From your mid 40s onwards, normal age-related changes mean your reading vision will likely start to suffer. This is known as 'presbyopia'. Most people underestimate this, and merely hold their phone or book further away. Once your arm isn’t long enough, it’s time to pick up some reading glasses. This will happen to us all, whether or not you’ve had laser eye surgery, but the changes affect some people more than others. If you’re long-sighted (hyperopic), you could need reading glasses even in your 30s, and then after a few more years find yourself dependent on distance glasses as well.