石原氏色盲测试图

An Ishihara color blindness test plate showing the number 45, centered in a perfect circular field made of many randomly sized colored dots, with the digits formed from muted salmon and reddish-brown circles against a dense background of olive green, moss, mustard, and yellow-green dots, flat diagnostic print design, clean vector-like graphic, high contrast but natural test-card palette, evenly lit, no shadows, top-down straight-on view, crisp edges, medical vision test chart style, minimal square composition on a darker olive dotted background, high-resolution.