◎國際新聞中心
A US doctor is trying to pioneer a laser treatment that changes patients’ eye colour. Dr Gregg Homer claims 20 seconds of laser light can remove pigment in brown eyes so they gradually turn blue. He is now seeking up to $750,000 of investment to continue clinical trials.
一名美國醫師正嘗試率先進行一種改變病患眼睛顏色的雷射治療。荷馬醫師宣稱，雷射光照射20秒可移除棕色眼睛中的色素，讓棕色眼珠逐漸轉成藍色。他現在正尋求高達75萬美元的投資，繼續進行臨床實驗。
However, other eye experts urge caution because destroying eye pigment can cause sight problems if too much light is allowed to enter the pupil.
不過，其他眼睛專家呼籲謹慎，因為如果讓太多光進入瞳孔，摧毀眼睛的色素可能造成視力問題。
The process involves a computerised scanning system that takes a picture of the iris and works out which areas to treat. The laser is then fired, hitting one spot of the iris at a time. When it has hit every spot it then starts again, repeating the process several times.
這種手術是以電腦掃描系統拍下虹膜照片後，決定要治療哪個區塊 ，接著啟動雷射，一次點擊虹膜的一個點。直到每個點都點擊過後，再重新開始這個過程，之後重複數次。
After the first week of treatment, the eye colour turns darker as the tissue changes its characteristics. Then the digestion process starts, and after a further one to three weeks the blueness appears. Since the pigment - called melanin - does not regenerate the treatment is irreversible.
治療後第1週，因為細胞組織改變特徵，眼睛顏色變深。接著開始消化過程，再經過1到3週，藍色出現了。因為黑色素不會再生，治療後眼睛無法變回原來的顏色。
新聞辭典
work out：片語，了解、解決。例句：Don’t worry about anything - it’ll all work out in the end.（不要擔心，最後一切都會解決的。）
regenerate：動詞，再生。例句：A lizard can regenerate its tail.（蜥蜴的尾巴可以再生。）
irreversible：形容詞，不能逆轉的、無法挽回的。例句：Smoking has caused irreversible damage to his lungs.（抽菸對他的肺造成無法挽回的傷害。）
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