Human corneas have successfully been 3D printed for the first time by scientists at Newcastle University in England.

英国纽卡斯尔大学的科学家首次成功采用3D技术打印出人类眼角膜。

By mixing stem cells from a healthy donor1 cornea with alginate, a gel derived2 from seaweed, and collagen, researchers managed to create a “bio-ink” solution that can be printed.

This bio-ink then would be successfully expelled out of the printer in concentric circles in the shape of a cornea in less than 10 minutes, according to a paper published in Experimental Eye Research.

“Our unique bio-gel — a combination of alginate and collagen — keeps the stem cells alive while producing a material which is stiff enough to hold its shape but soft enough to be squeezed out the nozzle of a 3D printer,” said lead researcher Che Connon in a press release.

Connon’s team also showed it is possible to create a cornea that matches a patient’s unique specifications3.

By taking the dimensions of the patient’s actual cornea with scans, scientists can use the data to print a cornea that matches its size and shape.

The 3D printed corneas will now have to undergo further testing but it is hoped the technique could be in regular use within five years.

Professor Connon said the research could help with the worldwide shortage of corneas for transplant.

英语网址大全

1 donor
n.捐献者；赠送人；(组织、器官等的)供体
参考例句：
In these cases,the recipient usually takes care of the donor afterwards.在这类情况下，接受捐献者以后通常会照顾捐赠者。
The Doctor transplanted the donor’s heart to Mike’s chest cavity.医生将捐赠者的心脏移植进麦克的胸腔。
2 derived
vi.起源；由来；衍生；导出v.得到( derive的过去式和过去分词 )；（从…中）得到获得；源于；（从…中）提取
参考例句：
Many English words are derived from Latin and Greek. 英语很多词源出于拉丁文和希腊文。 来自《简明英汉词典》
He derived his enthusiasm for literature from his father. 他对文学的爱好是受他父亲的影响。 来自《简明英汉词典》

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