This is an email address collecting system.
you have to register with a valid email address in order to get
instructions on how to access the forum, no email address, no access.
Use a yahoo or hotmail account that you don't care if you get spammed or
not, or better yet, talk to your own eye speciialist.
J

That same doc who founded:
Company Information

DoctorNet has the largest and fastest growing doctors' email address
database in the industry with over 300,000 doctors in over 55 medical
specialties in all 50 States of the USA and in many other countries.

DoctorNet has a huge Business-To-Business database for various types
of medical companies: over 100,000 email address for pharmaceutical
and biotechnology companies, CME companies, medical publishers, and
numerous other medical firms and organizations.