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To analyze age for prescription of presbyopic glasses and f..:

Kavitha Chikkanayakanahalli Venugopal ; Pavana Acharya ; N Narendra...
http://www.jcor.in/article.asp?issn=2320-3897;year=2023;volume=11;issue=3;spage=168;epage=171;aulast=Venugopal.  , 2023