difference between cones and rods. and why night birds need more rods than cones
Retina in eye contains two types of cells- Rods and Cones.
Rods are rod shaped while cones are cone shaped.
Rods are active during dim light or during night time as compared to cones which are required for bright light and colour vision.
Rods are present in large number as compared to cones which are fewer in number.
Birds such as owl are able to see only during night time because they contain large number of rods which help them in vision during night time. These birds have their eyes sensitive to bright light so unable to see during day time.
Rods are rod shaped while cones are cone shaped.
Rods are active during dim light or during night time as compared to cones which are required for bright light and colour vision.
Rods are present in large number as compared to cones which are fewer in number.
Birds such as owl are able to see only during night time because they contain large number of rods which help them in vision during night time. These birds have their eyes sensitive to bright light so unable to see during day time.