absolute difference ︱ D1, D2, ︱ within standard should be greater than 0.12 mm, Acetic acid sunglasses if more than this standard, which will make the person feels dizzy. The above three indicators are stable and not easy to exceed, and over 6C is more than 6C. The optical processing difficulty is multiplied and the bending of the big finger is above 8C.

Most people who travel outdoors know that uv rays can cause damage to the skin, such as sunburn, accelerated aging and skin cancer. But not knowing that ultraviolet light can also cause serious harm to the eyes. Prolonged exposure to uv radiation can lead to corneal burns, Acetic acid sunglasses cataracts, macular degeneration, and eyelid skin cancer. The American journal of optometry also pointed out that the sun produces damage to every part of the eye, and a cumulative, when the light into the human eye, only certain wavelengths of light can stimulate retinal photoreceptor cells, we can see, this is the "visible", the light field in wavelength between 400 mm to 800 mm, frame manufacturers, but ultraviolet these invisible light absorbed by the eye, accumulated for a long time the eye cornea, retina, lens is damage, Acetic acid sunglasses such as would lead to cataracts, photochemical corneal eye, eye diseases. Besides sun hat, sun umbrella, sunglasses is also summer indispensable sun shade tool, not only can shade strong light and also be the prop of fashionable life.