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Optica will be performing scheduled maintenance on Thursday (27 August) beginning at 17:00 ET. We apologize for any inconvenience this may cause. Thank you for your patience as we improve our services.

If you need assistance, Customer Service can be reached at +1 202.416.1907 (Worldwide) +1 800.766.4672 (US/Canada) or by emailing us at custserv@optica.org. Customer Service is available from 08:30 to 18:00 ET, Monday through Friday.

Letter of Invitation Request Form

The visa invitation letter will be sent as a .pdf document. Please be sure your email can accept large attachments.

Allow up to 15 business days for your visa invitation letter to be processed. If you do not receive your visa invitation letter within this time period, check your email spam folder. If it is not found, please contact us for assistance.

Avoid using any accent marks when filling out your application. Doing so will delay processing.

Individuals requiring letters of invitation to obtain travel visas for all 2025 Congress and Topical events can complete the online request form.

Please select the meeting you wish to attend.

Date of Birth

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