This section is from the book "The Lady's Assistant: Family Physician", by P. Davey and B. Law.
When there is a hot salt defluxion falls upon the eyes, which glews the eyelids together, especi-ally in the night time, you must take a grain of white vitriol, and mix it intimately with a little unsalted butter. Put this into the greater corner of the eye at night going to bed, and it will effect a cure. A Pellicle or thin skin which covers the eye may be taken off with the fresh fat of vipers dropt into the eyes.