Health encyclopaedia - Alphabetical Topic List健康百科全书-按字母顺序排列的主题清单

| A | | 1 | | B | | b | | C | | 人才招聘 | | D | | | | E | | 电子 | | F | | f | | G | | | | H | | h | | I | | | | J | | j | | K | | k | | L | | | | M | | |
| N | | n | | O | | o | | P | | p | | Q | |常见问题 | | R | | 研究 | | S | | | | T | | | | U | | u | | V | | v | | W | | 瓦特 | | X | | x | | Y | | y |

Causes of Long-sightedness原因长期近视

Long-sightedness can occasionally run in families, and it is therefore important that children under three are formally tested for the condition if there is a family history.长期近视可以偶尔运行在家庭,因此,这是重要的是, 3岁以下儿童在正式测试的条件,如果是有家族病史。 Other than genetic factors, there are rarely definite causes for long-sightedness.以外的其他遗传因素,很少有一定的原因,长期的近视。 Rarely, hypermetropia may be caused by conditions that indent and shorten the eyeball, such as orbital tumours behind the eye.很少,远视的原因可能是条件,缩进,并缩短眼球,如眼眶肿瘤背后的眼睛。