Wǒ / kàn / hēi / bǎn / shí / yǒu / chóng / yǐng / kě / néng / xū / yào / jiǎn / chá / shì / lì我看黑板时有重影,可能需要检查视力。I see double images when looking at the blackboard, so I may need an eye exam.