In Vitro Videographic Comparison of Argon and Nd:YAG Laser Iridotomy
| Autor: | Dyson Hickingbotham, D. B. Chandler, Bruce E. Prum, M. Bruce Shields, Steven R. Shields |
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| Rok vydání: | 1991 |
| Předmět: |
Materials science
genetic structures Video Recording Iris chemistry.chemical_element Neodymium law.invention Optics law Humans Iris pigment epithelium Pigment Epithelium of Eye Video recording Argon business.industry Single pulse Laser eye diseases Ophthalmology surgical procedures operative chemistry Laser peripheral iridotomy Nd:YAG laser Laser Therapy sense organs business |
| Zdroj: | American Journal of Ophthalmology. 111:589-594 |
| ISSN: | 0002-9394 |
| DOI: | 10.1016/s0002-9394(14)73704-3 |
| Popis: | We used an in vitro technique with high-magnification video recording to evaluate from the posterior side of the iris the immediate sequence of events during argon and Nd:YAG laser peripheral iridotomy. The observed effects differed strikingly. The argon laser caused a gradual mounding up of iris pigment epithelium with each successive energy application before final penetration. This effect was reduced but not eliminated with higher power levels. The Nd:YAG laser caused complete disruption and dispersal of the pigment epithelium with a single pulse of energy. Additionally, a multiple focal point configuration of the Nd:YAG laser was observed to produce a significantly larger iridotomy than a single focal point configuration for comparable energy settings. These observations may in part explain the observed clinical advantage of the Nd:YAG laser over the argon laser for creation of a patent iridotomy. |
| Databáze: | OpenAIRE |
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