A refractive defect of a lens or other optical system that prevents light rays from converging at a single point,resulting in a blurred or imperfect image.是什么意思_A refractive defect of a lens or other optical system that prevents light rays from converging at a single point,resulting in a blurred or imperfect image.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句