Operator’s Manual 1-63
110017276EN Rev. B
1 Getting Started
Time dependency
The risk of developing photoretinitis depends not only on the intensity of light, but also on the duration of the
exposure, i.e. the total dose of intensity times duration must be limited to prevent damage. This applies to an
uninterrupted beam at a particular point on the retina. Normal surgical procedures do not involve exposure to a
single point on the retina and movement of the light guide would be expected to extend the time before which
photoretinitis might occur.
CAUTION:
The light emitted from this instrument is potentially hazardous (see third note below). The
longer the duration of exposure, the greater the risk of ocular damage. Exposure to light from
this instrument when operated at various outputs may exceed the safety guideline after the
times listed in the table below when used with a Lomb focal type probe:
Time to exceed 10 J/cm
2
weighted radiant exposure guideline, in minutes, at a working distance of 15 mm.
Lamp
Filter:
Mercury
Xenon
None
Amber
Green
Yellow
None
Amber
Green
Yellow
Setting:
100%
36
>120
42
54
18
>120
20
26
60%
61
>120
70
90
30
>120
34
44
50%
73
>120
83
108
36
>120
41
53
40%
Default
Setting
91
>120
104
>120
45
>120
51
66
30%
>120
>120
>120
>120
60
>120
68
88
20%
>120
>120
>120
>120
90
>120
102
> 120
10%
>120
>120
>120
>120
>120
>120
>120
>120
Note:
The exposure from all light sources is cumulative and additive.
Note:
If the intensity of any of the light sources is reduced to 50% of the maximum intensity, the
exposure time for that light source to reach the exposure guideline is doubled. This linear
relationship can be used to determine the time to reach the exposure guideline for the
combination of light sources at various intensity settings.
Note:
The ISO 15004-2:2007 weighted radiant exposure guideline is 10 J/cm2.
Note:
When using two lamps simultaneously at arbitrary settings, the formula for calculating the
time to reach the exposure threshold with both lamps running is:
tc = 1/[(s1 / t1,100)+(s2 / t2,100)] where:
tc = time to reach the threshold for the combination of the two lamps
Summary of Contents for STELLARIS PC
Page 1: ...Operator s Manual ...
Page 78: ...1 68 Operator s Manual 110017276EN Rev B 1 Getting Started ...
Page 190: ...3 36 Operator s Manual 110017276EN Rev B 3 ...
Page 244: ...4 54 Operator s Manual 110017276EN Rev B 4 ...
Page 284: ...6 26 Operator s Manual 110017276EN Rev B 6 Troubleshooting ...
Page 329: ...Preface ...
Page 330: ...Table of Contents ...
Page 331: ...Getting Started ...
Page 332: ...User Interface ...
Page 333: ...Customizing Your System ...
Page 334: ...Detailed Reference ...
Page 335: ...Cleaning and Sterilization ...
Page 336: ...Troubleshooting ...
Page 337: ...Service and Warranty ...
Page 338: ...Specifications ...
Page 339: ...Glossary ...
Page 340: ...Index ...
Page 341: ...Preface ...
Page 342: ...Table of Contents ...
Page 343: ...Getting Started ...
Page 344: ...User Interface ...
Page 345: ...Customizing Your System ...
Page 346: ...Detailed Reference ...
Page 347: ...Cleaning and Sterilization ...
Page 348: ...Troubleshooting ...
Page 349: ...Service and Warranty ...
Page 350: ...Specifications ...
Page 351: ...Glossary ...
Page 352: ...Index ...