And he actually is vision impaired, so he can't see by himself.
他实际上有视力障碍，自己看不见东西。
Vision impaired
原声例句
TED演讲（视频版）双语精选
VOA Daily Standard 2019年1月合集
Jeffrey Fenton from eSight says his electronic glasses can open up a whole new world for the vision impaired.
来自eSight的杰弗里·芬顿表示，他研制的电子眼镜为视力受损的人打开了新世界的大门。
冬奥会特辑
Athletes are divided into three categories, depending on their functional ability: sitting, standing and vision impaired.
根据运动员的功能能力，运动员分为三类：坐姿、站立和视力障碍。
英语百科
Visual impairment
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Visual impairment, also known as vision impairment or vision loss, is a decreased ability to see to a degree that causes problems not fixable by usual means, such as glasses. Some also include those who have a decreased ability to see because they do not have access to glasses or contact lenses. Visual impairment is often defined as a best corrected visual acuity of worse than either 20/40 or 20/60. The term blindness is used for complete or nearly complete vision loss. Visual impairment may cause people difficulties with normal daily activities such as driving, reading, socializing, and walking.
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