甲型流感病毒H16亞型核酸檢測試劑盒

廣州健侖生物科技有限公司

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甲型流感病毒H16亞型核酸檢測試劑盒

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【公司名稱】 廣州健侖生物科技有限公司
【市場部】    楊永漢

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【騰訊  】 2042552662
【公司地址】 廣州清華科技園創(chuàng)新基地番禺石樓鎮(zhèn)創(chuàng)啟路63號(hào)二期2幢101-103室

這六條肌肉互相密切配合，使眼球協(xié)調(diào)*地上下左右自由轉(zhuǎn)動(dòng)。當(dāng)我們平時(shí)動(dòng)腦筋時(shí)，眼球就會(huì)滴溜溜地轉(zhuǎn)動(dòng)；當(dāng)我們心不在焉時(shí)，眼球就會(huì)漫無目的的轉(zhuǎn)動(dòng)。人的內(nèi)心活動(dòng)也可以從眼球的轉(zhuǎn)動(dòng)中表現(xiàn)出來。眼球在向各個(gè)方向轉(zhuǎn)動(dòng)時(shí)，總有一條以上肌肉在起主要作用，其他幾條肌肉起協(xié)調(diào)作用。雙眼的動(dòng)作必須*，當(dāng)眼球向右注視時(shí)，右外直肌和左內(nèi)直肌必須同時(shí)相等地收縮，否則就不能獲得雙眼單視。但是當(dāng)這支配眼球轉(zhuǎn)動(dòng)的六條肌肉中只要有一條或幾條發(fā)炎、外傷或神經(jīng)障礙，雙眼肌肉動(dòng)作就不協(xié)調(diào)，如右外直肌收縮了，而左內(nèi)直肌收縮慢了一點(diǎn)或收縮力量不夠，眼球的轉(zhuǎn)動(dòng)就會(huì)受到限制，或使眼球偏向一側(cè)，形成斜視，這時(shí)看東西就會(huì)特別費(fèi)勁；或一個(gè)物體可以看成兩個(gè)，造成視物雙影，即復(fù)視。首先應(yīng)了解從視網(wǎng)膜接受視信息，到在大腦視皮層形成視覺的整個(gè)神經(jīng)沖動(dòng)傳遞的徑路，即視路。來自視網(wǎng)膜神經(jīng)節(jié)細(xì)胞的神經(jīng)纖維，通過鞏膜篩板，匯集成視神經(jīng)。在視神經(jīng)段內(nèi)，視網(wǎng)膜鼻、顳側(cè)來的纖維同行，到視交叉，視網(wǎng)膜鼻側(cè)部位的神經(jīng)纖維互相交叉到對(duì)側(cè)，與該側(cè)視神經(jīng)未交叉的視網(wǎng)膜顳側(cè)部位的神經(jīng)纖維構(gòu)成視束，一直伸人到外側(cè)膝狀體，在此交換神經(jīng)元后進(jìn)人視放射，再經(jīng)內(nèi)囊進(jìn)到大腦枕葉的視皮層。當(dāng)光線射人眼內(nèi)，經(jīng)眼的屈光系統(tǒng)(角膜、晶體、玻璃體)的折射，聚焦在視網(wǎng)膜上，經(jīng)過神經(jīng)節(jié)細(xì)胞層和雙極細(xì)胞層，達(dá)到感光細(xì)胞層，感光細(xì)胞內(nèi)富含由維生素A與蛋白的結(jié)合體之感光物質(zhì)，稱為感光色素(視紫紅質(zhì)與視紫藍(lán)質(zhì))，感光色素在光的作用下，產(chǎn)生一系列光化學(xué)變化——褪色分解，并產(chǎn)生示能量，將光能轉(zhuǎn)化為電能，發(fā)生電位，進(jìn)而引起視覺沖動(dòng)，通過視路傳導(dǎo)，到達(dá)大腦枕葉后部距狀溝的皮質(zhì)視中樞，產(chǎn)生視覺。故某種原因，如炎癥、外傷、腫瘤、血管病等，導(dǎo)致自角膜至枕葉視中樞其間的任何部位的病變，都可引起視力障礙。

引起視力障礙的病變所在部位甚為廣泛，因而造成視力障礙的原因也多種多樣。

1.炎癥 是引起視力障礙zui常見的原因。

(1)感染性：由細(xì)菌、病毒、衣原體、真菌、寄生蟲等引起的角膜炎、角膜潰瘍、虹膜睫狀體炎、脈絡(luò)膜炎、眼內(nèi)炎、全眼球炎、眼眶蜂窩織炎等。

(2)非感染性：泡性角膜炎、角膜基質(zhì)炎、葡萄膜炎(包括虹膜睫狀體炎、脈絡(luò)膜炎)、交感性眼炎、原田病、Behcet病等。

These six muscles work closely with each other so that the eyeballs move freely up, down, left and right in unison. When we usually use our brains, the eyeball will spin off; when we are absent-minded, the eyeball turns aimlessly. People's inner activities can also be reflected in the rotation of the eye. When the eye turns in all directions, there is always more than one muscle playing a major role and the other several muscles playing a coordinating role. The action of both eyes must be consistent, when the eye to the right when the right lateral rectus and left rectus must be equally contracted, or you can not get binocular vision. However, when there is one or more inflammation, trauma or nerve disorder in the six muscles that control the rotation of the eye, the muscles of both eyes are not coordinated. For example, the right external rectus muscle contracts while the left internal rectus muscle contracts a little or shrinks Not enough, the rotation of the eye will be limited, or the eye to one side, the formation of strabismus, then see things will be particularly strenuous; or an object can be seen as two, resulting in double vision, double vision. First of all should be understood from the retinal receptive information to the visual cortex in the visual cortex of the entire nerve impulse transfer path, that is, the visual pathway. The nerve fibers from the retinal ganglion cells converge into the optic nerve through the scleral sieve. In the optic nerve segment, the retina nose, the temporal side of the fiber counterparts to the optic chiasm, the nerve fibers of the retina nasal cross each other to the contralateral, and the lateral optic nerve does not cross the temporal retina temporal nerve fibers constitute the optic tract, Has been extended to the lateral geniculate body, where the exchange of neurons into the visual radiation, and then by the internal capsule into the occipital lobe of the visual cortex. When the light shoots into the eye, the refraction of the ocular refractive system (cornea, lens, vitreous body) focuses on the retina, passes through the ganglion cell layer and the bipolar cell layer to reach the photoreceptor layer, which is enriched by A combination of vitamin A and protein sensitizers, known as the light-sensitive pigments (rhodopsin and hyaluronic acid blue), the light-sensitive pigments in the light of the role, resulting in a series of photochemical changes - fade decomposition and produce energy, will Light energy into electrical energy, the occurrence of potential, and then cause visual impulse, through the visual pathway to reach the back of the occipital lobe of the brain cortex as the center of vision, resulting in vision. For some reason, such as inflammation, trauma, cancer, vascular disease, resulting in any part of the lesion between the cornea to the occipital lobe as center, can cause visual impairment.

The lesions that cause visual impairment are located in a wide range of places, and the causes of visual impairment are diverse.

1. Inflammation is the most common cause of visual impairment.

(1) Infectious: Keratitis, corneal ulcer, iridocyclitis, choroiditis, endophthalmitis, all-eye inflammation, orbital cellulitis caused by bacteria, viruses, chlamydia, fungi and parasites.

(2) non-infectious: keratitis, corneal inflammation, uveitis (including iridocyclitis, choroiditis), sympathetic ophthalmia, Harada disease, Behcet disease.