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Photic retinopathy from the operating room microscope. Study with filters.
1Department of Ophthalmology, Mayo Clinic, Mayo Medical School, Rochester, MN 55905.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|March 1, 1989
Summary
Visible light exposure from surgical microscopes can cause photic retinopathy, even when infrared and ultraviolet wavelengths are filtered out. This highlights the risk of visible light in operating rooms.
Area of Science:
- Ophthalmology
- Photobiology
- Medical Optics
Background:
- Photic retinopathy is a retinal injury caused by light exposure.
- Standard operating room microscopes emit light that could potentially cause retinal damage.
Observation:
- A patient's blind eye was exposed to microscope light filtered through infrared (IR) and later through combined ultraviolet (UV) and IR filters.
- Acute photic retinopathy lesions were produced in both exposure scenarios.
Findings:
- Exposure to microscope light filtered solely through an IR filter caused photic retinopathy.
- Even when both UV and IR light were blocked, the remaining visible spectrum light produced similar retinal lesions.
- The combined filters reduced light energy but did not prevent photic retinopathy.
Implications:
- Visible light spectrum, not just UV or IR, poses a significant risk for photic retinopathy during ophthalmic surgery.
- Surgeons should be aware of the potential for retinal damage from visible light emitted by surgical microscopes.
- Further research into light filtering technologies and safe light exposure limits is warranted to protect patients' vision.