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© HAAG‑STREIT AG, 3098 Koeniz, Switzerland ‑ HS‑Doc. no. 1500.7220055‑04150 – 2022 – 09
1.8.1 IOL constants derived using data from an immersion ul-
trasound biometer
If there are optimised IOL constants available from an immersion ultrasound biomet-
er, they may be used as a starting point for further optimisation of IOL calculation
with the Lenstar. Differences in IOL calculation may still occur, as the keratometry
data are collected in different ways. The 'User Group for Laser Interference Bio-
metry' (ULIB) at the University of Würzburg, Germany has published on its website a
manual explaining how to correct the effect of keratometry on the IOL constants.
Still, the IOL constants acquired in this way should only be used as a starting point
for further optimisation/personalisation.
1.8.2 IOL constants derived from data from a contact ultra-
sound biometer
If there are optimised IOL constants available based on data from a contact ultra-
sound biometer, they must be stringently recalculated for use with the Lenstar. The
'User Group for Laser Interference Biometry' (ULIB) at the University of Würzburg,
Germany has published on its website a manual explaining how to correct the effect
of ultrasound biometry and keratometry on the IOL constants. Constants acquired in
such a way should only be used as a starting point for further optimisation/personal-
isation.
1.9 Optical radiation
WARNING:
The light emitted from this device is potentially hazardous. The greater
the number of examinations, the greater is the risk of ocular damage.
Exposure to light from this device may exceed the recommended max-
imum exposure (RME) of 2.2 J/cm², if more than 100 individual meas-
urements are performed per day and per patient’s eye.
NOTE!
In accordance with EN 60825-1, the limiting values for class 1 lasers are
respected when the device is used in the defined manner. The device
complies with the limit values for risk group 1 in accordance with EN
62471 insofar as no more than 100 individual measurements are per-
formed per day and per patient’s eye with dilated pupil. If this limit value
of 100 individual measurements is exceeded, the patient’s eye may be
damaged by the white illumination. (Radiance 1800 Wm
-2
sr
-1
)
1.10 Disinfection
NOTE!
The applied parts of the device should be disinfected prior to every
measurement with a new patient. For more information, please refer to
the 'Maintenance' chapter.
1.11 Warranty and product liability
• Haag-Streit products must be used only for the purposes and in the manner de-
scribed in the documents distributed with the product.
• The product must be treated as described in the ‘Safety’ chapter. Improper
handling can damage the product. This would void all guarantee claims.
• Continued use of a damaged product may lead to personal injury. In such a
case, the manufacturer will not accept any liability.
• Haag-Streit does not grant any warranties, either expressed or implied, including
implied warranties of merchantability or fitness for a particular use.
• Haag-Streit expressly disclaims liability for incidental or consequential damage
resulting from the use of the product.
• This product is covered by a limited warranty granted by your seller.
• The optional T-Cone must be stored in its original dust cover and protected from
direct sunlight.
• For USA only: This product is covered by a limited warranty, which may be re-
viewed at www.haag-streit-usa.com.
1.12 Reporting obligation
NOTE!
Any serious incident that has occurred in relation to the device must be
reported to Haag-Streit and the competent authority of the Member
State in your country.
