Sometimes worsening eyesight can creep up on us without being noticed. We tend to adjust to slowly deteriorating vision, making it hard to tell when we start to need glasses or a new prescription. However, by that stage, your vision could have become bad enough to make activities like driving dangerous, so it's worth paying close attention to how well your eyes are working. If you are wondering 'do I need glasses', there are some ways that you can test yourself without a trip to the optometrist. One sure sign that you need glasses is when reading and computer usage becomes steadily harder. You may still be able to see text or graphics clearly, but reading can become progressively more tiring. Computer users also commonly develop neck pain from bending close to their screens. If this sounds like you, it's probably time for a test.