![Ocular refraction and the shadow test . d II, figure 85 illustrates the effect. Now rotate the lens 90, so that the vertical straight line also ap-pears unbroken and passing through the Ocular refraction and the shadow test . d II, figure 85 illustrates the effect. Now rotate the lens 90, so that the vertical straight line also ap-pears unbroken and passing through the](https://l450v.alamy.com/450v/2akmcbt/ocular-refraction-and-the-shadow-test-er-through-diiiferent-meridians-1-through-the-axis-vthrough-the-principal-meridian-ii-iii-and-iv-through-intermediate-meridians-angles-to-the-axis-in-the-plane-of-the-principal-meridian-the-greatestrefraction-occurs-lenses-63-cylindrical-lenses-are-numbered-in-both-the-inch-and-dioptricsystems-the-same-as-spherical-lenses-their-power-so-indicated-refersto-the-refractive-value-of-the-cylinder-in-its-principal-meridian-letfigure-64-represent-a-convex-cylindrical-of-400-d-in-the-plane-ofthe-axis-its-power-is-o-while-in-the-plane-of-the-p-2akmcbt.jpg)
Ocular refraction and the shadow test . d II, figure 85 illustrates the effect. Now rotate the lens 90, so that the vertical straight line also ap-pears unbroken and passing through the
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