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Endoilluminators: evaluation of potential retinal hazards
Sharon A Miller1, Robert J Landry, Gordon A Byrnes
1Center for Devices and Radiological Health, US Food and Drug Administration, 9200 Corporate Boulevard, Rockville, Maryland 20850-0001, USA. sym@cdrh.fda.gov
Applied Optics
|March 30, 2004
Summary
This study evaluated retinal photic injury risks from endoilluminators. Calculated exposure times to reach the threshold limit value (TLV) were shorter than typical surgery durations, highlighting potential risks.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Photobiology
Background:
- Endoilluminators are crucial in ophthalmic surgery.
- Concerns exist regarding potential retinal photic injury from intense light exposure during procedures.
Purpose of the Study:
- To assess the risk of retinal photic injury associated with endoilluminator use.
- To quantify exposure limits and evaluate mitigation strategies.
Main Methods:
- Spectral irradiance of endoilluminators was measured.
- Irradiance was weighted using the American Conference of Governmental Industrial Hygienists (ACGIH) aphakic action spectrum.
- Calculated time to threshold limit value (timeTLV) for various configurations.
Main Results:
- Calculated timeTLV ranged from 0.27 to 3.5 minutes, significantly less than typical surgical times.
- Short-wavelength cutoff filters substantially increased the timeTLV.
- Potential for retinal photic injury exists with current endoilluminator usage.
Conclusions:
- Endoilluminator use presents a risk of retinal photic injury.
- Short-wavelength cutoff filters are effective in mitigating this risk.
- Implementing exposure reduction techniques during surgery is recommended.