Related Experiment Videos
Abnormal electroretinogram and abnormal electrooculogram after lightning-induced ocular injury
Chun-Ju Lin1, Chang-Hao Yang, Chung-May Yang
1Department of Ophthalmology, National Taiwan University Hospital, Taipei, Taiwan.
American Journal of Ophthalmology
|April 5, 2002
Summary
This case report details abnormal electrooculogram and electroretinogram findings in a patient with lightning-induced ocular injury. These tests revealed reduced retinal function in the affected eye, persisting even after cataract surgery.
Area of Science:
- Ophthalmology
- Neuro-ophthalmology
- Electrophysiology
Background:
- Lightning strikes are rare causes of ocular trauma.
- Ocular injuries from lightning can lead to significant visual impairment.
Observation:
- A 39-year-old male sustained a lightning strike to the forehead.
- Ophthalmic examination revealed decreased visual acuity, corneal issues, iritis, and macular defects in the left eye.
- Electrooculogram (EOG) and electroretinogram (ERG) demonstrated reduced amplitudes in the left eye.
Findings:
- The electrooculogram showed a diminished Arden ratio (1.52) in the left eye compared to the right (2.04).
- Electroretinogram revealed reduced scotopic and photopic b-wave amplitudes in the left eye.
- These electrophysiological abnormalities persisted post-cataract surgery.
Implications:
- This is the first documented case of abnormal EOG and ERG following lightning-induced ocular injury.
- Electrophysiological testing is crucial for assessing retinal function after lightning trauma.
- Lightning-induced retinal dysfunction may be long-lasting and requires further investigation.