In a preliminary study it was found that the corneal stroma of living rabbits can be shrunk by the brief application of concentrated salt solutions. In most cases the changes reversed in time but in a few animals it appeared that a permanent flattening of 2 to 3 diopters remained.
Cress J, Maurice DM. An Attempt at a Chemical Treatment of Myopia. Arch Ophthalmol. 1971;86(6):692-693. doi:10.1001/archopht.1971.01000010694014