Whisk together the flour, eggs and buttermilk in a large bowl. Stir in pear, cheese and most of chives, reserving some for garnish. Combine well.
Heat half of the oil in a large non-stick frying pan over medium heat. In batches, drop large spoonfuls of the mixture into the pan and cook for 2 minutes each side or until golden brown and cooked through, adding the remaining oil as necessary. Top fritters with a little sour cream, pear and chives to serve.