International travel: Carry-on considerations
Before packing your carry-on, remember that TSA is USA only
A common mistake made by scleral lens users is, when planning what to take in a carry-on versus checked baggage, to rely on TSA rules even though they are traveling internationally.
TSA rules about liquid packaging in carry-on baggage apply only in the US. Outside the US, rules will vary from country to country.
International travelers who use scleral lenses sometimes have these items confiscated by security.
Purilens saline bottles, any size. (Alternative: Pack single-use vials only.)
Hydrogen peroxide solutions like Clear Care. (Alternative: travel size multi-purpose solution, subject to below.)
Any sized contact lens solution bottles and in some cases even vials, potentially. (You can travel with a couple of contact lens cases full of multi-purpose solution and keep bottles in checked baggage, if necessary.)
Transit only? Find out if any re-screening will apply
Another issue that can come up with international travel is to assume that only your home country and destination country rules matter. However, if you have a connecting flight in a 3rd country, there may be circumstances under which your carry-on baggage gets re-screened. You may want to check the rules in countries that you are transiting through.