Retrobulbar haemorrhage post sub-Tenons block: a case report.

Area of Science:

• Ophthalmology
• Ophthalmic Surgery

Background:

• Retrobulbar hemorrhage is a rare, sight-threatening complication.
• It can lead to orbital compartment syndrome and irreversible vision loss if not treated promptly.
• Hemorrhage following sub-Tenon's block is exceptionally rare, especially in patients without bleeding risks.

Purpose of the Study:

• To report a rare case of retrobulbar hemorrhage after sub-Tenon's block.
• To emphasize the importance of prompt diagnosis and management.
• To raise awareness of this potential complication.

Main Methods:

• Case report of a 75-year-old male.
• Sub-Tenon's block administered for encysted bleb needling.
• Emergency lateral canthotomy and cantholysis performed for orbital compartment syndrome.

Main Results:

• The patient developed acute retrobulbar hemorrhage immediately post-injection.
• Symptoms included severe ocular pain, restricted eye movements, and hypertension.
• Emergency intervention successfully resolved the compartment syndrome.

Conclusions:

• Retrobulbar hemorrhage can occur even without predisposing factors.
• Vigilance for this complication after sub-Tenon's block is essential.
• Timely intervention is critical for vision preservation.