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Updated: Aug 4, 2026
Spatio-Temporal In Vivo Imaging of Ocular Drug Delivery Systems using Fiberoptic Confocal Laser Microendoscopy
Published on: September 27, 2021
Recent developments in chemotherapy of ocular diseases
1Department of Ophthalmology, University of California, Irvine.
Abstract:
The profile of organisms responsible for ocular infections has changed over the past few decades. Although nonresistant and resistant staphylococci still lead the list, gram-negative, mixed infections and anaerobic organisms have become more evident. In spite of more potent and broader spectra antibiotics, resistant organisms still emerge. The therapy of intraocular infections requires an awareness of the latest antibiotics, particularly their advantages, limitations, toxicities, and administration. Iontophoresis through the sclera overlying the pars planum area with small diameter applicators may offer another route of administration which may reduce or eliminate the value of direct intravitreal injections of antibiotics. Reduction of the harmful effects of endotoxins of organismal origin might minimize the adverse effects of intraocular infection, particularly after gram-negative invasion. The choice of antibiotic may influence the quantities of endotoxins released.
Insights
Organisms causing ocular infections are evolving, with resistant strains emerging despite advanced antibiotics. New administration routes like iontophoresis and understanding endotoxin effects are crucial for effective intraocular infection therapy.
Area of Science:
- Ophthalmology
- Infectious Diseases
- Microbiology
Background:
- The spectrum of causative agents in ocular infections has shifted, with increasing prevalence of gram-negative, mixed, and anaerobic organisms alongside staphylococci.
- Antibiotic resistance remains a significant challenge in treating intraocular infections, necessitating continuous evaluation of therapeutic strategies.
Purpose of the Study:
- To review the changing landscape of ocular pathogens and discuss current therapeutic approaches for intraocular infections.
- To explore novel antibiotic administration methods and the role of endotoxins in infection pathogenesis and treatment.
Main Methods:
- Literature review of recent studies on ocular infections, antibiotic resistance, and novel drug delivery systems.
- Analysis of the impact of different antibiotics on endotoxin release and subsequent intraocular inflammation.
Main Results:
- Emergence of resistant bacterial strains, including gram-negative organisms, poses a growing threat to ocular health.
- Iontophoresis presents a potential alternative route for antibiotic delivery, possibly reducing the need for intravitreal injections.
- Antibiotic selection can influence endotoxin release, impacting the management of severe intraocular infections.
Conclusions:
- Effective management of intraocular infections requires a thorough understanding of evolving microbial profiles and antibiotic resistance patterns.
- Novel drug delivery systems and strategies to mitigate endotoxin-induced damage are essential for improving patient outcomes.
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