The human eye contains a certain protein called rhodopsin that changes shape when it is exposed to light. When rhodopsin absorbs light, part of it undergoes a chemical change. This is how eyes sense the presence of light.

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Chemistry

Belinda

1 January, 18:38

The human eye contains a certain protein called rhodopsin that changes shape when it is exposed to light. When rhodopsin absorbs light, part of it undergoes a chemical change. This is how eyes sense the presence of light.

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Damian Pena · Answer 1

Damian Pena 1 January, 20:27

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Angela Lindsey · Answer 2

The human eye contains a molecule called 11-cis-retinal that changes conformation when struck with light of sufficient energy. The change in conformation triggers a series of events that results in an electrical signal being sent to the brain. The minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 {/rm kJ}/{/rm mol}.