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Carl Zeiss Meditec IOL Master
Cataract Surgery Arizona

IOLMaster — Technical Specifications.

Basic Device
Dimensions (footprint)

Height

Weight
  390 mm x 300 mm

max. 610 mm (headrest)

approx. 18 kg
Cataract Surgery Arizona
Rated voltage; frequency
Cataract Surgery Arizonabasic device
 
100 … 240 V AC (±10%); 50 / 60 Hz
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Power consumption
Cataract Surgery Arizonabasic unit
 
90 VA
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Earth conductor

Protection class
Protection type
Device type
  Device should be connected only to sockets with an intact earth conductor
I
IP 20
B (DIN EN 6061-1)

Power Isolation Transformer
Rated voltage, frequency   100 … 127V AC (±10%); 60 HZ
or 220 … 240 V AC (±10%); 50 Hz
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Power consumption   max. 115 VA (Total power consumption of connected external devices)
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Fuses   2 x T3.15 A H 250 V 5x20 IEC 60127 for 100 … 127 V AC
2 x T1.6 A H 250 V 5x20 IEC 60127 for 220 … 240 V AC

Ambient Conditions for Intended Use
  Temperature   10 … 30 °C
  Relative humidity   30 … 75% non-condensing
  Atmospheric pressure   800 … 1060 hPa

Storage Environment
  Temperature   -10 … +55 °C
  Relative humidity   10 … 95% (no condensation)
  Atmospheric pressure   700 … 1060 hPa

Ambient Conditions for Storage and Transport
(in original packaging)
  Temperature   -10 … +70 °C
  Relative humidity   10 … 95% (no condensation)
  Atmospheric pressure   500 … 1060 hPa

Measuring Range
  Axial length
    Area
    Resolution of display
 
14 … 40 mm
0.01 mm

  Keratometer
    Area
    Resolution of display
 
5 … 10 mm
0.01 mm

  Anterior chamber depth
    Area
    Resolution of display
 
1.5 … 6.5 mm
0.01 mm

  White To White
    Area
    Resolution of display
 
8 … 16 mm
0.1 mm


Cataract Surgery Arizona
Comparison / Reproducibility
Comparison results of IOL Master versus
conventional measurements at the human eye*


Axial length*

Corneal curvature**

Anterior chamber depth*
Mean value:

-0.03 mm

-0.01 mm

+0.12 mm
Standard deviation:

± 0.21 mm

± 0.06 mm

± 0.18 mm
Cataract Surgery Arizona
IOLMaster reproducibility***



Axial length

Corneal curvature

Anterior chamber depth


Relative to standard deviation in human eye

± 0.0256 mm

± 0.0129 mm

± 0.0334 mm
*

**

***



1


2
In comparison to precision immersion ultrasound instrument1

In comparison to the manual keratometer1

Standard deviation (basic calculated simple standard deviation)2


acc. to abstract "First experiences with a New Optical Biometry System" by B.A.M. Lege, W. Haigis

acc. to "Reproducibility of Measurement in Optical Biometry: Intraobserver and Interobserver Variability" by A. Vogel, B. Dick
Optical Radiation

Surrounding field illumination/ WTW determination:

Source
Cataract Surgery ArizonaWavelength
Cataract Surgery ArizonaDelivered power
  LED
880 nm
< 100µW
Cataract Surgery Arizona

Axial length measurement:

Source
Cataract Surgery ArizonaWavelength
Cataract Surgery ArizonaMax. power for measurement
Cataract Surgery ArizonaMax. power for alignment
Cataract Surgery ArizonaMeasuring time individual meas.
Cataract Surgery ArizonaPulse width
Cataract Surgery ArizonaNumber possible individual meas.
Cataract Surgery ArizonaLaser class
Cataract Surgery ArizonaEmbedded (not accessible)
  Semiconductor diode laser (MMLD)
780 nm
450 µW
80 µW

0.5 s
20 per eye and day
1
3B
Cataract Surgery Arizona
Fixation light for keratometer and anterior chamber
depth measurement and WTW determination

  Source
Cataract Surgery ArizonaWavelength
Cataract Surgery ArizonaDelivered power Cataract Surgery Arizona
  LED
590 nm
< 1 µW
Cataract Surgery Arizona
Illumination for keratometer measurement

  Source
Cataract Surgery ArizonaWavelength
Cataract Surgery ArizonaDelivered power Cataract Surgery Arizona
  LED
880 nm
< 50 µW
Cataract Surgery Arizona
Slit illumination for anterior chamber depth measurement, integral irradiance

  UV (300 … 400 nm)
IR (700 … 1100 nm)
  0.00087 mW cm-2
0.04 mW cm-2
(in spectral range of 860-110 nm no detectable emission from light source)
122.8 W (m2 sr)-1
125.5 W (m2 sr)-1
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Spectral Irradiance

Spectral irradiance of slit illumination (white LED) determined in optical axis (0°) and at an angle of 33° –

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"Optical axis" or "0°" corresponds to the direct view into the illuminating projector. 33° is the angle for the intended use in anterior chamber depth measurement.

 

Spectrally assessed photochemical radiation densities:

Photochemical radiation density of light source (white LED - slit illumination) for the phakic eye L B=122.8 W/(m2 sr)

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Photochemical radiation density of a light source (white LED - slit illumination) for the aphakic eye L A=125.5 W/(m2 sr)

Cataract Surgery Arizona

The spectrally assessed photochemical radiation densities LB and LA are a measure of the possibility of photochemical damage of the retina through light. LB represents the measure for the phakic eye, LA represents the measure for the aphakic eye or for the eyes of very young children. Readings of LB and LA more than 800 W(m2sr)1 are considered high. The radiation dose of the retina for a photochemical risk is calculated as the product of radiation density and exposure time.

The recommended radiation dose is based on calculations of the American Conference of Governmental and Industrial Hygienists (ACGIH) Threshold Limit Values for Chemical Substances and Physical Agents (Edition: 1995-1996).

The measured photometric values of the IOLMaster are far below the levels that are regarded as high. Thus, the risk of damage through optical radiation is extremely low. Nevertheless, anterior chamber depth measurement with the IOLMaster should be limited to the time absolutely necessary for the diagnosis. The risk of damage may be higher, if fundus photography of the patient to be examined has been taken within the last 24 hours.

Technical details and delivery package subject to change.