ISO 9241-391:2016提供了在电子显示屏上查看图像时减少光敏性癫痫发作（PSS）的要求和建议。 ISO 9241本部分中的要求和建议适用于图像内容。通过图像内容，可以参考与显示图像的设备或环境无关的图像。 ISO 9241本部分中的要求和建议是为了保护观看人群中的易受伤害个体，这些个体具有光敏性，因此容易因闪光灯和规则图案（包括某些重复图像）引发癫痫发作。 注1:ITU考虑与广播有关的图像安全问题。其中一些在ITU-R BT.1702中进行了描述。[2] 注2:ISO/IEC 40500:2012，W3C网络内容可访问性指南（WCAG）2.0中有一些关于网络内容可访问性的相关建议。 注3:光敏性癫痫和光敏性癫痫，即以反复发作为特征的慢性病是医学疾病。光敏性的临床方面见附录C。视觉诱发癫痫相当于PSS。

ISO 9241-391:2016 provides requirements and recommendations for reducing photosensitive seizures (PSS), while viewing images on electronic displays. The requirements and recommendations in this part of ISO 9241 are designed to be applied to image contents. By image contents, reference is made to the images independent of the device or environment in which they are displayed. The requirements and recommendations in this part of ISO 9241 are for the protection of the vulnerable individuals in the viewing population who are photosensitive and who are therefore liable to seizures triggered by flashing lights and regular patterns, including certain repetitive images. NOTE 1 ITU considers the image safety issues in relation to broadcasting. Some of these are described in ITU-R BT.1702.[2] NOTE 2 There are some related recommendations in ISO/IEC 40500:2012, W3C Web Content Accessibility Guidelines (WCAG) 2.0, for web contents accessibility. NOTE 3 Photosensitive seizures and photosensitive epilepsy, that is, chronic conditions characterized by those repeated seizures are medical conditions. Clinical aspects of photosensitivity appear in Annex C. Visually induced seizures are equivalent to PSS.