In addition, many people suffer from age related farsightedness (presbyopia) as they get older and require reading glasses or bifocal lenses. This problem occurs because the natural lens in the eye slowly stiffens as it matures and thus loses its ability to accommodate. Presbyopia is not caused by a change in eye length. Therefore, a laser treatment can only provide limited help. If your eyes are presbyopic, ask your physician about possible treatments that can improve your sight.