The America Society of Ocularists:

http://www.ocularist.org

The National Examining Board of Ocularists:

http://www.neboboard.org

The American Academy of Ophthalmology:

http://www.aao.org

The American Society of Ophthalmic Plastic & Reconstructive Surgeons:

http://www.asoprs.org

Micro & Anophthalmic Children's Society

The American Journal of Ophthalmology 

Low Vision Society