Ask the patient the following question:
“Look at the test and tell me if the characters appear darker to you or more contrasted on the red
background, on the green background or if they seem identical to you
.”
If the answer is:
- darker on the red background
add -0.25 R
*
to the value of the sphere. Either:
•
On the console keyboard, by pressing on the key " - ".
•
On the console keyboard, by turning the central button clockwise
*
.
> Start the test again until you obtain the equal blackness for the characters on the red background
and the green background or you achieve the preference for the green background.
- darker on the green background
add +0.25 R
*
to the value of the sphere. Either:
•
On the console keyboard, by pressing on the key “+”.
>
>
2
U
SER
MANUAL
> IV. P
ERFORMANCE
OF
SPECIFIC
TESTS
DURING
A
REFRACTION
EXAMINATION
53
Vision-R 800 - Essilor automatic phoropter > V1 - 12-2018
Содержание Vision-R 800
Страница 1: ...www essilor instruments com User manual...
Страница 4: ...I INTRODUCTION...
Страница 8: ...II INSTRUMENT...
Страница 17: ...III BASIC SETTINGS FOR PERFORMING AN EXAMINATION...
Страница 36: ...IV PERFORMANCE OF SPECIFIC TESTS DURING A REFRACTION EXAMINATION...
Страница 61: ...V INSTRUMENT SETTINGS...
Страница 73: ...VI BREAKDOWN SERVICE...
Страница 75: ...VII TECHNICAL DATA...
Страница 78: ...VIII GENERAL WARNINGS...
Страница 87: ...IX QR CODE...
Страница 91: ...Essilor International 147 rue de Paris 94220 Charenton le Pont France www essilor com...
