Farkas L G, Posnick J C, Winemaker M J
Dtsch Z Mund Kiefer Gesichtschir. 1989 Nov-Dec;13(6):429-32.
The relationship of measurements of the intercanthal width (en-en), the biocular width (ex-ex) and both eye fissures (ex-en), constituting the orbital protrusion index ex-ex x 100 (en-en) + (en-ex, r) + (en-ex, l) was used to analyze preoperative morphological developments in the orbits of 23 patients with Treacher Collins syndrome. The index permitted distinction between mildly and severely defective orbits, based on the degree of defective measurements and variations in relative sagittal positions. Optimal index values (mean, 94.0) were seen in 11 subjects with a slightly different sagittal level between the inner and outer commissures of the eye fissures, which created slightly protruding but still normal soft-tissue relief. The eye fissures in seven patients were moderately reduced in length. Orbits with higher indices (mean 98.1) (12 subjects) showed less differences in level between the two commissures of the eye fissures, producing a flattening in the surface relief. Eye fissure length was markedly subnormal in all patients.
通过测量内眦间距（en-en）、双眼间距（ex-ex）以及双眼睑裂（ex-en），构成眼眶突出指数ex-ex×100 /（en-en）+（en-ex，r）+（en-ex，l），用于分析23例特雷彻·柯林斯综合征患者术前眼眶的形态发育情况。该指数可根据测量缺陷程度和相对矢状位的变化，区分轻度和重度眼眶缺陷。11名受试者的眼裂内、外眦矢状位水平略有不同，形成轻度突出但仍正常的软组织轮廓，其眼眶突出指数最佳（平均值为94.0）。7例患者的睑裂长度中度缩短。指数较高（平均值为98.1）的眼眶（12名受试者），其眼裂两端水平差异较小，导致表面轮廓变平。所有患者的睑裂长度均明显低于正常水平。
