Yes—and it matters more the higher your prescription is.
How to tell if your contact lense is inside out. If it’s right side up, the rim will create a perfect cup shape. The taco test is another way to tell whether your contact lens is inside out. Hold the lens up to a bright light.
Place your lens on the tip of your finger. Simply place the lens between your thumb and forefinger. If they touch completely, then the lens is right side out.
If the edges flare out and don't touch fully, then it's inside out. Put the contact on your index finger with the edge pointed up and examine the lens from the side. If the rim is turned.
Place the lens between your forefinger and thumb. If it is right side out, the edges. Hold the lens in the centre, firmly between.
Brisco will talk about how you can tell if you are putting your contact lenses in, right side in or inside out. Usually, this will take the form of a sequence of numbers and/or letters. For example, one brand has a “123” laser.
If the edges curve outward, then the contact is inside out. Put the lens on your finger tips and check the shape of the edge of the lens. Holding it near the centre, gently squeeze.