Netra is an inexpensive and easy-to-attach add-on for self-testing eyesight quickly, easily, and accurately with a mobile phone. Credit: Andy Ryan, MIT Media lab.
Netra是一种便宜并易于安装的附件，通过和移动电话结合，可以快速便捷又不失精准的进行视力自我检查。
One of his group's first experiments is the prototype of Netra, a system that can identify problems with a person's eyesight using only a smartphone, software, and inexpensive optical add-ons.
研究小组最初的实验之一是Netra原型机，这是一种只需一部智能手机、相关软件和便宜的光学套件就可以鉴定视力问题的系统。
One of his group's first experiments is the prototype of Netra, a system that can identify problems with a person's eyesight using only a smartphone, software, and inexpensive optical add-ons.
研究小组最初的实验之一是Netra原型机，这是一种只需一部智能手机、相关软件和便宜的光学套件就可以鉴定视力问题的系统。
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