Now Available... For the convenience of our members, the International Strabismological Association (ISA) is now accepting credit card payments of annual membership dues through the website. Annual dues are $45.00 USD and can be paid by VISA, Mastercard, Discover, or American Express. If you prefer to pay by check, please send your payment to the address listed below made payable to the International Strabismological Association in US dollars and drawn on a US bank.       Credit Card Merchant Services       ISA Dues 2009: $45.00 USD ISA Dues 2010: $45.00 USD If you are delinquent in your dues membership, you may also pay dues for 2008 and 2009 to return your membership status to active. ISA Dues 2008 & 2009: $90.00 USD If your 2009 dues are still payable and you prefer to pay them along with the dues for 2010, you may do so below. ISA Dues 2009 & 2010: $90.00 USD Contact Information International Strabismological Association 702 Rotary Circle Indianapolis, Indiana 46202 USA FAX: 317-328-8864 Email: isa.lms@juno.com Return/Refund Policy There are NO RETURNS OR REFUNDS for membership dues collected.