*A shekara ta 1825, masanin falaki dan Burtaniya Sir George Airy ya ƙirƙiro ruwan tabarau na siliki don magance matsalar astigmatism, ya ƙara faɗaɗa karfin tabarau ɗin.* Karanta dukkan bayanin a nan 👇👇👇 https://bakandamiya.com/tabarau/