Related Experiment Video
Updated: Jul 16, 2025
07:24
Intravitreal Injection and Quantitation of Infection Parameters in a Mouse Model of Bacterial Endophthalmitis
Published on: February 6, 2021
11.5K
Evaluation for endotoxin in intraocular materials used during phacoemulsification surgery using a recombinant factor
Taylor A Opgenorth1, Eryn L Opgenorth2, J Seth Eaton1
1Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin, USA.
Veterinary Ophthalmology
|September 22, 2023
Summary
Endotoxin was not found in cataract surgery materials, suggesting it may not cause post-operative fibrin webs. Further investigation into batch variability or other causes is needed for this common complication.
Area of Science:
- Ophthalmology
- Biochemistry
Background:
- Cataract surgery is the only treatment for cataract-induced blindness.
- Fibrin web formation is a known post-operative complication.
- The role of endotoxin in fibrin web formation is unclear.
Purpose of the Study:
- To investigate the presence of endotoxin in materials used during cataract surgery.
- To determine if endotoxin is a potential cause of post-operative fibrin web formation.
Main Methods:
- Collected and tested preservative-free epinephrine, heparin, viscoelastic devices, and intraocular lenses (IOLs).
- Used a kinetic chromogenic Limulus Amebocyte Lysate (LAL) test to quantify endotoxin levels.
- Incubated IOLs at 37°C for 48 hours to simulate intraocular conditions and re-tested.
Main Results:
- Endotoxin levels were below the limit of detection (0.05 EU/mL) in all tested samples.
- Simulated intraocular conditions did not increase endotoxin extraction from IOLs.
Conclusions:
- Endotoxin was not detected in any of the evaluated cataract surgery materials.
- The study suggests endotoxin is unlikely to be the cause of fibrin web formation post-cataract surgery.
- Episodic fibrin web occurrence may indicate batch-to-batch endotoxin variability or an alternative etiology.
