红眼效果因闪灯光线与被摄人物的眼球成直线产生眼球内的微血管反射出来使影像形成红色幢孔的情况
The red-eye effect occurs when the flash light is in a straight line with the subject's eyeball, causing the microvessels within the eyeball to reflect, resulting in a red aperture in the image
以上为机器翻译结果，长、整句建议使用 人工翻译 。