Two brands of eye drops sold in the US have been recalled but Health Canada has not yet reported any problems in this country. However, since these drops are over-the-counter products that may have been purchased while you were visiting the US this winter, I am posting this information just in case. Please see the Global News link below for more background.
Fire Chief J. Caldbeck
https://globalnews.ca/news/9575843/eye-drops-recall-vision-loss-blindness-death-us/