大跌眼镜

(fig.) to be astounded

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

large fall

to fall / to tumble / to trip / (of prices etc) to drop / Taiwan pr. [die2]

eye / small hole / crux (of a matter) / CL:隻|只[zhi1],雙|双[shuang1] / classifier for big hollow things (wells, stoves, pots etc)

to be taken aback

spectacles / eyeglasses / CL:副[fu4]

mirror / lens