Retroflexion palpebral , conjunctiva of visible affected part shows gules , amaranth or gray .
翻转眼睑,可见患处结膜呈红色、紫红色或灰色。
The results indicate that there were significant differences in mandarin retroflexion among different groups categorized by sex , fathers ' ethnic groups , mothers ' educational levels , and in english retroflex sounds according to different residency areas .