Boston Advance Contact Lens Solution by Bausch+ Lomb, for Gas Permeable Contact Lenses, 1 Fl Oz (Packaging May Vary) – Step 1 in the Boston ADVANCE Formula Care System – Boston is the #1 eye doctor recommended brand of rigid gas permeable (RGP) contact lens solutions – Rigid Gas Permeable contact lens solution from the eye care experts at Bausch + Lomb – Contact lens solution removes debris and deposits from lenses – Visibly tinted contact solution for faster rinsing