IOLMaster — Technical Specifications.

Surrounding field illumination/ WTW determination:

Source Wavelength Delivered power

LED 880 nm < 100µW

Axial length measurement:

Source Wavelength Max. power for measurement Max. power for alignment Measuring time individual meas. Pulse width Number possible individual meas. Laser class Embedded (not accessible)

Semiconductor diode laser (MMLD) 780 nm 450 µW 80 µW 0.5 s 20 per eye and day 1 (DIN EN 60825-1:2003) 3B

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

"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.

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

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

The spectrally assessed photochemical radiation densities L_B and L_A are a measure of the possibility of photochemical damage of the retina through light. L_B represents the measure for the phakic eye, L_A represents the measure for the aphakic eye or for the eyes of very young children. Readings of L_B and L_A 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.