When we're engaged in near-focus tasks our eyes are actually working really hard, because the muscles have to accommodate the lens to focus that close.
当我们从事近聚焦任务时，我们的眼睛确实工作得很辛苦，因为肌肉必须适应镜头来聚焦。
2
Objective To investigate the clinical effects of using the chopper designed by us in small-incision hard nucleus cataract nonphacoermul-sification and intraocular lens implantation surgery.
目的探讨自行研制的劈核刀在硬核白内障小切口非超声乳化人工晶状体植入术中的临床应用效果。
3
Objective To investigate the results of phacoemulsification combined with manual nuclear extraction with PMMA intraocular lens implantation operation in hard nuclear cataract.