HI, the bottom pic was quite a bit blurry to view however the top picture resembles what I see occasionally with my Chubbs. Of all my 5 boys, he's the only one that gets small crusty particles, white in color. Pigs by nature excrete a white milky substance that they use to clean themselves with and for eye lubrication. My concern would be if the crust was discolored associated with frequent sneezing and coughing as well as changes in his respirations (breathing irradically or abnormally), how is his behavior?? lethargic, hiding? When in doubt shout...If your vet says he's fine but something is making you second guess yourself then that's your instint talking to you. In that sense I would go to a different vet for a second opinion. If your vet doesn't specialize in exotics, then it would be to you and your pigs benefit to find one who is. Many vets are more accustomed to dogs, cats horses but not experienced with small exotics. As far as how to remove the crust safely is your can try applying a warm moist compress gently against the eye to loosen it or, try rinsing with sterile ophthal saline solution. One of my boys sustained an eye injury from a pig braul. He sustained a corneal abrasion with a cut to the lower lid. I used the solution to gently rinse the debree then applied a prescription eye ointment. The eye was completely healed within a week. Take advantage of you vet visit and ask questions. Good Luck