Courtesy of topazarbell
Contact lenses are designed to float on your iris. Contact
lenses do not stick to your eyes but keep floating every time you blink.
Therefore, floating of circle contacts is considered healthy & normal.
Usually, floating does not interfere with vision. However, sometimes depending
on the design; contact lens movement may create hindrance in maintaining crisp
vision. If you are suspicious about your contact lenses floating way too much,
check by your doctor as it may be a sign of “astigmatism”. Healthy floating of
circle lenses depends upon the following factors:
Improper Fitting
If contact lenses do not fit your eyes properly they stay
loose due to which they can fall off or get trapped in the eyelid. The normal
base curve values ranges between 8.00 to 10.00 mm. Circle lenses with 8.6mm fit
best to most of the people. Contacts with too tight base curves can block
oxygen permeation.
Blinking
Blinking causes circle lenses to move several millimeters
every time a person blinks. Due to blinking circle lenses are slightly
decentered, but within fraction of seconds they relocate themselves without
even letting you realize.
Tears
Tears facilitate contact lens floating. Tears help keeping
your eyes and lenses moist that enables easy movement. This also helps better
oxygen transmission to all the areas of cornea through tears. When eyes become
dehydrated, floating is compromised that causes irritation & inflammation
of eyes.
Contact lenses are made to float on eyes. However, some
crazy reptilian designs that are 100% opaque may be very annoying when the slide
up and move. They create obstacles in seeing clearly as they shift a few
millimeters and float around. At Halloween, when you are nothing but a
dare-devil, observe caution whilst wearing such crazy lenses. You may trip over
in a dark alley due to poor sight. Other than few designs, floating of contact lenses must go unnoticed. If it is bothersome, get yourself an appointment from
a doctor.
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