In Vitro Videographic Comparison of Argon and Nd:YAG Laser Iridotomy
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 pi...
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| Veröffentlicht in: | American journal of ophthalmology 1991-05, Vol.111 (5), p.589-594 |
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| container_end_page | 594 |
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| container_issue | 5 |
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| container_title | American journal of ophthalmology |
| container_volume | 111 |
| creator | Prum, Bruce E. Shields, Steven R. Shields, M. Bruce Hickingbotham, Dyson Chandler, David B. |
| description | 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. |
| doi_str_mv | 10.1016/S0002-9394(14)73704-3 |
| format | Article |
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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.</description><subject>Biological and medical sciences</subject><subject>Humans</subject><subject>Iris - pathology</subject><subject>Iris - surgery</subject><subject>Laser Therapy</subject><subject>Medical sciences</subject><subject>Pigment Epithelium of Eye - pathology</subject><subject>Pigment Epithelium of Eye - surgery</subject><subject>Surgery (general aspects). Transplantations, organ and tissue grafts. 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| ispartof | American journal of ophthalmology, 1991-05, Vol.111 (5), p.589-594 |
| issn | 0002-9394 1879-1891 |
| language | eng |
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| source | MEDLINE; Elsevier ScienceDirect Journals Complete |
| subjects | Biological and medical sciences Humans Iris - pathology Iris - surgery Laser Therapy Medical sciences Pigment Epithelium of Eye - pathology Pigment Epithelium of Eye - surgery Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases Surgery of the eye and orbit |
| title | In Vitro Videographic Comparison of Argon and Nd:YAG Laser Iridotomy |
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