散光的出现带来了较多的不便，也会给患者眼部的健康带来严重的伤害，大家应当多认识一些关于散光的知识，要将诱发散光出现的因素重视起来，方便各位患者朋友进行散光的应对，来了解一下诱发散光出现的病因有哪些呢。
\n散光的病因：
\n散光是指平行光线经过眼球屈光系统折射后，并不聚为单一点，而是散开的许多光像，所以叫做散光。因为眼球不够圆的缘故。其原因包括了网膜、水晶体、角膜等密度不均或表面凹凸不平所致。因此绝大数人的眼球都不可能完全没有散光，通常只是程度较轻的差别罢了。据研究，散光常因不良的用眼姿势而加重。例如躺着趴着看书，甚至斜眼或眯眼看东西，都会造成眼皮不当的压迫眼球，而影响其正常的发育，所以戒绝坏习惯才是防止散光、杜绝近视的做法。而这些习惯也常是近视的原因，因此有些人以为近视会造成散光，其实两者没有关系的。规则散光多数是由于角膜先天性异态变化所致，还可能存在晶状体散光。
\n不规则散光主要由于角膜屈光面凹凸不平所致，如角膜溃疡、疤痕、圆锥角膜、翼状胬肉等。进入眼球的平行光线各经线焦点不在一个截面上则称为散光。引起散光的原因很多，比较常见的有：曲率性散光，为角膜弯曲度发生异常变化引起。如屈光力最大的子午线与屈光力最小的子午线互相垂直，则引起规则散光，多为先天性，而且散光度数较大。如为角膜表面不规则变形、弯曲不平，在视网膜上无法形成焦点，则称为不规则散光，如角膜外伤性瘢痕、圆锥角膜、角膜变性等。
\n偏心性散光，以前多见于晶体移位，如先天性偏斜、晶体半脱位等;近年来，由于屈光性角膜手术的增多，临床也可见因prk、lasik手术光斑偏离光学中心引起的散光。屈光率性散光，为晶状体各部的屈光指数发生变化所致。散光度数一般比较小，如老年性白内障，晶状体皮质发生水隙、羽毛状混浊，造成晶状体的屈光指数改变，都可形成散光。
\n认识了上面的知识之后，大家了解到了散光的诱发因素有哪些了，散光十分可怕，会困扰到很多的患者朋友，而且对于患者眼睛的健康带来相当严重的伤害，各位朋友必须要清楚的认识散光的知识，而且应当清楚的认识此病的发病因素。
\n","barId":"1773","topicTypeId":"1","topicThemeId":"1028","readLevel":0,"files":"","clickNoLikeCount":0,"clickLikeCount":0,"clickCount":1025,"score":0,"partCount":0,"replayCount":0,"publishStatus":1,"publishTime":1486625600183,"isCream":0,"canReply":0,"shareUrl":null,"foodCouponVal":1,"emailNotice":0,"permission":0,"zlyShare":0,"status":0,"sort":0,"highlight":0,"highlightEffectTime":0,"digest":0,"digestEffectTime":0,"top":0,"topEffectTime":0,"closed":0,"stamp":0,"icon":0,"bgcolor":null,"fontcolor":null,"favtimes":0,"isAdopt":0,"adoptId":null,"sortDate":1486625600182,"metaSearch":null,"rn":0,"barTitle":null,"checkcode":null,"forumUser":{"id":"623d560be20c11e6a61c00163e04584d","isDel":0,"createAt":1485245349701,"createBy":null,"createName":null,"updateAt":0,"updateBy":null,"updateName":null,"username":"期缘","password":"yiren2921","level":0,"nickName":"qiyuan99","realName":null,"signName":"早日相逢","head":"/zly-web/resources/images/qq/4.png","phone":null,"mobile":null,"wechat":null,"qq":null,"email":"jzh@zhao01.com","address