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前天我们发现孩子在做游戏的时候，老是抓不中眼前的球，而且稍微远一点的东西，他也会看不清楚。我们带他到眼科医院检查，发现患有散光。我想了解一下小孩散光是怎么造成的，才四岁的小孩就患了散光，我觉得有点不可思议。


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11年时左眼散光175，右眼近视200度，配了眼睛，但是戴几个小时眼睛会发酸，所以就很少戴，但是14年去检查左眼散光达到350以上了，加镜片已经没有效果了，请问通过现在的医学手段散光眼能治好吗？


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眼睛是心灵的窗户，一定要保护好视力，防治眼部疾病的发生，首先要从饮食着手，一定要注意营养均衡，才能对视力有所帮助。在日常饮食中，儿童散光吃什么好呢？下面一起了解一下。


\"儿童散光吃什么好

 

(1)患者要多吃富含维生素A的食物，因为维生素A对视力的恢复有很大帮助。如果维生素A不足，就会造成视紫红质的再生慢而且不完全，暗适应时间延长，严重的患者会出现夜盲症。如果饮食当中的维生素A继续缺乏或不足，继而会导致干眼病的出现，慢慢的这个疾病就会转化成角膜软化及角膜溃疡，还可能会造成角膜皱折和毕脱氏斑。所以，要多吃各种动物肝脏、鱼肝油、鱼卵、禽蛋等富含维生素A的食物；还有胡萝卜、菠菜、苋菜、苜蓿、红心甜薯、南瓜、青辣椒等还有丰富维生素A的瓜果蔬菜。

 

(2)患者要多吃柿子椒、西红柿、柠檬、猕猴桃、山楂等富含维生素C的瓜果蔬菜，因为维生素C会减弱光线与氧气对眼睛晶状体的伤害，还可以降低白内障的发生。

 

(3)患者要多吃奶类及其制品、贝壳类(包括虾）、骨粉、豆及豆制品、蛋黄和深绿色蔬菜等含钙较多的食物，因为钙与眼球构成有很大关系，缺钙会影响近视眼。青少年正处在生长高峰期，体内钙的需要量相对增加，如果不能及时补充钙能量，不但会对骨骼发育造成影响，而且降低正在发育的眼球壁——巩膜的弹性，晶状体内压上升，导致眼球的前后径拉长而导致近视。

 

(4)患者应该多吃糙米、麦麸、动物的肝脏、葡萄汁、果仁等含有丰富的铬的食物，因为缺铬就会导致近视的发生。由于铬能激活胰岛素，使胰岛发挥最大生物效应，如人体铬含量不足，就会使胰岛素调节血糖功能发生障碍，血浆渗透压增高，致使眼球晶状体、房水的渗透压增高和屈光度增大，从而诱发近视。

 

（5）患者应该多吃牡蛎、肉类、肝、蛋类、花生、小麦、豆类、杂粮等含锌较多的食物。因为缺乏锌会造成视力障碍，锌在体内主要分布在骨骼和血液中。眼角膜表皮、虹膜、视网膜及晶状体内亦含有锌，锌在眼内参与维生素A的代谓与运输，维持视网膜色素上皮的正常组织状态，维护正常视力功能。

 

找良医网温馨提示：以上就是关于儿童散光吃什么好的介绍，希望能对大家有所帮助，希望各位定期做身体检查，如有身体不适请及时到医院就诊，早日查清病况及早治疗，最后，祝愿大家身体健康！


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随着人们生活水平的逐渐提高，信息化也越来越普及，导致很多人长期使用电子产品，出现了一些眼部问题，比如散光，散光是眼睛的一种屈光不正常状况，与角膜的弧度有关。散光严重影响着患者的日常生活，给日常生活带来很大的不便，散光患者可以通过日常饮食来调节。下面就为大家介绍散光吃什么比较好？


 

\"专家为您介绍散光吃什么比较好\" 

 

屈光不正常是散光的一种表现，与角膜的弧度有关系。有一些人眼睛的角膜在某一角度区域的弧度较弯，在另一些角度区域则较扁平。散光主要症状有看远看近都不清楚，线条清晰度不相同，眯眼、斜颈的习惯，容易产生眼疲劳，暂时性的视力模糊，前额部头痛，光线暗的时候及夜间视力差。

 

散光患者应该如何饮食?

