Zeiss opmi lumera 700 User Manual

Also see for opmi lumera 700: Instructions for use User manual Basic instructions

Zeiss opmi lumera 700 User Manual Manual pdf 20 page image

Safety measures OPMI LUMERA® 700Version 3.0Page 20 G-30-1673-enExposure time to lightAccording to some publications, the eye should not be exposed to the lightsource longer than a few minutes. In all surgical cases, the retinal exposuretime to light depends on the type and duration of the procedure and possiblecase complications. It is therefore recommended in ophthalmic surgery tokeep the light intensity as low as possible, or to use a device which preventsthe light from entering through the patient's pupil. It is also recommended tomake sure that the patient's eye is not additionally exposed to the light of sur-rounding light sources.This problem has been solved by Carl Zeiss by the use of a retina protectiondevice that can be swung into the microscope's illumination beam path anda swing-in retina protection filter (blue barrier filter).Brightness adjustment The brightness of this device can be adjusted on a scale from 5% to 100%.Based on standard DIN EN ISO 15004-2:2007 there are maximum illuminationtimes for various illumination configurations. These values can be found ontable "Maximum radiation exposure time" (see page 22).With increasing age of the light source, the actual illumination intensity deliv-ered at the respective setting decreases (this is a normal property of thesystem).Phototoxic risk factors The microscope light source - like any bright light source - may present a po-tential hazard to the patient's eye both in the form of immediately visiblethermal damage to the retina as well as phototoxic chemical reactions whichmay lead to photoretinitis. The factors which play an important role in deter-mining the phototoxic risk are:– Lamp brightness– Spectral distribution of the light (UV and blue light is more dangerous thanlonger wavelengths)– Duration of direct exposure– Pupil size– Clarity of ocular media (infants and young children, for example, may beat a higher risk)– Condition of the eye: aphakic and pseudo-aphakic eyes with IOLs are at ahigher risk.– Previous exposure to bright light such as retinal photography, especiallywithin the last 24 hoursDuring cataract procedures, factors such as lenticular material, instruments