Zeiss humphrey HFA II-i series, Руководство по обслуживанию на месте

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FA2i-012 Page 9
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Forehead Rest and Visor Installation
The Installation of a Forehead Rest and Visor (shield) prevents patient visibility of the illuminated
yellow filter assembly during Blue-Yellow testing. Without extending the visor during Blue-Yellow
testing, a patient is more likely to be distracted by the bright yellow light at the top of the bowl,
thus increasing fixation loss.
NOTE: Prior to removing the forehead rest, set the chinrest and the forehead rest horizontal lead screw nuts both to
the same relative position (check for the same amount of thread showing on the same side of the lead screws).
1)
Remove the existing forehead rest from the instrument front cover (see Figure 5). If the
existing forehead rest is in good condition, it can be reused, otherwise, use the new forehead
rest. Install the forehead rest and visor as shown.
2) Don't forget to apply a small amount of grease (Rheolube 362, P/N 08780) to the visor as
shown in Figure 5.
3) Once the new forehead rest has been installed, check that the center line on both the
chinrest and forehead rest are properly aligned. (Refer to Figure 6.)