INSTRUCTIONS FOR USE
POLARIS | IFU312EN00
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Inferior tear meniscus
Most tears are collected in the inferior and superior tear meniscus. The
size of the tear meniscus formed on the eyelid borders provides, then,
useful information on the produced liquid volume.
The tear meniscus can be examined taking into account its height,
regularity and shape.
The luminous intensity of the device is calibrated so as not to cause
glare of the patient preventing reflex tearing.
Tear film stability and regularity
The device allows to evaluate the stability and the regularity of the
tears film, through the measurement of the non-invasive break up
time (NIBUT). The image reflected by the tear film surface enables to
observe and evaluate the regularity of the tear film on the patient's
eye surface and to measure the break up time (NIBUT).
The non-invasive break up time is the measurement, in seconds, of the
time between the last complete blinking and the appearance of the
film discontinuity on the tear film. The observed pre-rupture phase
indicates the tear film thinning time. These measurements can be
taken with or without contact lenses.
Corneal surface regularity
The device can also be used to assess the regularity of the corneal
surface. By inserting the specific grid inside the internal cylinder of the
device, a series of concentric rings is projected onto the cornea thus
performing a keratoscopy. A regular cornea will result in a reflected
image with a series of concentric rings, all at the same distance. Any
irregularities in the surface of the cornea will result in irregularities of
the reflected image. Closer rings correspond to areas of steeper curved
cornea, while more distance between rings correspond to flatter
cornea area.
The device must be used only by practitioners, within the limits of the
law and the regulations for the exercise of the profession.
The device can be used in combination with a PC and the application
software Phoenix.
System minimum requirements