Take Class 8 Tuition from the Best Tutors
Affordable fees 1-1 or Group class Flexible Timings Verified Tutors Search in
Asked by Mayur Last Modified
Answer The iris is the colored part of the eye that surrounds the pupil, and it plays a crucial role in controlling the amount of light entering the eye. The primary functions of the iris are to regulate the size of the pupil and thus control the amount of light that reaches the retina.
The iris contains muscles, known as the sphincter pupillae and the dilator pupillae, which control the size of the pupil. In bright light conditions, the sphincter pupillae contract, causing the pupil to constrict and become smaller. This reduces the amount of light entering the eye, preventing the retina from being overwhelmed by excessive brightness.
Conversely, in low light conditions, the dilator pupillae contract, causing the pupil to dilate and become larger. This allows more light to enter the eye, improving visibility in dim environments. The automatic adjustment of pupil size by the iris is known as the pupillary reflex, and it helps to maintain optimal visual conditions in various lighting situations.
Related Questions
Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com
Ask a QuestionRelated Lessons
Recommended Articles
6 Exam Hall Tips To Follow, For Every Good Student
Appearing for exams could be stressful for students. Even though they might have prepared well, they could suffer from anxiety, tension etc. These are not good for their health and mind. However, following a few exam preparation tips can save them from all these and help them to score good marks. Let’s find out all...
Read full article >
How To Choose The Right School For Children?
Quality education does not only help children to get a successful career and life, but it also hugely contributes to society. The formal education of every child starts from school. Although there are numerous schools, parents find it challenging to choose the right one that would fit their child. It is difficult for them...
Read full article >
6 Healthy Habits of School Children
While schools provide formal education to the children, the home is where they start learning about things informally. Parents think that schools will take the initiative to educate their children. Well, this is partially true, as parents also play an essential role in bringing up their child. For the development of particular...
Read full article >
Top Benefits of e-Learning
With the current trend of the world going digital, electronic renaissance is a new movement that is welcomed by the new generation as it helps makes the lives of millions of people easier and convenient. Along with this rapidly changing movement and gaining popularity of Internet, e-Learning is a new tool that emerging...
Read full article >
Looking for Class 8 Tuition ?
Learn from the Best Tutors on UrbanPro
Are you a Tutor or Training Institute?
Join UrbanPro Today to find students near youThe best tutors for Class 8 Tuition Classes are on UrbanPro
The best Tutors for Class 8 Tuition Classes are on UrbanPro
26
