Bacterial contamination of corneal contact lenses is a recognized hazard to their use. The problem of storage of lenses has received much attention, but there is still a controversy as to whether a dry case or a wet case is the safer method of storage.
Fifty contact lens patients, using three different types of storage cases, each for a period of two months, were studied. Bacterial cultures were taken of the storage cases and of the patients' eyes. The wet storage case, containing a soaking solution, showed significantly less contamination than did the dry cases.
Magoon RC, Sexton R. Wet or Dry Contact Lens Storage. Arch Ophthalmol. 1967;77(2):197-199. doi:10.1001/archopht.1967.00980020199009