 

1、多吃黄绿色的蔬果，促进皮肤和眼睛的细胞生长的效果，还有一定的抗癌作用以及不错的减肥效果，在抵御疾病方面也颇有效果。除此之外，一旦这两种色素进入体内后，它们在眼睛后部的光敏感组织中积累，这些基因经过过滤蓝光对眼睛起到保护作用。叶黄素和胡萝卜素的另外来源有长叶莴苣、羽衣甘蓝、西兰花、鳄梨、球牙甘蓝、西葫芦、猕猴桃等。

 

2、多吃含维生素C的蔬果，含维生素C的蔬果是抗氧化剂。比如猕猴桃富含维生素C和多种微量元素。只要周围存在大量的抗氧化剂就可以有效地中和所形成的自由基。只需在日常菜单中添加西红柿、辣椒、柑橘类水果、猕猴桃、浆果和花椰菜，就可以加强维生素C的摄入量。

 

3、多吃含维生素A的蔬果，梨、苹果、枇杷、樱桃、香蕉、桂圆、杏子、荔枝、西瓜、甜瓜。除了杏以外，大多数黄色水果一份中维生素A的含量都少于400单位。因为胡萝卜饱含另外一种类胡萝卜素β-胡萝卜素，可以在身体中转变成维生素A，而维生素A对眼睛正常行使功能是非常重要的。可以多吃笋瓜、红薯、甜瓜、杏、桃和番木瓜。

 

通过上述内容介绍，相信大家对得了散光后应该如何饮食调理会有更明白的认识。散光的形成除了先天因素以外，后天因素占据更多，因此除了要佩戴眼镜矫正外，还要注意饮食调理，养成良好的用眼习惯，才能更好防治散光。


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散光是常见的一种眼科疾病，给人日常生活、学习都带来了不便。人们大都知道患近视眼的人大都伴有散光，这是由角膜弧度改变引起的。下面我们就来一起来看看散光眼的危害吧。

 

\"专家为您讲解散光眼的危害有哪些\"

 

一般来说，近视性的散光近视力比远视力好；远视性的散光则远、近视力均不好。调节作用对青少年散光的视力也产生一定影响，尤其是屈光性质有远视成分的散光眼。例如调节作用可使单纯远视散光变为单纯近视散光，混合性散光变为高度近视散光，使视力下降更为明显。

 

散光眼的危害分析：

 

1、散光也称为无焦点的眼，因此视力下降是散光的临床症状之一，只有程度很轻属于生理范围的顺规散光视力可正常。

 

2、长期散光会导致眼睛疲劳，并且眼睛会感觉胀痛、头也会痛、眼睛还会流泪、犯恶心、也伴有呕吐的问题。

 

3、由于散光的视网膜上不能聚为一个焦点，低度散光远、近视力一般正常，但在精细目力工作时易出现眼疲劳；而高度散光者，常出现视物模糊或视物迷眼;

 

4、当眼睛出现散光的情况，会在眼底视盘呈现垂直椭圆形，边缘也会随之模糊，戴眼镜不能很清晰地看清眼底。

 

如果它的弧度不平均，或晶体老化以致改变了光线进入眼内的折射率，也会造成散光。因此经常揉眼睛会提高患散光的风险，尤其是青少年。

 

上述内容是找良医网对于散光眼的危害性有哪些的介绍，在我们的生活中出现散光的时候，一定要及早的去医院治疗哦，因为这种疾病的危害是很多的。


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散光是属于眼科当中一种疾病，预防散光，平时一定要保持一个良好的工作姿势，要保证一个最适当的姿势，这样会使双眼平视或轻度向下注视荧光屏可以使颈部的肌肉轻松，并且会使眼球暴露于空气当中的面积减少到最低。那么，眼睛散光严重会引起的危害是什么?

