Essilor Instruments VISION-R 700, Руководство пользователя

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On the console keyboard, by turning the central button clockwise
(*)
.
> Start the test again until the patient sees the equal blackness for the characters on the red
background and the green background or the preference for the green background.
On the console keyboard, by pressing on the key “+”.
On the console keyboard, by turning the central button anticlockwise
(*)
.
> Start the test again until the patient sees the equal blackness for the characters on the red
background and the green background or the preference for the red background.
In the event of preferred red and green inversion between two sphere steps, retain the last values:
red for a patient with myopia
green
for a patient
with hypermetropia
Notes
To avoid the disturbing effects of the accommodation of the patient (which can make him prefer the red),
it is possible to:
ask the patient to lock on the green background before proceeding to the red/green comparison,
lightly blur by adding a power of +0.50 D in order to obtain a preference for the red and to then
clear it up until obtaining the balance between the red and the green.
Several successive preferred answers for the red can indicate that the patient unintentionally involves his
accommodation. This can occur in particular with young patients who can be sometimes appear short-
sighted by the excessive inclusion of their accommodation. It is thus important to make sure not to let it
result in a too concave (or negative) sphere value.
- darker on the green background add +0.25 D (*) to the value of the sphere. Either: >
- identical on the red background and the green background retain this sphere value. >
U
SER MANUAL
> P
ERFORMANCE OF TESTS DURING A REFRACTION EXAMINATION
51 Vision-R 700 - Essilor automatic phoropter > V1 - 09-2020