চশমায় কাচের লেন্সের ব্যবহার কেন কমছে? | The Business Standard 

দেশে এখনও হাতে গোনা পাঁচ-ছয়টি কারখানা আছে যারা চশমার কাচের লেন্স তৈরি করে। তবে প্লাস্টিকের লেন্সের দাপটে চাহিদা কমে গেছে হাতে তৈরি এসব লেন্সের। পুরো শিল্পটিই এখন রয়েছে হারিয়ে যাওয়ার পথে।
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