 

\"专家为您讲解眼睛散光严重会引起什么危害\" 

 

由于散光的视网膜上不能聚为一个焦点，所以不论看远还是看近都是朦胧不清，经常要通过改变调节或将眼睑眯起成裂隙状，其效果是使眼屈光系统的史氏光锥的焦线距离缩短，以接近最小弥散圈，达到视力稍微清晰的目的，但却易造成视疲劳。视疲劳也是散光的临床症状。

 

散光主要症状有看远看近都看不清楚，线条清晰度不一样。眯眼、斜颈的习惯;容易产生眼疲劳，暂时性的视力模糊，前额部头痛;光线暗的时候及夜间视力差。散光可根据屈光情况分成不规则散光和规则散光。不规则散光是指各子午线的弯曲度也是不一样的，用一般柱镜无法矫正；规则散光是指弯曲度的子午线与弯曲度最小的子午线正好垂直，用柱镜矫正能获得很好的视力，也可以选择手术矫正。

 

根据研究发现，散光常因不良的用眼姿势而加重。比如躺着趴着看书，特别是斜眼或眯眼看东西，都会导致眼皮不当的压制眼球，而导致其正常的发育，所以戒绝坏习惯才是防止散光、杜绝近视的做法。而这些习惯性动作也常是近视的原因，所以有些人以为近视会引起散光，其实两者没有关系的。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。


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散光是一种十分常见眼部疾病，它的病发率很高，跟近视一样，在散光的患者中，青少年的人数就占了很大部分。但是许多人都觉得散光不是什么大事，带眼镜就可以了，其实散光也会对眼部产生影响，严重时危害也是很大的。那么，说说散光严重引起哪些并发症?

 

 \"专家告诉你散光严重会引起哪些并发症\"

 

1、严重时会引起头痛、眼酸等特征：高度散光不予以矫正较轻易导致头痛、眼酸等现象，同时也容易引起歪头等不良姿势；所以，散光程度严重者要及时矫正。

 

2、视觉疲劳就是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，但是大脑容易产生对像的选择读解。因为是散光眼容易产生对近视网膜的焦线的方向的景物；还有，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发头痛、视疲劳等现象，因而散光眼很容易产生视疲劳。

 

3、无论看远物、视近物，都会感觉模糊不清：散光眼较重者无论视远物、视近物，均感模糊不清，病患常常把眼睑半闭眯成缝隙的习惯，想以此使物体看得较清晰。

 

4、视力慢慢减退，散光眼远离视网膜的焦线方向的视标颜色逐渐变淡，边缘发虚不清，辨识度不高，视力降低，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。

 

5、会导致压迫眼球，散光平常都用普通眼镜或隐形眼镜来矫正。一般是先天就形成，但也有后天别的原因，最简单的例子就是外伤和眼皮长霰粒肿没有及时治疗，会长期压迫眼球而导致散光。在不同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，散光时再给予配镜矫正。

 

6、弱视这种病症常见于高度散光，主要是远视散光，因为看远看近都不清楚，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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眼睛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，所以戒绝坏习惯才防止散光、杜绝近视的做法。而这些习惯也常近视的原因，因此有些人以为近视会造成散光，其实两者没有关系的。那么，什么是散光眼？引起散光眼的主要原因有什么。

 

\"专家为你讲解什么是散光眼\"

 

先天因素导致，有些人眼睛的角膜在某一个角度区域的弧度是呈弯的，而另一角度区域则是扁平的，因为角膜上的这些厚薄不匀或角膜的弯曲度不匀，就会引起角膜各子午线的屈折率不一样，当光线在经过这些子午线的时候没办法聚集于同一焦点，这样就会引起散光眼。

