Trifocals lenses have 3 regions to correct for distance, intermediate , and near vision. While
progressive lenses gradually increase the power from distant to near without visible line between the lens regions. In fact, the result of progressive Vs trifocal lenses can reveal much great difference between the two. They are totally different in solving eye problems and other compilations in common glasses. The former one can also provide great comfort to wearers at any time with great vision clarity, whereas the later has some shortcomings.