Patient lens-care guide Progent is an intensive cleaner for rigid gas-permeable lenses, including many RGP, orthokeratology (ortho-k) and scleral lenses. It helps remove stubborn protein and deposits that daily cleaning can leave behind. First, check your lens coating. Do not use Progent on Tangible Hydra-PEG–coated lenses unless your Mark Hinds optometrist has specifically confirmed it is… Continue reading How to Use Progent Part A & Part B