Visual Organs or Photoreceptor

Photoreceptors of insects includes

1. Compound eyes

Scientists Say: Compound Eye

2. Simple eyes or dorsal ocelli

Look into my ocelli! Simple eyes. – Ray Cannon's nature notes

3. Lateral ocelli or stemmata

Stock photo of European hornet (Vespa crabro) head close up showing the  three ocelli…. Available for sale on www.naturepl.com