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.