何谓视力?检测视力有何意义?

作者: rantiku 人气: - 评论: 0
问题 何谓视力?检测视力有何意义?
选项
答案
解析 视力又称为视敏度,是指眼分辨一定距离物体微细结构的最大能力,即能分辨距离最小的两点的能力。近视、远视、散光等屈光不正均可导致视力下降,因此视力测定是检测视觉功能的一个重要指标。

猜你喜欢

发表评论
更多 网友评论0 条评论)
暂无评论
错误啦!

错误信息

  • 消息: [程序异常] : MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
  • 文件: /twcms/kongphp/cache/cache_redis.class.php
  • 位置: 第 85 行
    <?php echo 'KongPHP, Road to Jane.'; ?>