1 If an object scratches the surface of one of your corneas or penetrates a cornea, keratitis without an infection may result. 2  In addition, an injury may allow bacteria or fungi to gain access to the cornea through the damaged surface, causing infectious keratitis.
Backyard egg is on the left, store bought is on the right. When cooked to over-medium, the store bought egg (left) spreads out much more than the backyard egg (right). The store bought egg (left) has a yolk that collapses when cut.The yolk texture is simultaneously a bit chalky and sticky.The backyard egg (right) has a yolk that holds its shape very well.his was an interesting comparison. The store bought eggs were fresh and of excellent quality, from a local medium-scale producer that does a consistently great job delivering humane eggs at a good price point. I would happily buy and eat these eggs if I did not keep chickens.
Dates on Egg Cartons Use of either a Sell-By or Expiration (EXP) date is not a federal regulation, but may be required, as defined by the egg laws in the state where the eggs are marketed. Some state egg laws do not allow the use of a sell-by date. Many eggs reach stores only a few days after the hen lays them. Egg cartons with the USDA grade shield on them must display the pack date (the day that the eggs were washed, graded, and placed in the carton).