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0
Seren White
07/12/2025
Biology
the brain and eye
79
•
7 Dec 2025
•
Understanding the Connection Between Brain and Eye
Seren White
@serenwhite_muwd
1 / 4
The Brain's Control Centre
Think of your brain as mission control for your entire body - it's constantly processing information and keeping you alive without you even thinking about it. Scientists use MRI and CT scans to study the brain safely, revealing its complex structure of interconnected parts.
The cerebrum is the brain's superstar, making up the largest portion and handling all your thinking, learning, and sensory processing. Its thin outer layer, the cerebral cortex, is where the magic of vision, hearing, and learning happens.
Your hypothalamus might be small, but it's incredibly important - it keeps your body temperature stable and controls hormones through the pituitary gland. Meanwhile, the cerebellum beneath your cerebrum ensures you can walk, maintain your posture, and coordinate your movements smoothly.
Quick Fact: Your medulla oblongata sits at the top of your spinal cord and automatically controls your breathing and heart rate - thank goodness you don't have to remember to breathe!
How Your Eye Works
Your eye is like a sophisticated camera that never stops recording. The cornea acts as both a protective shield and the first lens that focuses light, while the pupil controls how much light enters - just like a camera's aperture.
The lens is remarkable because it can change shape to focus light perfectly on the retina at the back of your eye. This shape-changing is controlled by ciliary muscles working with suspensory ligaments - they're like a perfectly coordinated team adjusting your internal camera settings.
Your retina contains millions of light-sensitive cells that convert light into electrical signals. These signals travel through the optic nerve straight to your brain, where they're transformed into the images you see.
Remember: Light passes through your eyeball and gets refracted (bent) by both the cornea and lens to focus precisely on the retina - it's physics in action!
Focusing Near and Far
Your eyes perform an amazing trick called accommodation - they automatically adjust to focus on objects at different distances. When you look at your phone, your lens becomes more convex (rounded) as the ciliary muscles contract and suspensory ligaments go slack.
For distant objects like a football across the pitch, the process reverses completely. Your ciliary muscles relax, the suspensory ligaments contract, and your lens flattens to focus properly on faraway things.
Unfortunately, not everyone's eyes are perfectly shaped. Short-sightedness (myopia) occurs when your eye is longer than normal, causing light to focus in front of the retina. Long-sightedness (hyperopia) is the opposite - your eye is shorter, so light focuses behind the retina.
Eye Fact: These vision problems are incredibly common, affecting millions of people worldwide, but they're easily correctable with the right lenses.
Correcting Vision Problems
Modern medicine has brilliant solutions for vision defects that work on simple physics principles. For myopia , opticians use concave lenses that spread light out slightly before it hits your eye's lens, allowing distant objects to focus correctly on the retina.
Hyperopia requires the opposite approach - convex lenses that bend light inwards more strongly. This extra refraction helps your eye focus on close objects that would otherwise appear blurry.
These corrective lenses essentially compensate for your eye's shape, working with your natural lens to create perfect focus. Whether in glasses or contact lenses, they're precisely calculated to give you sharp vision at the distances you need most.
Modern Solution: Today's corrective lenses can be incredibly thin and lightweight, making vision correction more comfortable than ever before.
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Most popular content: Structure of the Eye
Most popular content in Biology
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Students love us — and so will you.
4.9/5
App Store
4.8/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Understanding the Connection Between Brain and Eye
Seren White
@serenwhite_muwd
Your brain and eyes work together as an incredible team to help you see and make sense of the world around you. Understanding how these organs function isn't just fascinating - it's essential knowledge that explains everything from why you... Show more
The Brain's Control Centre
Think of your brain as mission control for your entire body - it's constantly processing information and keeping you alive without you even thinking about it. Scientists use MRI and CT scans to study the brain safely, revealing its complex structure of interconnected parts.
The cerebrum is the brain's superstar, making up the largest portion and handling all your thinking, learning, and sensory processing. Its thin outer layer, the cerebral cortex, is where the magic of vision, hearing, and learning happens.
Your hypothalamus might be small, but it's incredibly important - it keeps your body temperature stable and controls hormones through the pituitary gland. Meanwhile, the cerebellum beneath your cerebrum ensures you can walk, maintain your posture, and coordinate your movements smoothly.
Quick Fact: Your medulla oblongata sits at the top of your spinal cord and automatically controls your breathing and heart rate - thank goodness you don't have to remember to breathe!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
How Your Eye Works
Your eye is like a sophisticated camera that never stops recording. The cornea acts as both a protective shield and the first lens that focuses light, while the pupil controls how much light enters - just like a camera's aperture.
The lens is remarkable because it can change shape to focus light perfectly on the retina at the back of your eye. This shape-changing is controlled by ciliary muscles working with suspensory ligaments - they're like a perfectly coordinated team adjusting your internal camera settings.
Your retina contains millions of light-sensitive cells that convert light into electrical signals. These signals travel through the optic nerve straight to your brain, where they're transformed into the images you see.
Remember: Light passes through your eyeball and gets refracted (bent) by both the cornea and lens to focus precisely on the retina - it's physics in action!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Focusing Near and Far
Your eyes perform an amazing trick called accommodation - they automatically adjust to focus on objects at different distances. When you look at your phone, your lens becomes more convex (rounded) as the ciliary muscles contract and suspensory ligaments go slack.
For distant objects like a football across the pitch, the process reverses completely. Your ciliary muscles relax, the suspensory ligaments contract, and your lens flattens to focus properly on faraway things.
Unfortunately, not everyone's eyes are perfectly shaped. Short-sightedness (myopia) occurs when your eye is longer than normal, causing light to focus in front of the retina. Long-sightedness (hyperopia) is the opposite - your eye is shorter, so light focuses behind the retina.
Eye Fact: These vision problems are incredibly common, affecting millions of people worldwide, but they're easily correctable with the right lenses.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Correcting Vision Problems
Modern medicine has brilliant solutions for vision defects that work on simple physics principles. For myopia , opticians use concave lenses that spread light out slightly before it hits your eye's lens, allowing distant objects to focus correctly on the retina.
Hyperopia requires the opposite approach - convex lenses that bend light inwards more strongly. This extra refraction helps your eye focus on close objects that would otherwise appear blurry.
These corrective lenses essentially compensate for your eye's shape, working with your natural lens to create perfect focus. Whether in glasses or contact lenses, they're precisely calculated to give you sharp vision at the distances you need most.
Modern Solution: Today's corrective lenses can be incredibly thin and lightweight, making vision correction more comfortable than ever before.
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
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The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user