How Do I Know If My Contact Lens Is Inside Out?

So you are a contact lens wearer and you start to recognize that “something’s not right here” feeling.  You put a lens in and it just doesn’t feel as comfortable as usual. You remove it and examine it for flaws or debris. Finding nothing, you are led to only one other conclusion: maybe it’s inside out!

I’ll admit, sometimes it’s just really hard to know if the lens is in backwards.  You take a look at the lens on your finger and it seems okay.  But, then you turn it inside out and it seems okay that way too.  How can you tell?

I asked my optician and there are a few easy ways to tell!

Look From The Side

The first is to examine the lens from the side.  Put the contact on your index finger with the edge pointed up and examine the lens from the side.  You should notice a perfect cup shape if it’s correct.  Though contacts are pliable enough to bend inside out, when the lens is flipped you’ll notice it looks more like a bowl with a rim rather than a borderless cup.

Do The Taco Test

The second way is what some call the “taco test.”  To conduct this examination you put your contact lens between your thumb and index finger, pinching it gently so the edge is free.  If the edge points up like a taco then it’s correct, but if it bends back, then it’s probably inside out.

Look For Markings

One final way you can check your lens is to look for any codes or coloring the manufacturer put into the lens.  Some lenses have what is called a “handling tint” in them, where a color that extends to the outer rim of the lens will look different when examined inside out versus right.  Other lenses may have letters or sequential numbers or even a brand name laser-burned onto them so you can test that your lens is right if you can read the word, code, or numbers in order.

Be sure to keep your hands very clean as you work with your lenses and always use a lot of saline solution to keep them moist and clean as you examine them.  If you are still struggling to get your lens to feel right after you are sure they are on correctly, go visit your optometrist at your closest America’s Best and ask him or her for a contact lens exam, to make sure there’s not a bigger problem.

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