Eye twinkle

• Nocturnal animals have a more rod-like retina than cone cells, aiding photopic vision under dim light.

• The choroid coat layer, called the tapetum lucidum, has a reflective surface made of materials like guanine crystals, riboflavin crystals, or collagenous fibres.

• The tapetum lucidum acts as a mirror, absorbing light not absorbed by retinal cells and reflecting it back to the outer layers.

• This dual light reception allows clear vision even in dark conditions.