VX90 - User Manual
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3. Measurement of part around cornea
The direction of part around cornea which is measure at present is to be indicated at the bottom
left of measurement mode indication. Four boxes are to be indicated in INF, SUP, NAS, TEMP side
of Mire ring. Each box indicates the proceeding state of measurement on part around cornea. If
there is the measured result
around part of cornea where the box is located, the inside of box is to be full with color: In case
of no result, the box is to be indicated as an empty box. The relevant box indicated at the part
around cornea which is measured now is to flicker.
Direction of part around cornea:
- Superior (SUP): Upside from corneal center
- Inferior (INF): Downside from corneal center
- Temple (TEM): To the temple of examinee from corneal center
- Nasal (NAS): To the nose of examinee from corneal center
4. Sequence to measure the part around cornea
Measure it following the sequence of TEM -> SUP -> NAS -> INF In case that the measurement in
the direction of part around cornea becomes difficult, the direction lamp (guidance LED light) is
to radiate in order to draw the examinee’s sight around Mire ring actually. After the examiner shall
ask the examinee to look at the light of direction lamp, then he or she can perform the
measurement by adjusting the focus of Mire ring.
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