One of the obstacles that are owned by the user minus or plus glasses are glasses should be changed to suit the state of the eye, if the minus increases. This is certainly quite difficult for those living in remote regions or for those who have not much money But, by using Eyejusters, you do not have to worry anymore, because the glasses on this one you can adjust the range minus and plus its own so that you can set it up, until you actually see comfortably. The workings of this tool is pretty simple, you just turn a key in addition to glasses slowly until you feel comfortable to see. These glasses have a minus range (-5 to 0) and positive (0 to 4.5). And the good news is Eyejusters price is quite cheap, about $ 39.95. and you can use a lifetime because if minus increased, then you just turn the knob to adjust.
sumber : beritateknologi.com
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