Essilor Instruments VISION-R 700, User Manual

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4
In case of preferred inversion between the top and bottom lines between the proposals:
Reduce the gap in the variance step to determine the exact bi-ocular equilibrium or
Keep the balance that gives preference to the dominant eye of the patient.
The dominant eye of the patient is determined during preliminary refraction tests.
Once bi-ocular equilibrium has been achieved, remove the +0.50 D (or +0.75 D) powers introduced at the
beginning of the test.
You can remove the power in two ways. By pressing [Bino] and then (once the "S" parameter is
selected):
1. By turning the center button clockwise twice (+0.50 D) or three times (-0.75 D).
2. By pressing the "-" key twice (-0.50 D) or three times (-0.75 D).
Following the bi-ocular equilibrium test, perform a binocular sphere check with the red/green test
(to be performed with both eyes open).
Notes
If the patient reports that the lines appear and disappear or shift horizontally or vertically, he is likely to
have a binocular vision problem (difficulty simultaneously viewing or merging images).
It is worthwhile to ask the question routinely at this stage of the test in order to ensure that the patient
has simultaneous vision in both eyes and that the patient’s vision is stable.
(*)
This information corresponds to the phoropter default settings. The sphere variation step is by default
0.25 D but can be adjusted in settings.
b. Near vision tests
Near vision tests to be preformed with rod and near point chart.
- identical letters on top and bottom lines
, bi-ocular equilibrium is achieved. Note this value. >
U
SER MANUAL
> P
ERFORMANCE OF TESTS DURING A REFRACTION EXAMINATION
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