Related Experiment Videos
Trans-scleral application of a semiconductor diode laser
G A Peyman1, K S Naguib, D Gaasterland
1LSU Eye Center, Louisiana State University Medical Center School of Medicine, New Orleans 70112.
Lasers in Surgery and Medicine
|January 1, 1990
Summary
Transscleral diode laser treatment effectively destroyed ciliary body processes and achieved retinal photocoagulation in pigmented rabbit eyes. This method shows potential for ophthalmic procedures in pigmented eyes.
Area of Science:
- Ophthalmology
- Laser Medicine
- Veterinary Science
Background:
- The sclera presents a barrier to laser energy delivery in ophthalmic treatments.
- Pigmented eyes pose unique challenges for laser-based therapies due to light absorption.
Purpose of the Study:
- To evaluate the efficacy of transscleral diode laser application for ciliary body destruction and retinal photocoagulation in pigmented rabbit eyes.
- To determine optimal energy levels and exposure times for these procedures.
Main Methods:
- A 1W diode laser was delivered via a 200-micron fiberoptic light pipe through the sclera of pigmented rabbits.
- Varying energy levels (200-500 mW) and a 0.5-second exposure time were used.
- Histologic examination assessed acute lesions and scar formation.
Main Results:
- Ciliary body destruction was achieved at 300-400 mW.
- Retinal photocoagulation occurred at 200-500 mW.
- Histology confirmed thermal destruction of ciliary body processes and retina, with chorioretinal scar formation observed within 2-3 weeks.
Conclusions:
- Transscleral diode laser application is a viable method for ciliary body destruction in pigmented eyes.
- This technique can also be used for peripheral retinal coagulation in pigmented eyes.
- The study supports the potential use of transscleral diode laser for specific ophthalmic interventions in pigmented subjects.