Scleral indentation height after laser scleral buckling

Se Woong Kang, Jean Marie Parel, Fabrice Manns, Jaeheung Lee, William E. Smiddy

Research output: Contribution to journalConference articlepeer-review

Abstract

Laser scleral buckling (LSB) and scleral buckling are methods of inducing scleral indentation, a necessary objective in standard retinal reattachment surgery. The purpose of this study was to compare the height of scleral indentation produced by both modalities. Twenty (4 columns, 5 rows) overlapping spots of pulsed Holmium:YAG or Thulium:YAG laser were applied at the equatorial sclera in 20 human cadaver eyes (LSB group). The diameter of each laser spot was set to 2.5mm using a custom-made laser probe. Total energy of Holmium:YAG and Thulium:YAG applied to each laser spot were 1285mJ and 815mJ, respectively. Scleral shrinkage and change in scleral thickness were measured. A radially oriented 5mm silicone band was placed at the equator in 10 human cadaver eyes (explant group). The intraocular pressure (IOP) was adjusted to 4mmHg preoperatively, and to 16mmHg postoperatively in all eyes and monitored during the procedure. Scleral indentation height, assessed in frozen sections made along the eyeball equator, produced by Holmium:YAG (1.07mm) and Thulium:YAG (1.30mm) was less than that of explant group (3.12mm)(p<0.05). Each application of a laser spot elevated the IOP by 4.9mmHg and the IOP decreased into a quarter of its elevation after 3.64 seconds. LSB with Thulium:YAG laser is potentially useful in retinal detachments when combined with vitrectomy for creating a shallow and broad buckling effect (i. e. in proliferative vitreoretinopathy cases).

Original languageEnglish (US)
Pages (from-to)136-141
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3246
DOIs
StatePublished - Dec 1 1998
EventProceedings of Ophthalmic Technologies VIII - San Jose, CA, United States
Duration: Jan 24 1998Jan 25 1998

Keywords

  • Fiber optics
  • Holmium YAG
  • Indentation height
  • IOP
  • Laser scleral buckling
  • Retinal detachment
  • Thulium YAG

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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