Ophthalmic OpticsQuestion 13 of 100
Chromatic aberration is caused by what?
a.Uneven frame pressure
b.Scratches on the lens
c.Different wavelengths of light focusing at different points
d.Anti-reflective coating
Explanation
Because a lens refracts short (blue) wavelengths more than long (red) wavelengths, colors focus at slightly different points, producing color fringing. Materials with a low Abbe value show it most.
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