Illustration showing how to check if your contact lens is inside out using the taco method

The taco test is a simple and effective way to determine if your contact lens is inside out

Place the lens on your fingertip
Gently pinch the lens between your thumb and finger as if folding a soft taco
Observe the edges
If the lens is correctly oriented the edges will fold inward naturally like a taco shell
If the lens is inside out the edges will flare outward and resist folding

This method is fast and reliable and helps prevent discomfort while wearing lenses