In a small bowl, place the pear slices in the lemon juice and water for five minutes.
Remove and dry with paper towels. Reserve the pears in the refrigerator until ready to serve.
In a small sauce pan, heat the sugar and vinegar over med/hi until it begins to boil. Turn the heat down to med/low and simmer, stirring occasionally until reduced by half. The sauce will be thick enough to coat the back of a spoon. It will thicken even further after it cools.
Allow the sauce to cool completely.
Plate the pears and drizzle with the sauce. Sprinkle the goat cheese on top and serve.