This definitely sounds like some type of injury with ensuing infection. You need to get her to a veterinarian. You do not want her to lose sight over something that could be readily treated with some opthalmalic antibiotic ointment. If she has lost sight, then ask the veterinarian your options which can determine the costs. But, if something can be done, it may be a relatively inexpensive treatment and/or antibiotic that may be the answer to help with healing. The Regal Swan