simple eye
US /ˈsɪm.pəl ˌaɪ/
UK /ˈsɪm.pəl ˌaɪ/
1.
单眼, 眼点
a small, simple eye found in many invertebrates, typically consisting of a few photoreceptor cells and a lens, capable of detecting light intensity but not forming detailed images
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Insects often have both compound eyes and simple eyes (ocelli).
昆虫通常既有复眼，也有单眼（眼点）。
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The spider's simple eyes are primarily used for detecting changes in light and shadow.
蜘蛛的单眼主要用于检测光线和阴影的变化。