Assertion: raptor | /r/HasAspect | vision
Facets:
value: compared to 200,000 for humans
type: OTHER
Source sentences:
text: Raptors have acute hearing and vision, which is estimated to be eight to ten times that of humans.
text: —raptors (birds of prey) have vision eight times sharper than humans—thanks to higher densities of photoreceptors in the retina (up to 1,000,000 per square mm in Buteos, compared to 200,000 for humans), a high number of neurons in the optic nerves, a second set of eye muscles not found in other animals, and, in some cases, an indented fovea which magnifies the central part of the visual field.