":null,"identityType":1,"userType":2,"isPhoneBind":0,"status":0,"accountSource":0,"isStrangerMsg":0,"departmentId":null,"departmentName":null,"sex":2,"provinceId":"110000","cityId":"","userLevel":0,"modifyNameCount":1},"lyTopicReply":null,"createAtStr":null,"lyBar":null,"lyTopic":null},{"id":"4641","isDel":0,"createAt":1486625574208,"createBy":"623d560be20c11e6a61c00163e04584d","createName":"期缘","updateAt":0,"updateBy":null,"updateName":null,"userId":"623d560be20c11e6a61c00163e04584d","title":"散光具体的危害是什么","content":"
散光是眼科当中最常见的一种疾病，此病的产生大多与眼睛过度疲劳而有很大的关系，患者在患病的初期会感觉重影、视力模糊等症状，如不进行积极的治疗会给患者的眼部带来很大的危害，使其严重影响着患儿的正常视力。那么，具体对于散光疾病会带来哪些危害呢？
\n散光形成原因为角膜弧度不正。多是先天形成，但个别眼皮长霰粒肿长期压迫眼球也会出现散光。
\n1、引起头痛、眼酸等现象：高度散光不予以矫正较容易引起头痛、眼酸等现象，同时也容易引起歪头等不良姿势；所以，散光程度严重者一定要予以矫正。
\n2、视觉疲劳：散光眼由于各经线上的屈光力不同，对平行光线折射无法形成焦点而是两条焦线，所以大脑容易产生对像的选择读解。原因是散光眼容易产生对近视网膜的焦线的方向的景物；另外，散光眼为了相对看清景物要尽可能的使用调节去缩小弥散圈的大小以提高像的质量；高度散光如果矫正不当或不戴镜容易引起头痛、视疲劳等症状，因而散光眼很容易产生视疲劳。
\n3、无论视远物、视近物，均感模糊不清：散光眼较重者无论视远物、视近物，均感模糊不清，患者常有把眼睑半闭眯成缝隙的习惯，企图以此使物体看得较清晰。
\n4、视力减退：散光眼远离视网膜的焦线方向的视标颜色变淡，边缘发虚不清，不容易辨认，视力下降，重者产生复视。除生理性散光外，各种散光都容易引起视力下降。
\n5、压迫眼球：散光一般都用普通眼镜或隐形眼镜来矫正。一般是先天形成的，但也有后天的个别原因，最简单的例子就是；外伤和眼皮长霰粒肿没有及时治疗，会长期压迫眼球而造成散光。在个别情况下散光也会合并假性近视，这时就该去掉假性近视部份，而散光再给予配镜矫正。
\n6、弱视：这种病症多见于高度散光，特别是远视散光，因其看远看近都不清楚，视觉得不到锻炼，易于发生弱视，继之又有发生斜视的倾向。
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散光是指平行进入眼内的光线，各子午线方向的主焦点不能汇聚成一点，而是形成一条线，使外界的物体不能在视网膜上形成一个清晰的图像。也就是通常大家说的眼睛不聚光。
\n诊断散光时容易误诊
\n由于散光的临床表现无特异性，易与多种疾病混淆，导致误诊甚至误治，所以临床上需与下列疾病鉴别：近视，远视，青光眼；副鼻窦炎；血管神经性头痛等引起头痛的神经科疾病。
\n散光的两个主要症状是视力降低和视疲劳。近视散光也不例外。在散光的度数不高时，如果工作不需要精确的视力，常无任何症状，而当患者在做近距离细工作时，眼睛易感疲劳，还会有暂时性视力模糊。
\n另外一种情况见于老年性白内障的初期，由于晶状体皮质发生水隙、羽毛状混浊，造成晶状体的屈光能力发生不一致性改变，这是造成中老年人散光的主要因素。散光的主要表现是视物模糊及视疲劳，可合并有近视或远视，甚至伴有弱视、斜视。
\n散光检查可选择圆柱镜法
\n圆柱镜法，现已普遍应用。其优点是低度及高度散光均可应用此法测定，有事半功倍的效果，尤其对于主觉插片时难以确定圆柱镜轴向者（例如小儿等），必须应用此法才能准确地决定圆柱镜的轴位。