 

也有后天因素，虽然患者先天性的角膜弧度是较好的，但如果在这个时候眼睑长出了针眼或粟粒肿，也有可能是长期用眼的姿势不良等都是会造成角膜弧度发生改变的，而对于已经患上散光的患者，在这些病因发生之后还会引起其散光的度数越发的严重，另外还有一些眼科手术也是可以改变散光度数和轴度的。

 

如果眼睛的角膜弯曲度发生变化，这也是导致散光发生最为主要的因素。因为正常的眼球前面就像是一个窗户，不仅光滑透明，而且还是呈完整的半球形，可以把光线集中起来使它大达到眼底的视网膜，之后可以清楚的看到外界的景象。但如果半球形的角膜曲度发生了变化，外来的光线就不能在视网膜上结成焦点，从而也就会引起散光的症状出现了。

 

还有角膜的屈光能力不一样，由于这种原因引起的散光称之为有规则的散光，主要就是因为角膜弯曲度在某一个方向跟其他的方向垂直不一致的时候所引起的，其类型比较多，如单纯远视散光、单纯近视散光、复性远视散光以及复性近视散光等都是比较常见的，以至于还有一些患者在远视和近视同时存在的，这种现象的散光大多通过眼镜就可治疗。

 

其他疾病导致的，主要指的就是由于其他疾病引起的角膜屈光面凹凸不平，这也就会导致散光发生了，而在临床上可以引起散光的常见因素主要有角膜溃疡、疤痕、圆锥角膜以及翼状胬肉等疾病。


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散光，其形成原因为角膜弧度不正所致。正常的角膜表面应像个篮球是圆形的，其水平、垂直或斜向的屈率半径均相同，光线通过时才会聚焦在同一点上。有些人以为近视会造成散光，其实两者没有关系的，那么散光是怎么形成的，下面就来一起看一下吧。

 

 \"散光是怎么形成的

 

散光形成最常见原因：

 

1、视力受到疲劳，一般和年龄及工作性质相关，年龄越大并且坐在桌子前的人容易造成轻中度的散光，如低于正常值，则需要配镜矫正。

 

2、近看时散光的改变，双眼向内往下看，并且眼球也产生旋转作用，使眼的散光轴发生变动，故配镜时可根据病患不同的年级，焦点深度和相对调节力来选用合适的远、近的镜片。

 

3、眼镜片导致的影响，有影像大小不均匀效果、轴位的变动、镜片表面不平等因素，有的镜框大小不一，也可能影响到外围光学的问题而造成散光。散光的原因：

 

偏心性散光：前期多见于晶体移位，比如先天性偏斜、晶体半脱位等;近些年，因为屈光性角膜手术的增加，临床也可见因PRK、LASIK手术光斑偏离光学中心导致的散光。

 

曲率性散光：为角膜弯曲度导致异常变化。如屈光力大的子午线与屈光力小的子午线互相垂直，是会引起规则散光，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，在视网膜上无法转换为焦点，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。

 

屈光率性散光：多为晶状体各部的屈光指数发生变化导致。散光度数一般不打，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。


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散光是每个近视眼几乎都会出现的，不光是大人会散光，小孩子也是会出现散光的。下面就跟大家介绍一下引起儿童散光的原因有哪些？希望各位家长要引起重视。


\"引起儿童散光的原因


一、视力减退

散光眼患者由于远离视网膜焦线方向的视标颜色变淡，边缘会发虚不清，出现视力下降，严重患者还会产生复视。除生理性散光外，各种散光都容易引起视力下降。远视散光由于调节作用视力比近视散光较好。例如同样都是1.00度散光，远视散光的视力一般为0.8左右；近视散光眼的视力则一般在0.5左右；斜位散光看视标时，视标容易产生变形。“长毛”现象，常因为变形而产生视力减弱。因此对斜位散光的矫正轴位尤为重要。

 

