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[Endocapsular cataract surgery using the excimer laser at 308 nm].
Fortschritte Der Ophthalmologie : Zeitschrift Der Deutschen Ophthalmologischen Gesellschaft
|January 1, 1989
Summary
Excimer laser cataract surgery, or phakoablation, shows promise for removing lens nuclei with less capsule damage. This technique requires 215 J energy and appears feasible for treating opaque lenses.
Area of Science:
- Ophthalmology
- Laser Surgery
- Biomedical Engineering
Context:
- Cataract surgery is a common procedure to restore vision.
- Current methods may have limitations in precision and tissue preservation.
- Novel techniques are needed to improve surgical outcomes.
Purpose:
- To evaluate the feasibility of endocapsular cataract surgery using an excimer laser at 308 nm.
- To determine the ablation thresholds for human lens nuclei and capsule.
- To assess the safety and efficacy of the developed prototype system.
Summary:
- Endocapsular cataract surgery (phakoablation) utilized an excimer laser (308 nm) with a quartz fiber in an irrigation/aspiration handpiece.
- Ablation thresholds were 0.5 J/cm² for lens nuclei and 1.5 J/cm² for the capsule.
- Successful in vitro surgery on autopsy eyes required approximately 30 minutes with minimal capsular damage.
Impact:
- Excimer laser phakoablation demonstrates feasibility for cataract removal.
- Low ablation threshold for lens nuclei suggests targeted tissue removal.
- Retinal UV exposure analysis indicates safety, provided the posterior capsule remains intact.