The Retinal Image and Visual Angle
As the above sketch shows, a real image of the object is formed on the retina between points and . (See visual system). For small angles, the size of this retinal image is
where is the distance from the nodal points to the retina, about 17 mm.
Read more about this topic: Visual Angle
Famous quotes containing the words image, visual and/or angle:
“The brawling of a sparrow in the eaves,
The brilliant moon and all the milky sky,
And all that famous harmony of leaves,
Had blotted out man’s image and his cry.”
—William Butler Yeats (1865–1939)
“To write well, to have style ... is to paint. The master faculty of style is therefore the visual memory. If a writer does not see what he describes—countrysides and figures, movements and gestures—how could he have a style, that is originality?”
—Rémy De Gourmont (1858–1915)
“The inhabitants of earth behold commonly but the dark and shadowy under side of heaven’s pavement; it is only when seen at a favorable angle in the horizon, morning or evening, that some faint streaks of the rich lining of the clouds are revealed.”
—Henry David Thoreau (1817–1862)