Ptosis Sensitivity Threshold for the Lay Observer.

Abstract:

PURPOSE:This study aims to understand the degree to which ptosis is recognizable to a layperson. METHODS:Fifteen color drawings of a gender-neutral human face were created. Six faces exhibited right-sided ptosis (decreased margin reflex distance 1 and lengthened tarsal platform show) of 0.5 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, and 3 mm, respectively. Six more faces exhibited left-sided ptosis of the same amounts. The 12 ptotic faces and 3 symmetrical faces were randomly placed on three 11-inch by 14-inch sheets of paper with 5 faces on each page. Lay observers were provided 6 seconds per face to indicate whether it appeared to be asymmetrical. Statistical tests examined the observers' ability to detect asymmetry better than chance. Sex differences in correctly recognizing asymmetry in ptosis at each 0.5 mm increment were analyzed. RESULTS:One hundred thirty-one lay observers were enrolled in the study. Fifty-seven were women and 74 were men. Lay people were able to correctly recognize ptosis better than chance when the asymmetry was 1.5 mm or greater. Moreover, females were more accurate in recognizing ptosis at 1.5 mm, 2.0 mm, and 2.5 mm of asymmetry. CONCLUSIONS:Lay observers tend to recognize between 1.0 mm and 1.5 mm of ptosis on one side as being abnormal. This may have implications in the selection of candidates for ptosis surgery and the analysis of subsequent surgical outcomes.

journal_name

Ann Plast Surg

authors

Gordon MJ,Christenbury JG,Bokman CL,Rootman DB,Goldberg RA

doi

10.1097/SAP.0000000000001524

subject

Has Abstract

pub_date

2018-09-01 00:00:00

pages

364-366

issue

3

eissn

0148-7043

issn

1536-3708

journal_volume

81

pub_type

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