Otto Wichterle

photo: www.digital-guide.cz

Otto Wichterle was a Czech chemist, best known for his invention of modern soft contact lenses. He was born on October 27, 1913 and died on August 18, 1998. 
 

 

Photo: Ananthu Manoharan

place: Kollam

 

World No Tobacco Day is observed on

Ans: May 31