Haag-Streit LENSTAR LS 900, Инструкция по эксплуатации

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DEUTSCH ENGLISH FRANÇAIS ITALIANO ESPAÑOL NEDERLANDS PORTUGUÊS SVENSKA DEUTSCH ENGLISH FRANÇAIS ITALIANO ESPAÑOL NEDERLANDS PORTUGUÊS SVENSKA
© HAAG‑STREIT AG, 3098 Koeniz, Switzerland ‑ HS‑Doc. no. 1500.7220055‑04150 – 2022 – 09
1.13 Description of symbols
Follow instruction for use
Read the instructions for use
attentively
General warning, read the ac-
companying documentation
European certificate of con-
formity
Date of manufacture Manufacturer
Haag-Streit reference number Serial number
Trademark of the manufacturer
Haag-Streit AG
Notes on disposal, see the 'Dis-
posal' chapter
Listed European Authorized
Representative
Medical Device
Testsymbol of TÜV Rheinland
with approval for INMETRO
Brasil
MET Listed Mark with approval
for USA and Canada
Alternating current Direct current
Housing protection
2 Intended purpose / intended use
The LENSTAR LS 900 is a non-invasive, non-contact OLCR (optical low-coherence
reflectometry) biometer used for obtaining ocular measurements and performing cal-
culations to assist in the determination of the appropriate power and type of IOL (in-
traocular lens) for implantation after removal of the natural crystalline lens. The
LS 900 measures:
• Axial eye length
• Corneal thickness
• Anterior chamber depth
• Aqueous depth
• Lens thickness
• Corneal curvature
• Radii for flat and steep meridian
• Axis of the flat meridian
• White-to-white distance
• Pupil diameter
2.1 Device description
The Lenstar LS 900 is a non-contact device for measurement of biometrical para-
meters of the eye, aimed to assist the calculation of intraocular lenses (IOLs) before
intraocular lens implantation. The most common application is the preparation of
cataract surgery.
This device uses OLCR (optical low-coherence reflectometry), an interferometric
method to measure intraocular axial distances. Furthermore, it uses digital photo-
graphy of the anterior section of the eye to measure pupil size and location and the
white-to-white distance of the eye. In conjunction with a specific illumination pattern,
the same photographic unit is used to measure the corneal curvature – this meas-
urement is known as keratometry.
A supplementary measurement mode is available with the T-cone configuration,
which allows measuring corneal curvature data on more locations than otherwise
possible. This corneal topography measurement mode uses a Placido cone, a cone-
shaped attachment to illuminate the cornea with a modified (ring-shaped) light pat-
tern and provides adapted analysis functionality in the device software. An optional
automated positioning system (APS) is available for Lenstar LS 900, providing hy-
brid positioning of the measurement head.