The 30, 40, 50 & 60 Years 'Young' patients are just now noticing that their eyes may not have quite the clarity and comfort as they would like. It may be harder to see both, reading and distance. Patients who use the terms "tired", "dry", "over-worked", "strained" or "stressed" are really just noticing these changes now.
There may have been a great deal of time since your last full eye examination. Raising a family or succeeding in a career can keep people from having the time for regular eye and physical examinations. It always seems family and work come first, but now, take time for yourself. It's your eyesight! Occasionally, eye examinations can be a prelude to diagnosing physical disorders.