　　二、半眯眼看物

散光眼患者由于视力下降，无论是看远处还是看近处均感到模糊不清。小儿患者常常会把眼睑半闭眯成缝隙的习惯，企图以此使物体看得较清晰。

 

　　三、视觉疲劳

散光眼由于无法对焦，大脑很容易产生对像的选择读解。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。

 

找良医网温馨提示：以上就是关于引起儿童散光的原因有哪些的介绍，相信大家也应该有一定的了解了，引起儿童散光的原因有以上三大表现，希望家长在照顾孩子时要多留意，孩子出现以上表现家长要提高警惕，及时带孩子到医院纠正和治疗。让孩子养成良好的生活饮食习惯，形成健康的作息规律，还要注意劳逸结合，减少眼疲劳。最后，祝愿大家身体健康！


","barId":"1773","topicTypeId":"1","topicThemeId":"1026","readLevel":1,"files":"[]","clickNoLikeCount":0,"clickLikeCount":0,"clickCount":853,"score":0,"partCount":0,"replayCount":0,"publishStatus":1,"publishTime":1514862051757,"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":1514862051757,"metaSearch":null,"rn":0,"barTitle":null,"checkcode":null,"forumUser":{"id":"e8f7486fbba411e7a3d800163e04584d","isDel":0,"createAt":1509170261557,"createBy":null,"createName":null,"updateAt":0,"updateBy":null,"updateName":null,"username":"王可可","password":"wrj123123","level":0,"nickName":"搁浅","realName":null,"signName":"总有一天你的努力会收获","head":"http://01luntan.com/ly_img/1520299822787.jpg","phone":null,"mobile":null,"wechat":null,"qq":null,"email":"1516932689@qq.com","address":null,"identityType":7,"userType":2,"isPhoneBind":0,"status":0,"accountSource":0,"isStrangerMsg":0,"departmentId":null,"departmentName":null,"sex":1,"provinceId":"110000","cityId":"","userLevel":0,"modifyNameCount":1},"lyTopicReply":null,"createAtStr":null,"lyBar":null,"lyTopic":null},{"id":"10132","isDel":0,"createAt":1514536352527,"createBy":"e8f7486fbba411e7a3d800163e04584d","createName":"1516932689@qq.com","updateAt":1525250249997,"updateBy":"e8f7486fbba411e7a3d800163e04584d","updateName":"1516932689@qq.com","userId":"e8f7486fbba411e7a3d800163e04584d","title":"散光危害大 如何避免散光加深","content":"

散光是屈光不正中的一种，一般近视的人多多少少都会有些散光。要知道散光的危害很大，度数越深危害越大。那么散光的危害有哪些呢？还有在生活中要如何避免散光加深呢？


\"散光危害大


1、视力降低

散光眼由于光线不能在视网膜上聚焦成一个焦点，所以会导致视力降低。视力降低的程度与散光性质、散光度数及散光方向等因素有关。较高度数的散光（超过200度），甚至可导致儿童发生弱视。

 

　　2、视疲劳

散光眼患者为了提高视力，往往会动用调节来进行自我矫正，而持续的调节力紧张容易引起视疲劳。高度散光眼由于主观努力仍无法提高视力而放弃了调节，视疲劳症状反而不明显。当眼睛持续处于疲劳状态，容易导致眼部疾病，如结膜炎、眼睑炎症（麦粒肿、睑缘炎）和霰粒肿的发生。

 

　　3、视物歪头和眯眼睛

由于双眼有散光，为了看得更清楚，散光患者往往会采取歪斜头位来自我调节，戴镜矫正后多可以恢复。眯眼睛是通过物理学上的针孔效果和裂隙作用，可以在一定程度上提高视力，因此散光患者看远时常眯眼，戴镜后即能矫正这种不良习惯。需要说明的是，眯眼并非散光眼固有的表现，它也同样可发生于近视患者。

 

如何避免散光加深？

 

