My understanding: EM Radiation is carried via photons - which enter our eyes and activate receptors depending on the amount of energy the photons have when hitting them.

At what point do we "lose" photons which are above or below our visible light spectrum?

• Does the cornea at the front of the eye deflect those photons - (They don't enter the eye at all)

• Does it enter our eye, but the degree of refraction cause it not to hit the retina?

• Does it enter our eye and hit the retina, but the retina somehow doesn't pick it up?

• Does it enter our eye and hit the retina, the retina picks it up, but somewhere in our image processing the input is ignored when passed on to the brain?

• Something else?

_{I am looking for the answer that is more pertaining to the physics of the eye and EM Radiation, but if the Biology.SE is a more appropriate place for this question, please let me know.}

My understanding: Electromagnetic radiation is carried via photons - which enter our eyes and activate receptors depending on the amount of energy the photons have when hitting them.

At what point do we "lose" photons which are above or below our visible light spectrum?

• Does the cornea at the front of the eye deflect those photons (They don't enter the eye at all)?
• Does it enter our eye, but the degree of refraction cause it not to hit the retina?
• Does it enter our eye and hit the retina, but the retina somehow doesn't pick it up?
• Does it enter our eye and hit the retina, the retina picks it up, but somewhere in our image processing the input is ignored when passed on to the brain?
• Something else?

_{I am looking for the answer that is more pertaining to the physics of the eye and electromagnetic radiation, but if the Biology Stack Exchange is a more appropriate place for this question, please let me know.}

My understanding: EM Radiation is carried via photons - which enter our eyes and activate receptors depending on the amount of energy the photons have when hitting them.

At what point do we "lose" photons which are above or below our visible light spectrum?

• Does the cornea at the front of the eye deflect those photons - (They don't enter the eye at all)

• Does it enter our eye, but the degree of refraction cause it not to hit the retina?

• Does it enter our eye and hit the retina, but the retina somehow doesn't pick it up?

• Does it enter our eye and hit the retina, the retina picks it up, but somewhere in our image processing the input is ignored when passed on to the brain?

My understanding: EM Radiation is carried via photons - which enter our eyes and activate receptors depending on the amount of energy the photons have when hitting them.

At what point do we "lose" photons which are above or below our visible light spectrum?

• Does the cornea at the front of the eye deflect those photons - (They don't enter the eye at all)

• Does it enter our eye, but the degree of refraction cause it not to hit the retina?

• Does it enter our eye and hit the retina, but the retina somehow doesn't pick it up?

• Does it enter our eye and hit the retina, the retina picks it up, but somewhere in our image processing the input is ignored when passed on to the brain?

• Something else?

_{I am looking for the answer that is more pertaining to the physics of the eye and EM Radiation, but if the Biology.SE is a more appropriate place for this question, please let me know.}