Refractive eye surgery tends to be best suited to people who are over the age of 50 as this is when presbyopia normally develops. However if you are under 40 and you have a high prescription and have been diagnosed as someone who is unsuitable for laser eye surgery you may also be a good candidate for lens replacement. The Consultant Ophthalmic Lens Surgeon that you see at your free consultation will determine if lens replacement surgery is for you by carrying out a series of tests.