1、防止长期接连操作电脑。现在很多人都需要长期使用电脑，有的时候下班还利用电脑加班或是玩游戏，那么在生活中我们就应该注意保持眼睛的休息，避免长期使用电脑对眼部造成刺激，最好下班后不要再使用电脑。看书时光线要充足，光线最好来自左后方；看书姿势要正确，并且保持在30-40公分之间的距离，这样可以预防散光。

 

2、调整荧光屏间隔方位。主张间隔为50-70公分，而荧光屏应略低于眼水平方位10-20公分，呈15-20度的下视角。因为视点及间隔能下降对屈光的需要，削减眼球疲惫的几率。

 

3、对于眼部所需要的营养要多补充好。特别是水果蔬菜类的食物多补充，这样的话对眼睛视力可以起到保护作用。

 

4、不吹太久的空调。防止坐位上有气流吹过，并在座位邻近放置茶水，以增加周边湿度。

 

　　5、注意多补充水分。因为水分是构成眼睛的重要成分，所以补充好水分的话可以避免眼睛干涩的情况，对于避免散光问题加重也是有帮助的。

 

找良医网温馨提示：以上就是关于散光的危害及如何避免散光加深的介绍，相信大家也应该有一定的了解了，希望各位定期做身体检查，养成良好的生活饮食习惯，形成健康的作息规律，要注意劳逸结合，不要长时间的疲劳。最后，祝愿大家身体健康！


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散光对于近视的人来说可能一点也不陌生，散光是什么呢？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。那么造成散光的原因有那些呢？下面我们一起来了解一下。


\"散光是什么


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。据相关研究表明，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。

 

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：

 

（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。

 

（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。

 

（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。

 

找良医网温馨提示：以上就是关于造成散光的原因有哪些的介绍，希望能对大家有所帮助，希望各位定期做身体检查，如有身体不适请及时到医院就诊，早日查清病况及早治疗，以免延误治疗。最后，祝愿大家身体健康！


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我们都知道眼科常见的疾病是近视和远视，但是其实散光的发生在我们的生活中也是非常多见的，其实生活中患有散光的患者较多，给患者也带来了比较大的危害，但是还是没能够引起人们高度重视，以至于散光患者越来越年轻化，特别是儿童出现了散光症状，就会影响到学习，那么，说说散光有什么危害?


 

\"


　　1、视疲劳：轻度散光眼患者为了提高视力，往往利用改变调节、眯眼、斜颈等方法进行自我矫正，持续的调节紧张和努力易引起视疲劳，中高度散光由于主观努力无法提高视力，视疲劳症状反而不明显。

 

　　2、视力减退：其程度由于低度中度散光性质、屈光度高低及轴的方向等因素有较大差异，属于生理范围的散光通常对远近视无任何影响，高度数散光，多由于合并径线性弱视或其他异常，视力减退明显，并难以获得良好的矫正视力。

 

　　3、曲率半径差别大：由于角膜和晶状体各经线的曲率半经大小不一致，通常以水平及垂直两个经线的曲率半径差别最大。

 

　　4、儿童散光的危害还包括其他眼病：由于角膜晶体病变引起如圆锥角膜、角膜云照，早期老年性白内障等。

 

　　家长发现孩子眼睛出现眼睛散光，一定要及时矫正，让眼球正常发育。即便成年人出现眼睛散光，进行矫正也有利于减轻视觉疲劳。


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\"散光是由什么原因引起的\"

(一)发病原因

 

散光可由屈光体表面弯曲度的不均一、光学中心偏离视线，或屈光体的屈光率不正常所引起。

 

1.曲率性散光(curvature astigmatism) 如果散光的度数较高，往往发生在角膜。这种散光通常是先天性的。用角膜计测量可以发现正常人眼均存在轻度的散光，几乎是不可避免的。最常见的散光是垂直弯曲度较水平者大，一般约在0.2D。达种轻度的散光可以认为是生理性的，是由于上下眼睑的经常压迫所致。随着年龄的增加，这种生理缺陷有轻度增长的倾向。

