Adaptica 2WIN-S - Page 156

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The images represent from top to bottom:
- both eyes open
- right eye open, left eye covered
- right eye covered, left eye open
The covered eye is highlighted by a light blue square.
The cloud of points in each image graphically reports each individual corneal reflex collected
during the exam.
The red marker point in the mean of each distribution is the average position of the corneal
reflexes.
Note that the operator can switch between this description (barycentral fixation) to the simple
pictures of the pupils just pressing the EYE button on the 2WIN.
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 threshold value (mm) selected in the settings (Menu >
Functions > 2WIN Applications > Corneal Reflexes > Options > Threshold), the output is
"ORTHO".
When a manifest asymmetry of the corneal reflexes is detected without cover test the output
is ET: esotropia; XT: exotropia.
When an asymmetry of the corneal reflexes appears only under infrared cover test the
output is EP: esophoria; XP: exophoria.
If a vertical deviation is present the output follows the same rules above exposed (HT:
hypertropia; IT: ipotropia; HP: hyperphoria; IP: ipophoria.
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 an evaluation.
The angle of deviation can be expressed either in prism diopter (PD) or in degrees (°): to
change Notation Menu > Functions > 2WIN Applications > Corneal Reflexes > Options
> Notation). K angles values are displayed on the bottom of the auxiliary window.
Please note that cover test can be done both with an infrared occluder or with
a conventional occluder. However, phorias can be detected and measured
only with the infrared occluder.