Ever Wander How Your Eyes Adjust in The Dark?

on Thu 14 Nov


Ever Wonder How Your Eyes Adjust in The Dark?

Leaving a bright office, lit street or room to complete darkness can leave you feeling disorientated until your eyes catch up with you.

Our vision range varies depending on the light conditions which can come from three parts of the eye:

1.The pupil

The eye shares similarities to a camera, with different layers and lenses to expand and contract...letting in more or less light. The pupil works in a similar fashion while bright light can block the amount of light reaching the retina which opens wide in darkness.

  1. Rod and Cone Cells

Eyes use two types of cells to see and accept light; rods and cones. The cone cells perceive detail and colours. However, rod cells can only see black and white.

  1. Photo-pigments

Both rods and cones contain light-sensitive chemicals which when exposed to light, can go through a chemical reaction. This chemical reaction makes the electrical activity that is key to night vision. Intense light can cause the pigments to decompose and reduce the sensitivity to dim light. The darkness can cause the molecules to regenerate during ‘darkness adaptation’.


Team Proto-col