顾客：你好，我要配眼镜。    服务员：好的，请先来这边验光。    （......）    顾客：请问我的眼睛多少度？    服务员：左眼450度，右眼500度。    顾客：哦，谢谢。     A: Excuse me, I would like to buy new eyeglasses.
B: Ok. Would you please check your eyes this way?
...
A: How much degree is my eyse?
B: 450 for left eye and 500 degrees for right eyes.
A: Ok, thank you.

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To get the right lenses for one's eyeglasses, the degrees of refraction of one's eyes must first be known. Lesson Content: Customer: Good day, I want to have glasses made to my eyesight.
Attendant: All right, first come this way to have your eyesight tested.
(......)
C: Please tell me what are the degrees of refraction of my eyes?
A: Left eye: 450 degrees, right eye: 500 degrees.
C: Oh, thank you.

• customer [´kʌstəmə]   n.顾客，买主，主顾   (初中英语单词)
• summary [´sʌməri]   a.&n.摘要(的)   (英语四级单词)