The "image-forming eyes" are found in both compound eyes and double-lens eyes.

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Image-forming eyes refer to the ability to form detailed images, which is characteristic of single-lens eyes (like those in humans and other vertebrates) and not compound eyes. Compound eyes, found in insects and some crustaceans, are made up of many small units called ommatidia, each with its own lens and photoreceptor cells, and are better at detecting movement and wide visual fields but do not form images as sharply as single-lens eyes do. Double-lens eyes are not a standard classification in the study of eye types; eyes are typically classified as single-lens or compound.

The "Image-Forming Eyes" Are Found in Both Compound Eyes and Double-Lens