Force rfql'irf.ments and patifrn of rupture in siml'i.xtfd ophthalmic trauma

John G. Ladas, Geva Mannor

Research output: Contribution to journalArticlepeer-review


Purpose. Hie objective of this study was to determine the force required to rupture the globe when a stress is applied in various vectors and to examine the regions of the eye m which the rupture occurred Methods. Cadaver eyes obtained from the Northern Virginia Eye Bank were thawed to room temperature in 0 9% NS A force was applied either in an posterior-anterior direction with axis from optic nerve through the cornea or in the coronal plane wiih the axis through the equator. The force necessary to tupture the globe was then determined using a CTM Test stand and Accul-orce 111 Digital Force Gauge (Willrich Precision Instruments) The eyes were also examined for the location and size of the rupture Results The force necessary to rupture the globe was significantly greater when the force was applied in a posterior-anterior vector {20.0± 2.8 Ib.) when compared to the force required when it was applied across the equator ( 13 5±1 4 Ib , P- 0 0) In addition, the specific region of the globe that ruptured was located along the equator in 70 % of those eyes studied Conclusions. These results demonstrate that the force required to rupture a globe is less when the force is applied at the equator compared to the optic ner\e In addition, this study supports the notion that the weakest region of the globe is the equatorial region near the insertion of the extraocular muscles and thus is the most likelv to rupture with a compressive force regardless of ihe vecioi in which the force is applied.

Original languageEnglish (US)
Pages (from-to)S121
JournalInvestigative Ophthalmology and Visual Science
Issue number4
StatePublished - Dec 1 1997
Externally publishedYes

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience


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