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During the past year I have employed formalin in all cases of blepharitis. To apply it I use a toothpick with a small cotton mop wrapped on the tip so that it does not take up enough solution to run into the conjunctiva. The solution is made of the strength of 2 per cent. to 1 per cent., beginning with the weaker. It must be frequently renewed or prepared extemporaneously at the time of using, in order to insure uniformity of strength.
The lid is drawn away from the eye-ball. The mop dipped in the solution is rubbed gently along the margin among the lashes until all the scales and crusts are removed and until the surface of any little pustule is rubbed off. The site of disease is thus left clean and smooth. The mop is renewed a time or two during each operation. A little bland oil may be
MOULTON H. THE USE OF FORMALIN IN THE TREATMENT OF BLEPHARITIS.. JAMA. 1898;XXXI(12):641. doi:10.1001/jama.1898.92450120015002e