Question

Fill in the blanks with suitable words. Then give the reason why the word is suitable.
Iris pattern is used for individuals _________.

Answer 1

Iris is a flat-ring shaped structure present behind the eye cornea. It also has an adjustable opening known as the pupil. This structure helps in providing an individual eye colour.

Complete answer:
The iris is a thin, annular structure in the eye, responsible for controlling the diameter and size of the pupil and thus, the amount of light reaching the retina. Along with the pupil, it is responsible for regulating the amount of light that enters the eye. Movement in the muscular iris leads to shrinkage of the pupil if there is too much light, but in the case of dim light, the pupil dilates. This involuntary action is controlled by the brain. The iris is made up of smooth muscle fibres and connective tissues. The pupil size is controlled by the movement of the pupillary sphincter muscle and dilator muscle. In an individual, the iris comprehends image through an automated biometric identification. The image is derived from mathematical patterns. The pattern of iris helps in the identification of individuals. The iris consists of two layers: the front pigmented fibrovascular layer known as stroma and, beneath the stroma, pigmented epithelial cells. The pupil is the eye aperture.

Note: In humans, the iris is an annular structure that controls the diameter and size of the pupil and thus, the amount of light entering the retina is controlled. The iris of the eye helps in determining the eye colour of an individual.