Removes deposits. For rigid gas permeable contact lenses. Sterile. Patented. This unique patented formula is not sold to any retailer as a store brand. Original Formula Boston Cleaner removes debris and deposits from your lenses, leaving your lenses clean, clear and ready for your disinfection step. Removes dirt and debris for clean lenses. Because your eyes are so important - Don't experiment with just any brand. Not all gas permeable contact lens solutions are the same. Use only the brand recommended by your doctor.