Visa Information

Customs Information for Entry to Lithuania

Make sure to carry proper identification and documents while traveling to the congress. Optica strongly encourages you to apply for any additional documentation (i.e., visa) no later than 6 months prior to the event, as the application process can be lengthy.

Letters of Invitation

Letters of Invitation are available as part of the registration process. Registrants will have the ability to complete the Letter of Invitation request process during registration. Upon completion of registration and the Letter of Invitation request, the Letter of Invitation will be provided as a downloadable PDF in a separate email.

Please note: Letters of Invitation are non-transferable. Optica will not edit, update, or make modifications to a completed Letter of Invitation.

Important Information Regarding Letters of Invitation:

• The registrant’s name must exactly match the name as it appears on their passport. Differences between the name on a passport and the name on a Letter of Invitation or other visa documentation may result in delays or denial of a visa.
• Each individual requesting a Letter of Invitation must complete a separate request.
• Letters of Invitation will be sent in PDF format to the email address provided during registration.

Visa Planning and Responsibility:

If you are not a U.S. citizen and plan to attend an event in the United States, advance planning is strongly recommended. Citizens of certain countries may require a visa to enter the United States. Registrants are responsible for determining their visa requirements and allowing sufficient time to complete the visa application process.

The Letter of Invitation generated through the registration process is intended for the registrant to print and submit directly as part of their official visa application. Optica does not submit visa applications or contact U.S. embassies or consulates on behalf of registrants.

Optica cannot expedite, influence, or otherwise intervene in visa decisions. Issuance of a Letter of Invitation does not guarantee that a visa will be issued or that the registrant will be permitted to enter the United States. Registrants are responsible for obtaining the appropriate visa and meeting all U.S. entry requirements before traveling.