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CR Exam Results
In the CR Measurement Result window three pairs of pupil images are displayed.
The images represent from top to bottom:
- Both eyes open
- Right eye open, Left eye covered
- Right eye covered, Left eye open
NOTE: The covered eye is highlighted by a grey square.
From the pupil images it is possible to identify the position of the corneal reflexes with
respect to the pupillary geometrical center.
When the position of the corneal reflexes, comparing the binocular test with the monocular
infrared cover test of each eye, is not significantly changing (that is when the barycenter
changes its position less than the 4DP threshold value) the output is ORTHO.
When a manifest asymmetry of the corneal reflexes is detected without cover test the output
is: ET (esotropia) or XT (exotropia).
When an asymmetry of the corneal reflexes appears only under infrared cover test the
output is: EP (esophoria) or XP (exophoria).
If a vertical deviation is present the output follows the same rules above exposed: HT
(hypertropia), IT (ipotropia), HP (hyperphoria), IP (ipophoria).
The angle of deviation is expressed in Prism Diopters.
The following picture gives a graphical representation of the possible exam outputs:
WARNING: the messages ET, XT, EP, XP, HT, IT, HP and IP shall not be
misunderstood as a diagnosis or a hint for diagnosis. For instance, a loss of
fixation by the patient during the exam could cause an asymmetry not related
to any pathology. The measurement shall in any case be used to refer the
patient to an eye care professional for further evaluation.
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