Optical coherence tomography of Descemet membrane separation by the big bubble technique

Igor Kaiserman, Irit Bahar, David S. Rootman

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


PURPOSE: To image Descemet membrane separation by the big bubble technique in human corneas by using anterior segment optical coherence tomography (OCT). METHODS: Five human corneoscleral rims were placed on an artificial anterior chamber and partially trephinated. A 23-gauge needle was inserted into the stroma under slit-lamp control and air was injected. The procedure was continuously imaged by anterior segment OCT. RESULTS: In all corneoscleral rims, a big bubble was created. The spread of air seemed to follow the interlamellar spaces without crossing lamellae. It involved mainly the inner layers of the stroma while sparing the outer 212 ± 41 μm of the cornea (range, 168-271 μm). Intrastromal pressure build-up forced air above the Descemet membrane, creating tiny air bubbles of ∼355 ± 111 μm (range, 210-560 μm). When the pressure inside those bubbles reached a certain level, the bubbles spontaneously coalesced to form a big bubble. CONCLUSIONS: OCT is useful in imaging intracorneal air spread. The main obstacle to creating a big bubble is the impermeability to air of the imperforated posterior stromal lamellae.

Original languageEnglish
Pages (from-to)1115-1117
Number of pages3
Issue number9
StatePublished - 1 Oct 2007
Externally publishedYes


  • Deep anterior lamellar keratoplasty
  • Optical coherence tomography

ASJC Scopus subject areas

  • Ophthalmology


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