What is the 3 1 1 rule for contacts?

The 3-1-1 Rule: What It Means for Contact Lens Wearers

Travelers who wear contact lenses often wonder how to pack their solution without hassle at airport security. The answer lies in the TSA’s 3-1-1 rule—a simple guideline designed to streamline carry-on screening.

The rule breaks down like this: Each liquid container must be 3.4 ounces (100 milliliters) or smaller, all containers must fit inside one quart-sized clear plastic bag, and each passenger is allowed only one such bag. This includes essentials like contact lens solution, which counts as a liquid under TSA regulations.

So yes, you can bring your contact solution in your carry-on—but only if it’s in a 3.4-ounce bottle or smaller and packed in your clear, quart-sized bag with other liquids like shampoo or toothpaste. Most travel-sized contact solution bottles fit this requirement perfectly. If you’re carrying a larger bottle, you’ll need to pack it in your checked luggage.

Some travelers carry an extra pair of contacts instead of extra solution—just in case. And while it might seem fussy, the 3-1-1 rule helps keep security lines moving and enhances safety measures at checkpoints.

Pro tip: Pack your clear bag where it’s easy to grab. You’ll need to pull it out and place it in a bin during screening. Doing so saves time and avoids last-minute rummaging.

The 3-1-1 rule isn’t just about compliance—it’s about convenience. For contact lens wearers, a little planning means clearer vision upon arrival, without any airport delays.