22
From the start of the examination, the patient’s
pupils are circled in green (left figure)
. If the patient’s pupils
are circled in red the conditions for the measurement are not met and it shall be repeated (right figure). Pupil
diameters are displayed below the eyes’ image during the measurement phase.
If the patient is not positioned correctly during the examination, the rectangle that frames the eyes’ image
becomes red. In this case, the operator must ask to the patient to position himself/herself correctly.
The graph on the bottom of the window is the focusing meter. Maximizing the value of the graph will lead to
a better measurement: this is done automatically by the system.
A one-beep sound indicates that the measurement was taken, while a two-beep sound indicates that the
measurement has been correctly processed (this is an option selectable from the 2WIN inside 2WIN-S, in
Menu >
Measurement > Sound > Alerts > Ending Beep
).
If an error occurs during the measurement and the message appears, the causes could be the following:
•
Pupil/s too small or large.
•
High IR noise.
•
Unstable conditions of the data due to other eye problems.
•
Other unexpected facts.
If an error message persists after repeating the measurement several times, suggest the patient to have an
ocular examination with a licensed doctor.
For any problems during operation, please refer to
Chapter 17
–
Troubleshooting
.
At the end of the measurement, the following results are displayed (from top to bottom):
•
Spherical Equivalent (SE);
•
Refraction results (Sphere, Cylinder, and Axis);
•
Reliability index, calculated independently for right eye and for left eye;
•
Pupil size (PS).
Axis angles are expressed according to TABO system.
Содержание 2WIN-S
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