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Related Experiment Videos

When is enophthalmos "significant"?

Lily Koo1, Mark P Hatton, Peter A D Rubin

  • 1Ophthalmic Plastics, Orbital, and Aesthetic Surgery, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts 02114, USA.

Ophthalmic Plastic and Reconstructive Surgery
|July 21, 2006
PubMed
Summary
This summary is machine-generated.

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Enophthalmos less than 3 mm is often imperceptible. Measurements of 5 mm or more of enophthalmos are consistently noticeable, guiding surgical management decisions.

Area of Science:

  • Ophthalmology
  • Plastic Surgery

Background:

  • Enophthalmos, the posterior displacement of the eyeball, can affect appearance and requires accurate measurement for treatment.
  • Determining the visual threshold for detecting enophthalmos is crucial for surgical planning.

Purpose of the Study:

  • To ascertain the minimum measurable enophthalmos (in millimeters) detectable by observers.
  • To establish a quantifiable basis for surgical intervention in enophthalmos cases.

Main Methods:

  • A study group of 12 patients with 1-8 mm enophthalmos and a control group of 12 normal subjects were selected from a database.
  • Photographs were reviewed by observers who classified appearances as normal or abnormal.

Main Results:

  • No statistical difference in perceived normality was found between control subjects and those with 1-2 mm enophthalmos.

Related Experiment Videos

  • Only 28% of observers perceived 3-4 mm enophthalmos as abnormal (P < 0.001).
  • 97% of observers identified 5-8 mm enophthalmos as abnormal (P < 0.001).

    • Conclusions:

    • Enophthalmos of 2 mm or less is visually indistinguishable from a normal appearance.
    • Enophthalmos becomes consistently detectable at measurements between 3 mm and 4 mm.
    • Significant enophthalmos (≥5 mm) is readily identified as abnormal, informing surgical decisions.