\n在用球面镜检影时，发现有散光，则加用圆柱镜（符号与球面镜相同者用得较多），其轴位视眼底反光决定。如180°子午线反光运动矫正不足，则轴在90°；若眼底反光的边缘变直（或呈带状），其光带若呈水平向，则圆柱镜的轴放在180°；光带呈垂直向时，则将圆柱镜的轴放在90°。轴位一经决定，改换圆柱镜时均以此轴为准，故必须将轴位默记。
\n加圆柱镜后继续检影，观察与圆柱镜轴向成垂直方向的子午线的眼底反光（如轴位为90°，则观察180°子午线方向的反光运动），直至这一方向运动的反光达反转点。对于成人，检影时主要测定圆柱镜度数，并了解轴的大概方位（垂直、水平、稍向某方偏斜），使复验时胸有成竹，并不一定需要十分精确地确定轴位。至于正确的轴位在试镜片时可以很容易地确定。
\n散光还可以如何诊断结果更清晰：
\n1、一般托比卡胺滴眼液散瞳验光检查，少数青少年高度散光者，可以用1%阿托品滴眼液或眼膏散瞳，检查中以查出各种散光性质；
\n2、视力检查：通过远视力和近视力检查，可以发现散光。散光较重的患者，远视力和近视力都不好。
\n3、散光表检查：散光表上有很多放射状条纹，检查时如果被检查者感到某一条子午线的条纹不清楚，说明有散光。
\n4、检查屈光度：通过验光即可诊断散光眼。这是最常用的诊断散光眼的方法。
\n散光检查容易误诊呦。
\n0
\n","barId":"1773","topicTypeId":"1","topicThemeId":"1028","readLevel":0,"files":"","clickNoLikeCount":0,"clickLikeCount":0,"clickCount":839,"score":0,"partCount":0,"replayCount":0,"publishStatus":1,"publishTime":1486625546432,"isCream":0,"canReply":0,"shareUrl":null,"foodCouponVal":1,"emailNotice":0,"permission":0,"zlyShare":0,"status":0,"sort":0,"highlight":0,"highlightEffectTime":0,"digest":0,"digestEffectTime":0,"top":0,"topEffectTime":0,"closed":0,"stamp":0,"icon":0,"bgcolor":null,"fontcolor":null,"favtimes":0,"isAdopt":0,"adoptId":null,"sortDate":1486625546431,"metaSearch":null,"rn":0,"barTitle":null,"checkcode":null,"forumUser":{"id":"623d560be20c11e6a61c00163e04584d","isDel":0,"createAt":1485245349701,"createBy":null,"createName":null,"updateAt":0,"updateBy":null,"updateName":null,"username":"期缘","password":"yiren2921","level":0,"nickName":"qiyuan99","realName":null,"signName":"早日相逢","head":"/zly-web/resources/images/qq/4.png","phone":null,"mobile":null,"wechat":null,"qq":null,"email":"jzh@zhao01.com","address":null,"identityType":1,"userType":2,"isPhoneBind":0,"status":0,"accountSource":0,"isStrangerMsg":0,"departmentId":null,"departmentName":null,"sex":2,"provinceId":"110000","cityId":"","userLevel":0,"modifyNameCount":1},"lyTopicReply":null,"createAtStr":null,"lyBar":null,"lyTopic":null},{"id":"4183","isDel":0,"createAt":1486625522623,"createBy":"623d560be20c11e6a61c00163e04584d","createName":"期缘","updateAt":0,"updateBy":null,"updateName":null,"userId":"623d560be20c11e6a61c00163e04584d","title":"眼睛为什么会出现散光呢你知道吗","content":"
