您現(xiàn)在的位置: Language Tips> Audio & Video> Special Speed News  
 





 
When eye problems involve diseases of retina
[ 2007-07-30 09:38 ]

        

        Download

 

This is the VOA Special English Health Report.

Theretinais the sensory tissue in the back part of the eye. It gathers light and captures images from the lens, much like film in a camera. The retina processes these images into signals that travel through the optic nerve to the brain.

Diseases of the retina can cause vision loss over time.

A thirty-year-old listener in Vietnam says he cannot see well and doctors have told him he has retinal degeneration. This is the loss or destruction of the sensory tissue of the retina. Trinh Phuong Bac says he first developed problems in his right eye when he was a child. He would like to know more about this disease.

Doctor Emily Chew is a deputy division director at the National Eye Institute, one of the National Institutes of Health in the United States. She says it is true what doctors have told our listener: there is no cure for retinal degeneration.

She says most cases are considered genetic. Scientists have been trying to develop gene treatments for it, and in recent years there have been some reports of possible progress. But Doctor Chew says these studies of experimental gene therapies have so far only involved animals.

Recently, the National Eye Institute reported the findings of a study of diet and a disease called retinopathy. It says the omega-three fatty acids EPA and DHA, both found in fish, protected mice against the development and progression of retinopathy. The study showed that decreasing omega-six fatty acids in the diet also helped. The study was published this month in Nature Medicine.

The findings could be useful to research into retinopathy in humans, including a common cause of vision loss in diabetics. A separate form can lead to permanent blindness in babies born too early. Doctor Chew, however, says this study may have no connection to treating retinal degeneration.

She also says there is disagreement about whether taking high levels of vitamin A could reduce the severity of the disease. She says there was a study which suggested that vitamin A helped some people with retinitis pigmentosa. But she notes that other investigators have disputed these findings.

Retinitis pigmentosa, or R.P, is a form of retinal degeneration. R.P. is the name for a group of diseases that can be found as early as when a person is a teenager. People with R.P. have genes that give incorrect orders to cells that receive light. As a result, the retina can begin to self-destruct.

And that's the VOA Special English Health Report, written by Caty Weaver. I'm Mario Ritter.


retina : 視網(wǎng)膜

點(diǎn)擊進(jìn)入更多VOA慢速

(來(lái)源:VOA  英語(yǔ)點(diǎn)津姍姍編輯)

 
 
相關(guān)文章 Related Stories
 
         
 
 
 
 
 
         

 

 

 
 

48小時(shí)內(nèi)最熱門

   

本頻道最新推薦

     
  《追夢(mèng)女郎》(精講之六)
  World trade talks break down
  New British leader shapes first post-Blair cabinet
  England goes smoke-free in public buildings July 1
  School ends, and so does our foreign student series

論壇熱貼

     
  請(qǐng)問“老鄉(xiāng)”這個(gè)詞怎么翻譯?
  C-E: how to say "路盲"?
  請(qǐng)問“老鄉(xiāng)”這個(gè)詞怎么翻譯?
  C-E: how to say "路盲"?
  各位,“相親”英語(yǔ)怎么說(shuō)?
  指紋上的ridges and loops是什么意思?






主站蜘蛛池模板: 特级无码a级毛片特黄| 久久99精品波多结衣一区| 美女被狂揉下部羞羞动漫| 国产精品自在线| 中国国产高清免费av片| 真实乱l仑全部视频| 国产黄a三级三级看三级| 亚洲av中文无码乱人伦在线观看| 视频久re精品在线观看| 国产肉体xxxx裸体137大胆| 久久精品国产精品亚洲精品| 老子影院午夜伦手机不卡无| 国产精品无码一区二区三区不卡| 三级演员苏畅简历及个人资料简介| 欧美黑人疯狂性受xxxxx喷水 | 成人午夜小视频| 亚洲色欲久久久综合网东京热 | 99精品国产一区二区三区不卡| 欧美办公室系列观看丝袜| 国产亚洲精品精品国产亚洲综合 | 国产大片b站免费观看推荐| 91免费福利视频| 日韩在线播放全免费| 凹凸国产熟女精品视频| 69堂在线观看| 怡红院色视频在线| 久久国产精品范冰啊| 男彩虹用的app小蓝| 国产亚洲美女精品久久久2020| 1204国产成人精品视频| 天天摸天天碰成人免费视频| 久久香蕉国产线看观看精品yw| 深夜福利影院在线观看| 国产在线无码视频一区二区三区 | 四虎一影院区永久精品| 97热久久免费频精品99| 日本牲交大片无遮挡| 人人狠狠综合久久亚洲婷婷| 自拍偷在线精品自拍偷| 国产麻豆交换夫妇| 一本一本久久a久久精品综合 |