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[Potential laser hazards to bystanders during photocoagulation]
Nippon Ganka Gakkai Zasshi
|February 1, 1993
Summary
Reflected laser beams from ophthalmic lasers can pose a hazard to bystanders. Using laser-coated contact lenses significantly reduces reflected laser exposure, enhancing eye safety during procedures.
Area of Science:
- Ophthalmology
- Biomedical Optics
- Laser Safety
Context:
- Ophthalmic laser procedures utilize photocoagulators and indirect ophthalmoscopes.
- Bystander safety during these procedures requires evaluation of reflected laser hazards.
- Standard 514 nm laser wavelengths were employed for measurements.
Purpose:
- To measure reflected laser beam intensity from ophthalmic laser delivery systems.
- To assess potential eye hazards to bystanders from reflected laser light.
- To compare reflectivity of standard versus laser-coated Goldmann 3-mirror contact lenses.
Summary:
- Reflected laser beams from a 0.75 Watt binocular indirect ophthalmoscope system were hazardous at 1 meter from a whitish tile in an operating room setting.
- Reflected laser beams from a 0.3 Watt slit-lamp photocoagulator system at 40 cm from a non-laser-coated Goldmann 3-mirror contact lens exceeded exposure limits (2.66 mW/cm2).
- Using laser-coated lenses reduced this reflection by 85-90%, indicating a significant safety improvement.
Impact:
- Highlights the risk of reflected laser beams in ophthalmic surgery.
- Recommends the use of laser-coated contact lenses to mitigate reflected laser hazards.
- Emphasizes the importance of laser safety protocols for protecting both patients and operating room personnel.