The present invention is a tear production measuring sheet that has a pair of measuring strips adapted to be used for the right and left eyes and is disposed side by side in such a manner that the strips have a common scale. Each of the measuring strips is separated from the measuring sheet by a cut...http://www.google.fr/patents/US5046507?utm_source=gb-gplus-shareBrevet US5046507 - Tear production measuring sheet and package therefor
Tear production measuring sheet and package therefor