 

获得性的散光也较多见。可因角膜病变(最突出的例子是圆锥角膜)、累及角膜的眼外伤(例如眼部手术之后尤其是角膜切口的手术)也可产生同样结果。眼肌切断术后，也可引起轻度散光。角膜散光亦可由眼睑肿瘤压迫所造成。在正常情况下，用手指压迫眼球时，眼睑的收缩或眼外肌的作用，均可产生暂时性的眼球形状的改变，造成不同程度的散光。

 

由晶状体引起的曲率性散光也不少见，但这种病例发生的程度都较轻，由圆锥晶状体引起的散光可达到极为明显的程度，但极为少见。

 

2.光心偏离性散光(astigmatism of optical decentration) 晶状体的位置轻度偏斜，或离开光学系统的轴线，并不少见。但这种先天性的缺陷往往非常轻微而被忽视。外伤引起的晶状体半脱位，使其光学性质变化不大，但所造成的结果非常明显。

 

3.指数性散光(index astigmatism) 这是由于晶状体不同区域的屈光率有少量差异所造成的，是生理性的。这种散光程度轻微，没有实际意义。但因白内障引起的屈光介质变化，则影响极为明显，可以产生各种散光，出现视物变形与多视症等。

 

(二)发病机制

 

眼散光主要来自于角膜散光，故以角膜作为眼的屈光面，光线经过角膜后形成两条焦线，分别称为前焦线F1与后焦线F2。以两焦线为界限，平行光线经角膜屈光后形成的为一个圆锥体形的散光光锥，称为Sturm光锥(Sturm conoid)(图1A)。由图1B中可看出光锥截面的形状，由于位置不同而形成形状各异的散光圈。在前焦线F1稍前，由于AB强主经线的光线已接近聚焦，而CD弱主经线的光线距焦线尚远，光线开散较大，光锥截面呈现横椭圆形(1)。AB经线在F1形成前焦线呈水平线(2)。此后AB经线散开，CD经线尚未聚焦，光锥截面形成比(1)小的横椭圆形(3)，再后AB经线散开与CD经线集合光线的量相等，光锥截面形成圆形的弥散圈(4)，称为最小弥散圈或朦胧圈(circle of least diffusion)。虽然在此处成像亦朦胧不清，但像变形最轻。稍后方由于垂直经线光线散开较大，水平经线光线接近聚焦，光锥截面呈垂直椭圆形(5)。此后水平面、经线CD聚焦于F2，形成一条垂直的后焦线(6)，再往后垂直与水平经线均散开，光锥截面呈垂直椭圆形(7)。在F1与F2两焦线的光锥中不可能形成一个清晰的光学焦点，因而所有的像都是朦胧不清的。

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近视眼镜需要加散光度数吗?配眼镜时验光师拒绝给我加散光度数.或者散光能治疗吗？

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近视有四年了，一直很稳定，想做激光手术。眼睛激光手术后要休息多长时间，以后有什么后遗症吗？

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视物姿势不对有半年多，3月检查后诊断为散光弱视，配镜校正5个月，复查要准备什么？

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男,25岁。医生您好，我有个疑惑想请教下您:
我之前因为飞蚊症去医院检查眼睛时，做了B超，右眼（OD）眼轴27.3mm；但近视度数近年一直比较稳定，大概550度左右。我看很多介绍说眼轴长1mm，度数应该增加300度，按这种推算，我右眼近视度数应该不止550度，所以不明白近视还有散光怎么办是什么原因？也做过眼底检查，包括oct等

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度数675.700。还有100多度散光，能做激光手术吗

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小学开始近视散光，到现在度数比较高，请问医生这种情况可以坐近视眼手术吗？

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近视六百多度散光二百度，近视19年，没有其他疾病，30岁 
左眼近视625，散光150.有眼近视650，散光175.

