if the cornea is getting bluish could mean there is edema (fluid) in the cornea.Edema is not a diagnostic but could be the underlying cause of:
Degenerative aging changes
Breed predilection: Dachshund, Boston terrier, Chihuahua (not your dog!)
Lens luxation (anterior)
Uveitis (anterior): inflammation inside the eye: http://www.eyecareforanimals.com/uveitis.php
Lagophthalmos (inability to completely close the eyelids, which does not seem to be his problem) .
A corneal tests may show some ulcers . If not ulcers are present, your primary care veterinarian may choose to use some corticosteroid ointment to eliminate some inflammatory process.
The tearing is likely due to pain (called blepharospasm).
It might be good to recheck the eye pressure. If they have uveitis, the pressure tends to go lower then normal.
The treatment will depend of the underlying cause (glaucoma, lens luxation, uveitis).
Just speaking about the corneal edema, topical hyperosmotic (5%) NaCl ointment or solution applied on the eye may help decrease the amount of fluid in the cornea.
Here is a link about Corneal Dystrophy with available treatments:
Let me know if you have more questions, or need additional information.
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I will wish for the best.