Since reading glasses are taken on and off all the time they are put under more pressure than a pair of ordinary prescription glasses. In order not to loose your reading glasses it’s a good idea to buy a glasses cord. When putting on your reading glasses you should use both your hands, that way the frames will keep their shape a lot longer.
It's also important to clean your reading glasses regularly. There are wipes and sprays suitable for all types of lens; we sell Optinett products which are especially good for multi coated and anti reflective lenses.
When you are not using your reading glasses you should always keep them inside their case.
And of course the Dont’s
1. Clicking the "VIEW EYE CHART" button will bring up the reading chart in a new window or tab.
2. There you click on the print button as seen below. This will bring up a print dialog. 
DO NOT select Print from the file menu.
3. In this dialog, set the Page Scaling to None.
4. Click the OK button to print the chart.
1. Without glasses place the chart in front of you, at a distance of approximately 15" (40cm).
2. Read down the chart until you reach a line that you cannot read clearly and the number on the right is the lens strength you require.