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How Do I Tell if my Lens
is Inside Out?
Generally there are two different ways to tell if your
lens is inside out:
1. The Taco Test; Place the lens between your thumb and
pointing finger. Gently roll your fingers together. If a
lens is NOT inside out the edges will flare in and curl
together (meeting the edge from the other side) like a
taco. If it is inside out, the edges will flare out, and
sometimes collapse on your finger surfaces.
2. Viewing Your Lens; Looking at your lens from a direct
side view, observe the very edge of the lens. If the very
edge of the lens appears sharp or pointed sideways, it is
inside out. If the very edge of the lens appears to "bowl
up," it is on your finger the correct way.
Also, Vistakon (Johnson & Johnson) has etched with a laser
(on its AcuVue2 and AcuVue Advance lenses) a "1 2 3" near
the edge of the lens. If you wear one of these lenses,
simply hold the lens on your finger above your head. If
you can see " 1 2 3", in the proper order, its on your
finger the correct way to put on properly.
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