能做手术痊愈吗


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女儿8岁8个月，一周前感觉坐在教室最后一排看不清电视里面的字，去本地医院眼科检查，医生让散瞳验光，23日去医院短效散瞳验光，验光师说有远视和散光，并于第二天又进行了小瞳验光。医生看过这两次的验光结果后建议再进行阿托品散瞳验光。由于现在正是学习期间，怕影响学习，问医生可以等假期再验光不，但医生说就要自己承担可能存在的风险，所以很担心矛盾。

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男,24岁。眼睛眩光视疲劳看东西不聚焦模糊虚影特厉害普通眼镜不能矫正，，，改善视疲劳和视觉质量，给您磕头了

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孩子五岁，认视力表的时候，裸眼视力：左眼0.5（0.6有时能看到几个），右眼0.8，双眼一起看裸眼视力1.0（均未散瞳）。当地医生说是远视、散光150度，弱视前期，需要尽快配镜治疗，以免错过六岁以前的最佳治疗时机。我提出散瞳检查，那位医生说远视散光没有散瞳必要，对结果影响不大。2岁时怀疑左眼内斜找刘陇黔医生看过，排除了左眼内斜，现在平时目测没有感觉孩子左眼还有内斜。我想带孩子来找你看，可是5.13以前的号都满了。孩子目前如果等一两个月来检查对她的视力会有影响吗？

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　　散光是眼睛的一种屈光不正常表现，与角膜的弧度有关。有些人眼睛的角膜在某一角度区域的弧度较弯，而另一些角度区域则较扁平。造成散光的原因，就是由于角膜上的这些厚薄不匀或角膜的弯曲度不匀而使得角膜各子午线的屈折率不一致，使得经过这些子午线的光线不能聚集于同一焦点，光线不能准确地聚焦在视网膜上形成清晰的物像，这种情况称为散光。

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　　散光的临床表现

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　　1.模糊

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　　视力模糊与散光的程度和方式密切相关。有轻度散光的人视力通常正常，但在看某一距离的物体时可能出现头痛、眼疲劳和视力模糊。有严重散光眼的人视物不清和扭曲。看远看近都不很清楚，近距离工作时间稍长即眼胀头痛阅读窜行或有重影。

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　　2.视力疲劳

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　　对于视网膜上的模糊图像需要不断进行精细调节，加上视物发生扭曲，故散光眼，特别是远视散光眼患者，容易发生视力疲劳。复性远视散光眼的年轻者往往可以用调节进行弥补，根据调节程度可以形成假性单纯性远视散光、假性单纯性近视散光或假性复性近视散光。

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　　3.正常的头位和眼位

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　　双眼有高度不对称散光者，为了看得更清楚，往往采取倾斜头位而导致斜视，散光矫正后可以恢复。高度散光者看远处目标时常常眯眼，达到针孔和裂隙作用，以提高视力。通过针孔或裂隙看东西，可以减少散光对视力的影响。

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　　预防散光从良好用眼习惯做起

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　　人类的眼睛并不是完美的，如果角膜在某一角度的弧度较弯，而另一些角度则较扁平，光线便不能准确地聚焦在视网膜上，这种情况便称为散光。散光患者看东西时会较难细微地看清景物。一般情况下，散光并不会独自出现，患者的眼睛通常都会伴有近视或远视。

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　　据了解，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，都会造成眼皮不当地压迫眼球，而影响其正常的发育，所以戒绝坏习惯才是防止散光的有效做法。而这些坏习惯也常是近视的原因，因此有些人以为近视会造成散光，其实两者没有必然关系。

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　　眼科专家提醒说，眼球的发育，一般要到20岁左右才能定型。如果孩子的散光从小没有矫正好，容易造成弱视，眼睛的散光随着时间的变化会发生改变的，所以，家长要定期带孩子做眼科检查。如果孩子散光出现持续加重，就要注意了，要查明病因。

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　　散光眼应该从良好的用眼习惯做起。

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