मेदिकेल-बिगियाना गोसा मेगन-नारसिनथाय आरो गाज्रि सोरां थासारिफोर सिङाव फोलावबायथानाय मावनायफोरखौ ग्ल’खमानि गुबै जाहोन सानो।
Medical science regards severe eye-strain and prolonged working under bad lighting conditions as the chief cause of glaucoma.