Related Experiment Videos
[Transient blindness after subconjunctival anesthesia for diode laser cyclophotocoagulation].
T Schlote1, N Freudenthaler, J von Eicken
1Univ.-Augenklinik, Abteilung I, Schleichstr. 12, 72076 Tübingen.
Klinische Monatsblatter Fur Augenheilkunde
|January 9, 2001
Summary
Subconjunctival anesthesia, typically safe for optic nerves, can cause temporary blindness in patients with advanced optic neuropathy. This rare complication resolves within hours.
Area of Science:
- Ophthalmology
- Anesthesiology
Background:
- Retrobulbar and parabulbar anesthesia pose risks to optic nerve function, particularly in patients with optic neuropathy.
- Subconjunctival anesthesia is generally considered safer for the optic nerve.
Observation:
- Two patients with advanced refractory glaucoma experienced transient amaurosis (blindness) after subconjunctival anesthesia with mepivacaine during diode laser cyclophotocoagulation.
- The vision loss was fully reversible within 2 to 3 hours, with no signs of vascular occlusion on fundus examination.
Findings:
- Subconjunctival anesthesia, despite its usual safety profile, can lead to temporary vision loss in eyes with compromised optic nerves.
- This adverse event, though rare, highlights a potential risk associated with subconjunctival anesthesia in specific patient populations.
Implications:
- Ophthalmologists should be aware of the potential for transient amaurosis following subconjunctival anesthesia in patients with advanced optic neuropathy.
- Careful patient selection and consideration of anesthetic techniques are crucial in managing glaucoma patients with pre-existing optic nerve damage.