The aim of the IOA is to promote the science of orthoptics worldwide, to provide information and support to national bodies and individual orthoptists, and to help maintain and improve standards of education, training and orthoptic practice. The number of members and member countries continues to increase. The IOA represents national associations stemming from 22 different countries, individual orthoptic members from countries that lack national orthoptic associations and ophthalmologists who are supporters of the profession. The IOA is proud to have approximately 12,000 orthoptist members worldwide.