I am sorry to hear about Roxy's strange looking eye.
Does her eye seem to look like the dog's in the link below?
If so then her lens has luxated.
The lens normally sits in the center of her eye, behind the colored iris, and focuses light on the retina so she can see.
If the lens moves out of place luxates it can interfere with normal vision and block normal drainage of the fluids circulating in her eye, which can lead to glaucoma (increased pressure in the eye) and permanent loss of vision. In some dogs glaucoma occurs as a primary condition and causes the lens to luxate.
Here is a link to line drawing that shows a normal lens position and a lens that has partially luxated into the anterior (front) chamber of the eye. http://vetspecialists.co.uk/images/factsheetImages/Lens-Luxation.jpg
If her lens has luxated she should see a veterinary ophthalmologist promptly to check the pressures in her eye and be treated. The increased tearing may indicate pain and possibly that her eye pressure is already increasing.
If this resolved in the shower then it is likely what you were seeing is a strand of mucous on her eye. That is great news!