Results The optometer has the merits of simple manipulation, exact result, small cubage, AC/DC power supply and so on.Besides, it prevents the testee from remembering eye-chart.

• 结果：其具有操作简单、结果准确、体积小、便于携带、使用方便、交直流两用等优点，防止了人为因素造成的测试结果不准和被测者记忆视力表的现象。