|
Un article trouvé pour ce sujet.
 |
|
|
|
|
|
|
|
|
Percentage change in refractive error |
2019-04-04 |
|
Ammara pose la question :
Hi, I'm trying to figure out how a paper I'm looking at has found a percentage from the numbers below. its a paper comparing two lenses. it says that the new lenses 'slowed the progression of refractive error by approximately 50%'.
the refractive error with the old lenses was -2.26 after two years it was -3.28
the refractive error with the new lenses was -2.24 after two years the refractive error is - 2.75
Thank you so much for your help it is most appreciated!
Penny Nom lui répond. |
|
|
|
