Anatomy of The Human Eye Ball | Structure & Function | Cornea & Sclera

#drnajeeb #medicines #medicaleducation #pharmacology #humaneye #eyeanatomy
Anatomy of The Human Eye Ball | Structure & Function | Cornea & Sclera
Like this video?
Sign up now on our website at www.DrNajeebLectures.com to access 1000+ Exclusive videos on Basic Medical Sciences & Clinical Medicine. These are premium videos (NOT FROM KZbin). All these videos come with English subtitles & download options. Sign up now! Get Lifetime Access for a one-time payment of $45 ONLY!
Sign up now on our website at members.drnajeeblectures.com/
---------------------------------------------------------------------------------------------------------------------------
Why sign up for premium membership? Here's why!
Membership Features for premium website members.
1. More than 1000+ Medical Lectures.
2. Basic Medical Sciences & Clinical Medicine.
3. Mobile-friendly interface with android and iOS apps.
4. English subtitles and new videos every week.
5. Download option for offline video playback.
6. Fanatic customer support and that's 24/7.
7. Fast video playback option to learn faster.
8. Trusted by over 2M+ students in 190 countries.
---------------------------------------------------------------------------------------------------------------------------
▬▬▬▬▬▬▬▬▬▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
00:00:00 Introduction to the structure of eyeball
00:00:57 Detailed explanation on coats/Layers of the eyeball
00:17:39 Purpose of the three coats/layers of the eyeball 17:39
00:18:29 What is Lens, vitreous humour and aqueous humour
00:21:00 Review of the basic structure of the eyeball
---------------------------------------------------------------------------------------------------------------------------
Humans have two eyes, situated on the left and the right of the face. The eyes sit in bony cavities called the orbits, in the skull. There are six extraocular muscles that control eye movements. The front visible part of the eye is made up of the whitish sclera, a colored iris, and the pupil. A thin layer called the conjunctiva sits on top of this. The front part is also called the anterior segment of the eye.
The eye is not shaped like a perfect sphere, rather it is a fused two-piece unit, composed of an anterior (front) segment and the posterior (back) segment. The anterior segment is made up of the cornea, iris, and lens. The cornea is transparent and more curved and is linked to the larger posterior segment, composed of the vitreous, retina, choroid, and the outer white shell called the sclera. The cornea is typically about 11.5 mm (0.45 in) in diameter, and 0.5 mm (500 μm) in thickness near its center. The posterior chamber constitutes the remaining five-sixths; its diameter is typically about 24 mm (0.94 in). The cornea and sclera are connected by an area termed the limbus. The iris is the pigmented circular structure concentrically surrounding the center of the eye, the pupil, which appears to be black. The size of the pupil, which controls the amount of light entering the eye, is adjusted by the iris' dilator and sphincter muscles.
Light energy enters the eye through the cornea, through the pupil, and then through the lens. The lens shape is changed for near focus (accommodation) and is controlled by the ciliary muscle. Photons of light falling on the light-sensitive cells of the retina (photoreceptor cones and rods) are converted into electrical signals that are transmitted to the brain by the optic nerve and interpreted as sight and vision.
---------------------------------------------------------------------------------------------------------------------------
Join this channel to get access to perks:
Sign up now on our website at members.drnajeeblectures.com/...
/ @doctornajeeb
Follow us on Facebook :- / drnajeeb
Follow us on Instagram :- / drnajeeblectures

[@DoctorNajeeb]

If you like the video please give us a thumbs up and leave and subscribe to support our work. Thank you and happy learning!

[@YourEducationwithSamim]

Sir I am Samim Ahamed Student of Optometry.. your explanation it's too clear thank you sir and.. love you sir❤️

[@tanyavs7103]

Good

[@jayantibiswas5059]

Thank you sir

[@chikaraeke9433]

You are wonderful and blessed to teach I love your lecture 💯

[@RajuDas-wd5lk]

You are the best teacher

[@Doctor-vf6ui]

I have never seen a better teacher online. Dr Najeeb, your impact is greater than you can imagine.

[@dashachess4204]

Wow ! This man deserves an applause. Our teacher like every other teacher in anatomy class rushes through the material because its an intensive course... but you don't really learn anything except outside study. I am glad this man took 20 mins of his class to teach what is now to me truly is the basics of the eye (which seemed really difficult for self study until I watched this video). Thank you so much !

[@avtawf]

Thank you very much for uploading these videos onto KZbin. Some people who don't have the money to buy a full subscription really benefit from these lectures. Thank you again.

[@astronaut9276]

One of the best Teachers in the Field of Medicine.... Taught everything from Basic..Even a 8th grader will understand the lecture..Such a Simple Language... ThankYou So Much !!! Dr.Najeeb Sir

[@DoctorNajeeb]

Glad you enjoyed the crystal clear concepts ❤️

[@carinasmgrodrigues]

Dear Professor Najeeb, You are an excelent teacher. It is so wonderful to see people using their gift. I think you should know you have a legion of fans in (at least) one Portuguese University. Thank you so much! Blessings to you, I hope you have a life full of love, joy and abundance.

[@sayyadidarbarcaterersshabb175]

I love you❤😘🤟

[@marytgeorge]

I looked for animated videos to teach my 6 yearl old child about the eye but this was the clearest video out there. No animation, no background music but she understood everything! This is teaching at its best. Thank you for posting.

