Help blind Yogi see again. Cataract's operation required.

This is Yogi. He is a five year old Red Staffordshire Bullterrier who is the guardian of Marion and Brian my elderly parents. He is loved throughout their community and his presence allows them to live independant in their unit with a sense of security. Yogi has just been diagnosed with late stage cataracts which due to my parents own deminished vision and health went unnoticed for some time. We have just been told that to save any remaining vision Yogi needs cataract surgery to each eye costing a total of $6900 plus disperments. This amount of money is beyond what Brian and Marion have available.