Prior to traveling to Canada for MICCAI 2023, please review Citizenship and Immigration Canada's List of Countries Requiring a Visa for Entry to clarify your Visa requirements. The Conference Organizers recommend that if required, you apply for a visa as soon as your attendance is confirmed, as visa requests can often take months to process.
Citizens from countries other than the United States who do not need a visa to enter Canada will need to obtain an ELECTRONIC TRAVEL AUTHORIZATION (eTA) before flying to or transiting through Canada.
The eTA process is similar to that of the United States ESTA: travelers apply individually online here. Each individual must pay CAD $7 by Visa, Mastercard or American Express, and their eTA is valid for 5 years. Travel agents can apply for their clients, but they cannot charge a fee for this service. For more information about this new requirement, visit the eTA page for videos and fact sheets in multiple language.
Canada has introduced a new entry requirement, known as an eTA, for visa-exempt foreign nationals travelling to Canada by air. As of March 15, 2016, this entry requirement will become mandatory and travelers will need an eTA before they can board a flight to Canada. Exceptions include U.S. citizens and travelers with a valid visa. Entry requirements for other methods of travel (land, sea) have not changed.
http://www.cic.gc.ca/english/visit/visas.asp
http://www.cic.gc.ca/english/information/times/
For official instructions on visiting Canada and applying for a visa, please visit http://www.cic.gc.ca/english/visit/index.asp