Nidek Medical RT-5100, Руководство оператора

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TEST METHOD Binocular Visual Function Test
 Stereo balance test
Use: To test prevalency of the eye
Chart: Stereo balance
Applicable model: SC Pola series G+
Auxiliary lens: Right eye 135º, left eye 45º, polarizing filters
Ideal appearance:
Right eye Left eye Binocular ideal
The upper and lower
triangles appear
closer than the central
circle.
1
Present the stereo balance chart.
Press .
The polarizing filters are set in the measuring windows (right eye 135º, left eye 45º).
2
Confirm that the upper and lower triangles appear to the patient to be closer.
The stereoparallax is 13’ 45” (when the refraction distance is 5 m and the PD value is 60
mm, the upper and lower triangles appear to be approximately 125 cm closer to the patient).
3
Press again.
The direction of the polarizing filters reverses (right eye 45º, left eye 135º).
4
Confirm that the upper and lower triangles appear to the patient to be farther away.
They appear to be approximately 250 cm away from the patient (when PD is 60 mm).
5
Check the displacement between the upper and lower triangles and the central circle.
Displacement of pop-out > Displacement of recession

Exophoria tendency
Displacement of pop-out < Displacement of recession

Esophoria tendency
Displacement of pop-out = Displacement of recession

Vertical phoria tendency
• In reference to the middle one lateral removed observation of the merged triangles until the
first (inside), second (thin) or rather third (outside) scale line means an prevalence of the
corresponding eye of 20%, 60% or rather 100%.
161221687130 承認済
Uncontrolled copy when printed.