simple eye
US /ˈsɪm.pəl ˌaɪ/
UK /ˈsɪm.pəl ˌaɪ/

1.
Punktauge, Ocellus
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).
Insekten haben oft sowohl Facettenaugen als auch Punktaugen (Ocellen).
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The spider's simple eyes are primarily used for detecting changes in light and shadow.
Die Punktaugen der Spinne werden hauptsächlich zur Erkennung von Licht- und Schattenveränderungen verwendet.