Results
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| Property | Organism | Value | Units | ID | Details |
|---|---|---|---|---|---|
| Fraction of ~347 seabird species that are globally threatened and critically endangered as of 2010 | Birds | globally threatened 28%: critically endangered 5% | % | 117199 | Friesen MR, Beggs JR1... |
| Presence of lamellar branching in corneal stroma compared to that of fish | Vertebrates | in amphibians 2 times that of fish: in birds >10 times that of fish | times of lamellar branching in fish | 117198 | Koudouna E et al., Evolution... |
| Diameter of uniformly thin collagen fibrills that comprise the corneal stroma (see Comments section for organism) | Vertebrates | ~32 | nm | 117197 | Koudouna E et al., Evolution... |
| Fraction of dry weight of cornea that is represented by fibrillar collagen | Human Homo sapiens | 70 | % of dry weight of cornea | 117196 | Koudouna E et al., Evolution... |
| Fraction of corneal thickness that is represented by corneal stroma | Human Homo sapiens | 90 | % of corneal thickness | 117195 | Koudouna E et al., Evolution... |
| Refractive index | Vertebrates | in cornea 1.376: in water 1.333: crystalline lens 1.4-1.5 | unitless | 117194 | Koudouna E et al., Evolution... |
| Fraction of refractive power in eye that is accountable to cornea focusing light onto the retina | Human Homo sapiens | >2/3 | of refractive power | 117193 | Koudouna E et al., Evolution... |
| Number of receptors and ganglion cells per visual degree (pvd) | American kestrel Falco sparverius | receptors pvd in the central fovea 8300: receptors pvd in the temporal fovea 7700: ganglion cells pvd in the central fovea 3000: ganglion cells pvd in the temporal fovea 700 | receptors or ganglion cells/visual degree | 117192 | Bringmann A. Structure... |
| Shape of the foveal pit and maximal visual acuity (spatial resolving power) of various bird species | Birds | Table - link | N/A | 117191 | Bringmann A. Structure... |
| Ratio between cones (in the foveola), midget bipolars and midget ganglion cells (in the fovea walls) | Primates | cones:midget bipolars:midget ganglion cells=1:2:2 | unitless | 117190 | Bringmann A. Structure... |
| Two possible depths of foveal pit | Birds | shallow 80-120 or deep 190-240 | µm | 117189 | Bringmann A. Structure... |
| Minimum interommatidial angles for insect species | Insect | Table - link | ˚ (degrees) | 117188 | Land MF. Visual acuity... |
| Size of main, cylindrical, “tubular” eye | Brownsnout spookfish Dolichopteryx longipes | height ~6: width 4 | mm | 117187 | Wagner HJ, Douglas RH... |
| Number of photoreceptors contained in ocellar retina | Cockroach Periplaneta | ~10,000 | photoreceptors | 117186 | Mizunami M. Functional... |
| Diameter of lens of ocelii (simple eye) | Cockroach Periplaneta | ~0.7 | mm | 117185 | Mizunami M. Functional... |
| Width of eye and diameter of pupil | Chiton Acanthopleura granulata | eye width 65 - 80: pupil diameter 35 - 50 | µm | 117184 | Speiser DI, Eernisse DJ... |
| Number of generations, under selection for improved visual acuity, required to produce a focused camera-type eye from a patch of light-sensitive epithelium | Metazoa animals | <400,000 | generations | 117183 | Fernald RD. Casting a... |
| Number of times eyes evolved independently | Metazoa animals | 40 | times or more | 117182 | Fernald RD. Casting a... |
| Time octopus and vertebrate eye arose | Metazoa animals | octopus eye arose ∼480: vertebrate eye arose 640 to 490 | million years ago | 117181 | Fernald RD. Casting a... |
| Number of eye-related genes (~3.5% of the genome) | Fruit fly Drosophila melanogaster | 501 | genes | 117180 | Fernald RD. Casting a... |