Need new glasses? Online eye exams and vision tests offer a convenient way to get a glasses prescription. Doctors explain whether these services are worth trying.

Dr Leow advised that children should have a general eye test at the age of three ... of times the children spend on a computer continuously. While adults using the computer can adopt the 20-20-20 ...

The test requires you to cover one eye and, using the other hand that's keeping the phone raised at chest level exactly 12 feet away from the computer, swipe in different directions on your screen ...