This disease of the sclera or white part of the eye is treated as an immune mediated disease with topical and/or systemic anti-inflammatory agents.
Recovery can require long term treatment and care and treatment time can last several weeks.
This site has excellent info on this disease and choices of treatment options
http://www.petplace.com/dogs/episcleritis/page1.aspx
simply close any pop up wnidows you may see and scroll down the page past any ads to see all the info. The site has good data once you get around the inconvenience of the ads.
Hope this helps you!
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30+ yrs dog home vet care & nursing, rescue, behavior&training, responsible show breeding, genetics