I have often found that someone who has tried progressive lenses and didn’t like them most likely had the lenses made to imprecise measurements. This mostly occurs from either inexperienced sales people taking those measurements, or sloppy lab work. Recently we discovered another less common cause that we call “Turtle Neck Syndrome”. This occurs when a patient who normally slouches, straightens their posture when being measured. This changes the O.C. (ocular center) which is critical for progressive lenses to work. Spotting someone with T.N.S. takes an experienced eye. If you think you can’t wear progressive lenses because they didn’t work for you before, think again.