corneas

简明释义

英[ˈkɔːnɪəz]美[ˈkɔrniz]

n. [解剖]角膜（cornea 的复数形式）

英英释义

单词用法

同义词

反义词

例句

1.Corneas showed good glucose metabolism.

角膜代谢状态良好。

2.It is possible on penetrating keratoplasty with preserved corneas by desiccation in clinical use.

在临床上，干燥保存角膜有可能作为穿透角膜移植材料应用。

3.If you have very thin corneas, you might be a better candidate for LASEK because the procedure allows your doctor to remove less of your cornea.

你的眼科医生在手术前的眼睛测试时使用很专业的仪器确定手术面积——需要变平或者变弯的角膜面积，然后绘制你的眼睛图，并且从角膜上精确地移除组织。

4.The freeze-drying rabbit corneas were used on animal experiment for keratoplasty in rabbit eyes, and the grafts remained clear postkeratoplasty.

利用真空冷冻干燥法贮藏的兔角膜进行了移植实验，手术成功，术后植片透明。

5.If the eyes are not protected with goggles in high wind chill conditions, the corneas of the eyes may freeze.

在高风寒的条件下，如果没有佩戴护目镜的话，眼角膜可能会被冻住。

6.This will provide the academic foundation for total penetrating keratoplasty in which the cryopreserved donor corneas and limbus regions are used.

探讨对部分穿透性角膜移植手术后剩余的角膜缘材料加以保存和利用的可行性，为建立角膜缘组织库奠定基础。

7.Most jellyfish don't have eyes, but sea wasps have several clusters of them on their bells, complete with lenses, irises and corneas.

大部分的水母没有眼睛，但“海黄蜂”的伞状体上却有好几组眼睛，具有完整的晶状体、虹膜和眼角膜。

8.In some cases, patients may need a transplant of their corneas due to severe damage.

在某些情况下，患者可能由于严重损伤需要进行角膜移植。

9.The doctor examined the patient's corneas to check for any signs of infection.

医生检查了病人的角膜以查看是否有感染的迹象。

10.After the surgery, the surgeon ensured that the corneas were healing properly.

手术后，外科医生确保角膜正在正确愈合。

11.People with dry eyes often experience discomfort in their corneas.

干眼症患者常常感到他们的角膜不适。

12.Contact lenses sit directly on the corneas and can cause irritation if not cleaned properly.

隐形眼镜直接放在角膜上，如果不正确清洁可能会导致刺激。

作文

The human eye is a remarkable organ, enabling us to perceive the world around us. One of its most critical components is the cornea, which plays a vital role in vision. The term corneas refers to the plural form of the 角膜, the transparent front part of the eye that covers the iris and pupil. It serves as a protective barrier against dirt, germs, and other harmful elements, while also helping to focus light onto the retina. Understanding the function of the corneas is essential for appreciating how our eyes work. The 角膜 is responsible for approximately 65-75% of the eye's total focusing power. When light enters the eye, it first passes through the corneas, which bends (or refracts) the light rays before they reach the lens. This refraction is crucial for clear vision, as it ensures that images are properly focused on the retina at the back of the eye.Moreover, the corneas are composed of five layers, each serving a specific purpose. The outermost layer, known as the epithelium, provides a smooth surface and protects the underlying tissues from injury and infection. The next layer, the Bowman's layer, adds strength to the corneas. Beneath this is the stroma, which makes up the bulk of the 角膜 and contains collagen fibers that maintain its shape and transparency. The Descemet's membrane, another layer, acts as a barrier against infections, while the innermost layer, the endothelium, regulates fluid balance within the corneas to keep them clear.Injuries or diseases affecting the corneas can lead to significant vision problems. Conditions such as keratitis, which is inflammation of the 角膜, can result from infections, dry eyes, or exposure to harmful chemicals. Additionally, corneal dystrophies are a group of genetic disorders that affect the structure of the corneas, leading to clouding and vision impairment. In severe cases, a corneal transplant may be necessary to restore vision. During this procedure, a damaged 角膜 is replaced with a healthy one from a donor, highlighting the importance of organ donation and the need for awareness about eye health.To maintain healthy corneas, it is essential to practice good eye care. Regular eye exams can help detect any issues early on, allowing for prompt treatment. Wearing protective eyewear during activities that pose a risk to the eyes, such as sports or working with hazardous materials, can prevent injuries to the 角膜. Additionally, using lubricating eye drops can alleviate dryness and discomfort, helping to keep the corneas hydrated and functioning properly.In conclusion, the corneas play an indispensable role in our ability to see clearly. Understanding their structure and function can help us appreciate the complexities of our vision and the importance of taking care of our eyes. By prioritizing eye health and seeking regular check-ups, we can ensure that our 角膜 remain healthy and functional throughout our lives.

人眼是一个非凡的器官，使我们能够感知周围的世界。它最关键的组成部分之一是角膜，在视觉中发挥着至关重要的作用。术语corneas指的是角膜的复数形式，即覆盖虹膜和瞳孔的透明前部。它作为一种保护屏障，抵御污垢、细菌和其他有害元素，同时也帮助将光线聚焦到视网膜上。理解corneas的功能对于欣赏我们的眼睛如何工作至关重要。角膜负责大约65-75%的眼睛总聚焦能力。当光线进入眼睛时，它首先穿过corneas，在到达晶状体之前弯曲（或折射）光线。这种折射对于清晰的视觉至关重要，因为它确保图像正确聚焦在眼睛后部的视网膜上。此外，corneas由五层组成，每一层都有其特定的用途。最外层称为上皮层，提供光滑的表面并保护下方组织免受伤害和感染。下一层是Bowman层，为corneas增加强度。在此之下是基质，构成了角膜的主要部分，包含保持其形状和透明度的胶原纤维。Descemet膜是另一层，作为感染的屏障，而最内层的内皮层则调节corneas内的液体平衡，以保持其清晰。影响corneas的损伤或疾病可能导致显著的视力问题。诸如角膜炎等疾病是角膜的炎症，可能由感染、干眼或接触有害化学物质引起。此外，角膜营养不良是一组影响corneas结构的遗传性疾病，导致模糊和视力障碍。在严重的情况下，可能需要进行角膜移植来恢复视力。在这个过程中，受损的角膜被来自捐赠者的健康角膜替换，突显了器官捐赠的重要性和对眼健康的关注。为了保持健康的corneas，实践良好的眼部护理至关重要。定期的眼科检查可以帮助及早发现任何问题，从而及时治疗。在进行可能对眼睛造成风险的活动时，如运动或处理危险材料，佩戴保护眼镜可以防止对角膜的伤害。此外，使用润滑眼药水可以缓解干燥和不适，帮助保持corneas的水分和正常功能。总之，corneas在我们清晰视力的能力中扮演着不可或缺的角色。理解它们的结构和功能可以帮助我们欣赏视觉的复杂性以及照顾眼睛的重要性。通过优先考虑眼部健康和定期检查，我们可以确保我们的角膜在整个生命中保持健康和功能。