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line

English translation: One line of the eye chart

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02:25 Jun 21, 2005
English to English translations [PRO]
Medical - Medical: Instruments / Implantable contact lens
English term or phrase: line
Please see:
Before PRK, no eye had an uncorrected visual acuity (UCVA) of 20/40 or better. Twelve months after PRK, 16 eyes (53.33%) had a UCVA of 20/40 or better. After PRK, best corrected visual acuity (BCVA) improved 1 line or more in 14 eyes (46.66%) over the preoperative values, and 15 eyes (50.00%) had the same BCVA as before PRK. Mean pre-PRK refraction of -5.00 diopters (D) ¡À 2.50 (SD) decreased significantly to -0.25 ¡À 0.50 D at 12 months (P < .001). At 12 months, the spherical equivalent was within ¡À1.00 D of emmetropia in 27 eyes (90.00%). No vision-threatening complications occurred
From:
http://www.ascrs.org/publications/jcrs/absnov9.htm

Question: Can some eye experts here help explain what "line" means in "best corrected visual acuity (BCVA)"?

Thank you very much in advance!
Jianming Sun
Local time: 05:44
English translation:One line of the eye chart
Explanation:
I believe it means that the eyesight improved such that the person could read one more line on the chart.
Selected response from:

Can Altinbay
Local time: 17:44
Grading comment
Thanks!
4 KudoZ points were awarded for this answer

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Summary of answers provided
4 +4One line of the eye chart
Can Altinbay


  

Answers


25 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +4
One line of the eye chart


Explanation:
I believe it means that the eyesight improved such that the person could read one more line on the chart.


Can Altinbay
Local time: 17:44
Native speaker of: Native in EnglishEnglish, Native in JapaneseJapanese
PRO pts in category: 4
Grading comment
Thanks!

Peer comments on this answer (and responses from the answerer)
agree  Balasubramaniam L.: Yes, that seems to be it. http://www.answers.com/topic/eyeglass-prescription?hl=eye&hl...
26 mins
  -> Thank you.

agree  Elizabeth Rudin: Improved one line or more on the eye chart/visual acuity chart.
6 hrs
  -> Thank you.

agree  Angela Dickson
12 hrs
  -> Thank you.

agree  xxxAlfa Trans
15 hrs
  -> Thank you.
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