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Table 1 Spatial resolution of a selection of animal eyes

From: Charting Evolution’s Trajectory: Using Molluscan Eye Diversity to Understand Parallel and Convergent Evolution

Name Resolution/inter-receptor angle (Δϕ, °)
Eagle 0.0036 (Land and Nilsson 2002)
Human 0.007 (Land and Nilsson 2002)
Octopus (cephalopod) 0.011 (Land and Nilsson 2002)
Cat 0.05 (Land and Nilsson 2002)
Strombus luhuanus (gastropod) 0.23 (Land 1981)
Honeybee 0.95 (Land and Nilsson 2002)
Planorbaruis corneus (gastropod) 1.4 (Zieger and Meyer-Rochow 2008)
Scallop (Pecten maximus, bivalve) 1.6 (Land and Nilsson 2002)
Lymnaea stagnalis (gastropod) 2.5 (Zieger and Meyer-Rochow 2008)
Littorina littorea (gastropod) 4.5 (Land and Nilsson 2002)
Fruit fly 5.0 (Land and Nilsson 2002)
Nautilus (cephalopod) 8.0 (Land and Nilsson 2002)
Cepaea nemorais (gastropod) 8.0 (Zieger and Meyer-Rochow 2008)
Trichia hispida (gastropod) 13.0 (Zieger and Meyer-Rochow 2008)
Helix aspersa (gastropod) 14.5 (Hamilton and Winter 1982)
Giant clam (Tridacna maxima, bivalve) 20.0 (Land 2003)
Ark clam (Barbatia cancellaria, bivalve) 32.0 (Nilsson 1994)a
Planaria (flatworm) 35.0 (Land and Nilsson 2002)
  1. aBased on acceptance angle Δρ