oblique-astigmatism picture # 173716577224 (https://69.media.tumblr.com/8c0ee2af48e607ede0240eb61d0ea549/tumblr_p8eqpm1KFP1rke7deo1_500.jpg)
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original: https://oblique-astigmatism.tumblr.com/post/173716577224