Related Experiment Videos
Falsely extinguished bright-flash electroretinogram. Its association with dense vitreous hemorrhage
Archives of Ophthalmology (Chicago, Ill. : 1960)
|September 1, 1982
Summary
Dense vitreous hemorrhages can cause nonrecordable electroretinograms. Vitrectomy surgery can restore useful vision and recordable electroretinograms, even with retinal abnormalities.
Area of Science:
- Ophthalmology
- Retinal diseases
- Electrophysiology
Background:
- Dense vitreous hemorrhages can obscure retinal function, leading to nonrecordable electroretinograms (ERGs).
- Vitrectomy is a surgical procedure to remove the vitreous humor, often performed for conditions like vitreous hemorrhage.
Observation:
- Three patients with dense vitreous hemorrhages presented with nonrecordable bright-flash ERGs before vitrectomy.
- No major retinal detachment was observed in these patients.
Findings:
- Following vitrectomy, all patients showed significant visual function improvement.
- Postoperative ERGs were recordable, though reduced in amplitude, indicating some residual retinal dysfunction.
- Increased light intensity was required to elicit ERGs post-operatively, suggesting altered retinal sensitivity.
Implications:
- Nonrecordable ERGs in the presence of vitreous hemorrhage do not necessarily indicate irreversible retinal damage.
- Vitrectomy can lead to functional recovery and improved ERG responses in select cases of vitreous hemorrhage.
- This suggests that vitrectomy may be beneficial even when preoperative electroretinography is nonrecordable.