div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader043fdocumentsnetreader043viewer20220315165d05b5b088c993dd5e8c82cdhtml5page1jpg target=_blank img data-url=document-these-lenses-have-been-used-to-correct-astigmatism-in-the-early-1930s-theyhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: · These lenses have been used to correct astigmatism In the early 1930s they were replaced by lenses of toric design Being flat sphcyl and planocyl lenses generally gve poorer- loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader043fdocumentsnetreader043viewer20220315165d05b5b088c993dd5e8c82cdhtml5thumbnails1jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader043fdocumentsnetreader043viewer20220315165d05b5b088c993dd5e8c82cdhtml5page2jpg target=_blank img data-url=document-these-lenses-have-been-used-to-correct-astigmatism-in-the-early-1930s-theyhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: · These lenses have been used to correct astigmatism In the early 1930s they were replaced by lenses of toric design Being flat sphcyl and planocyl lenses generally gve poorer- loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader043fdocumentsnetreader043viewer20220315165d05b5b088c993dd5e8c82cdhtml5thumbnails2jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imagea href=https:reader043fdocumentsnetreader043viewer20220315165d05b5b088c993dd5e8c82cdhtml5page3jpg target=_blank img data-url=document-these-lenses-have-been-used-to-correct-astigmatism-in-the-early-1930s-theyhtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: · These lenses have been used to correct...