现在我们长时间的使眼睛处于疲劳状态是非常正常的，当时我们可能觉察不到什么不适，但是长久以往很有可能会给我们带来散光的危害的，眼科疾病分类较多，对于一些常见的眼科疾病，比如近视眼之类的，我们已经不再陌生了，但多数近视眼患者可能同时患有散光，这一点，也许就没有多少人知道了吧。眼睛为什么会散光呢?下面就为大家做下介绍，希望能接触大家心中的疑惑。
\n散光是平行光经椭圆形的屈光面成象后，在视网膜不能形成清晰影象，有近视散光，远视散光，近视远视散光同时存在。散光可以用带柱镜的眼镜矫正，也可以用隐形眼镜矫正，硬性隐形眼镜矫正散光很好。通俗地讲，光线进入眼内经过折射才能在眼底视网膜上清晰成像。光线折射要均匀，即每支光线折射的力量要相等。如果折射力量不相等，有大有小，使光线不能聚合到一点，而是分散于多点，或两线、两片，不可能在视网膜上清晰成像。这种情况称为散光。
\n眼睛散光的原因1、曲率性散光：为角膜弯曲度发生异常变化引起。如屈光力最大的子午线与屈光力最小的子午线互相垂直，则引起规则散光，多为先天性，而且散光度数较大。如为角膜表面不规则变形、弯曲不平，在视网膜上无法形成焦点，则称为不规则散光，如角膜外伤性瘢痕、圆锥角膜、角膜变性等。
\n眼睛散光的原因2、偏心性散光：以前多见于晶体移位，如先天性偏斜、晶体半脱位等;近年来，由于屈光性角膜手术的增多，临床也可见因PRK、LASIK手术光斑偏离光学中心引起的散光。
\n眼睛散光的原因3、屈光率性散光：为晶状体各部的屈光指数发生变化所致。散光度数一般比较小，如老年性白内障，晶状体皮质发生水隙、羽毛状混浊，造成晶状体的屈光指数改变，都可形成散光。
\n为了我们的眼睛健康，为了我们能够看清这个世界上的一切美好事物，我们还是应该要好好的照顾自己的眼睛，通过上诉介绍，相信大家已经明白了眼睛散光的原因。同时，在这里提醒广大近视眼患者们，在检查眼睛近视程度的同时，不妨多关心一下，看看自己是否同时还有眼睛散光的症状。
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散光对大家来说并不陌生，尤其是对于一些近视的患者，近视的患者一般都会伴有散光的情况，散光一般是由于眼睛疲劳过度而引起的，孩子出现散光的概率是非常高的， 家长朋友们一定要重视这一问题，及时的帮助孩子进行的预防，下面我们看看散光的危害有哪些。
\n1、引起头痛、眼酸等现象：高度散光不予以矫正较容易引起头痛、眼酸等现象，同时也容易引起歪头等不良姿势;所以，散光程度严重者一定要予以矫正。
\n2、视觉疲劳：散光眼由于各经线上的屈光力不同，对平行光线折射无法形成焦点而是两条焦线，所以大脑容易产生对像的选择读解。原因是散光眼容易产生对近视网膜的焦线的方向的景物;另外，散光眼为了相对看清景物要尽可能的使用调节去缩小弥散圈的大小以提高像的质量;高度散光如果矫正不当或不戴镜容易引起头痛、视疲劳等症状，因而散光眼很容易产生视疲劳。
\n3、无论视远物、视近物，均感模糊不清：散光眼较重者无论视远物、视近物，均感模糊不清，患者常有把眼睑半闭眯成缝隙的习惯，企图以此使物体看得较清晰。
\n4、视力减退：散光眼远离视网膜的焦线方向的视标颜色变淡，边缘发虚不清，不容易辨认，视力下降，重者产生复视。除生理性散光外，各种散光都容易引起视力下降。
\n5、压迫眼球：散光一般都用普通眼镜或隐形眼镜来矫正。一般是先天形成的，但也有后天的个别原因，最简单的例子就是;外伤和眼皮长霰粒肿没有及时治疗，会长期压迫眼球而造成散光。在个别情况下散光也会合并假性近视，这时就该去掉假性近视部份，而散光再给予配镜矫正。
\n6、弱视：这种病症多见于高度散光，特别是远视散光，因其看远看近都不清楚，视觉得不到锻炼，易于发生弱视，继之又有发生斜视的倾向。
\n温馨提示，散光疾病出现的时候，经常会让患者伴有眼部疲劳，并且引起头痛的感觉，另外，视力也逐渐的在减退，同时对于眼球有一种压迫感，因此大家了解了这些情况以后，一定要在生活中对散光，做到及时的预防，避免影响健康。
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