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The narrow band of the electromagnetic spectrum that is visible to the human eye and is responsible for our sense of sight. This range typically spans from approximately $380$ nanometers (violet) to $750$ nanometers (deep red). Getty Images
read more about visual light spectrum ...The order of colors, from shortest to longest wavelength, is commonly remembered by the mnemonic ROY G BIV (Red, Orange, Yellow, Green, Blue, Indigo, Violet, though Indigo is often omitted).
Energy outside this spectrum (UV and IR) is largely absorbed by the ocular media (cornea and lens), which prevents it from reaching the retina but poses damage risks to those structures.
The human eye is most sensitive to light in the yellow-green region, around $555 ext{ nm}$, under bright light conditions.
No. Infrared ($750 ext{ nm}$ and longer) is generally not visible, though some very near-infrared wavelengths can sometimes be perceived under specific conditions.
High-energy visible (HEV) blue light (near the UV range) is a concern due to its potential to damage retinal cells through oxidative stress.
A deficiency in color vision, usually genetic, caused by a malfunction or absence of one or more of the three types of cone photoreceptors that detect the visual light spectrum.