The strength of computer glasses depends on the prescription of the glasses you already have. There is special formula to calculate what strength you need for computer glasses . Take your prescription to the doctor and he will tell your what strength you need .
NO, i don't think so. eyes are very important organs for us. So, you'd better having eye test to know your prescription. And the eye doctor will give you prescription, of course including the prescription for computer glasses. And i think this is the safe way to know your strength for computer glasses.
Maybe you need to buy a pair of non-prescription computer glasses. But I still suggest you to have your eyesight checked first. Only the optometrists can know whether you need to buy a pair of prescription computer glasses or not. Good luck!
Dude, I suggest you to have your eyesight checked first. Though you think your eyes can see clearly when you are in front of a computer, it doesn't mean you can buy a pair of non-prescription. You'd better consult an optometrist after you get your prescription.
Usually Computer screens are positioned 20-26 inches from our eyes. This distance is closer than driving vision, but farther away than reading vision. You might have myopia so that your prescription glasses can help correct your driving vision. While you can see the things in the nearby clearly, so you think you don't need prescription glasses to help with your close work. But I still suggest you to have your eyesight checked and get a prescription first. you can tell the optometrist that you want to order a pair of prescription computer glasses with your new prescription, they will tell you whether you need a prescription for your computer glasses or not. Good luck!
Since you can see clearly, you don't need to get +1 strength. You can buy a pair of non-prescription computer glasses. The anti-reflective coatings on your lenses will help block reflections and glare for your eyes. Good luck!