[@fahim5656]

You serious? i am seeing this video In my premed

[@imigi]

😂😂😂 I'm studying this in med-school

[@mahjabeen3662]

​@@imigi😂😂😂

[@saramalik7645]

India needs more such teachers like u sir...ur lectures r very beneficial fr us sir... Thanku sir...from pulwàma kashmir

[@AmeerHamza-tu7dx]

Sister he is from pakistan not from india😊

[@aarifitoo1862]

Means we r from same UT M from Anantnag

[@nikitasharma9679]

I wish there were more teachers who taught like you and bothered to know that we understand. Great work

[@shakeelahmadjan3213]

He once came to our university a very noble and down to earth person I ever meet. for first time I understand this topic.

[@DoctorNajeeb]

Thank you so much for your love and support. :)

[@indiafirst7955]

Where does he teach?????

[@rashmirana5254]

Those who disliked the video mst be those teachers who r jealous of this great teacher.....who envy his teaching skills...how someone can dislike his vid.he is the only one who can make someone understand the most difficult topics of medical science

[@reemasaleh5568]

you are such a wonderful dr ,U make the medicine for us so easy Bunch of thnx to you Dr Najeeb

[@sadiyas1815]

dear sir, this was the best explanation ever. this is the first time i understood anatomy of eye. thank u very much sir.

[@cosmaskibet5579]

Thanks Dr.Najeeb your lectures are very much impressive and understanding .I find it interesting and attractive to watch .

[@syedahmed-qz5tf]

Sadia s same here

[@syedosama4265]

Same here,it was such a supercalifragilistic concept delivered by brilliant and intelligent man remarkably.

[@komalrajput1979]

Thnx a lot

[@changeeyecolor3891]

👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍

[@Doctor-vf6ui]

Every medical student needs to see your lectures. This may be the future of learning. New teachers should learn from you. All of the love from Africa

[@DoctorNajeeb]

Thank you for your love and support!

[@AweSome-tb6cs]

I am studying in class 11 and my dream to become a doctor..... This is the first video I watched in your channel and I understood the anatomy of eye very well.... Thanks Sir....

[@fahriyakhan2484]

dear sir,,,you explained it in such an easy way that i picked everything right at the moment you were explaining it....thank you for explaining it in such an easy way....

[@mohamedusman1186]

I'm amazed on your knowledge in eye anatomy and most importantly you are an awesome teacher who explains the concepts very clearly and detaily :) Thank you, Dr.

[@beixixu7086]

Fantastic lecture! I love how you repeat the terms again and again to help students remember, and engage them in the process. Thanks for your great work, sir!

[@ryklin1]

great energy and teaching style. Thank you. So insightful. So clear. Great delivery of material. it would be a pleasure for someone to take your classes in real-life. I never though of the iris as a circle, thank you for elucidating. We need to always remember the geometry is spherical, and we are dealing with a unique coordinate space of the inside of a sphere. This influences the geometry of all the structures especially the neural layer. Nice emphasis on what are transducers. very interesting that the pigmented layer continues far forward. Why would you hypothesis the pigmented layer evolved all the way forward to the iris in the mammalian eye? Perhaps it plays multiple roles. I wish you had touched on the ganglionic layer, but that may too advanced for this lecture. Bravo. Very basic structure of eyeball indeed. I'm going to watch your other videos.

[@saidgutierrez2253]

It's amazing that you keep uploading videos. Best teacher ever!

[@santughosh8676]

It's like a movie every thing I have remembered 😛

[@DoctorNajeeb]

Glad to hear that. Happy learning ❤️

[@officialgadariya5690]

I like it

[@officialgadariya5690]

Your teaching

[@Aaruu111]

Yes ryt.. I'm nursing student..and i like all lecture... nyccc explanation and easily understandable that 👍👍❤️❤️❤️

[@16bayana]

Dr.najeeb .. The best of the best 🌹

[@abrarshah3738]

He is a great teacher i could ever get, he explains from bottom deep to high yield all you wanna know, keep going sir you're Amazing.

[@manikanyamotupally8279]

Hi sir.. I'm a optometry 1st year student.... Ur explaning each and every part very clearly explaing sir... Really 🙌 to u sir

[@Traveller530]

In which university

[@mutaharajamal6713]

I'm an opthalmic student... Frst time I came to understand anatomy of eye without any doubts, damnn explaining sir.....

[@puddleduck100]

Thank you for sharing your knowledge, the best lecture on eye anatomy I've had so far.

[@madhabilata2248]

I got admission in boptimetry, and I hope that I get a teacher like you in my college. Thank you sir.

[@soushthabbhakta1234]

Sir you are a gift from the Almighty to medical students..... Lots of love and respect sir...

[@DoctorNajeeb]

Thank you for the appreciation! Keep watching ❤️

[@alishbasiddiqui7987]

Sir your lecture is too much helpful for me I am student of Psychology I couldn't understand about the course of biology , in whole time when I think about biology I feel crying I think I got supply but now your lectures is so helpful for me Thank you 😊☺️

[@SaimaKhan-xk9rs]

amazing lecturer sir ke jo lec hai liver pe main ne us pe presentation ke and i got 95% out of 100%

[@SaimaKhan-xk9rs]

thankyou sir

[@kalachashma7943]

I just started Ocular anatomy and I found this on you tube...... Excellently explained by sir....... Whole structure of eye..... Thank you sir

[@kadappanrm5796]

Thank you sir I understand everything I am a optometry student now 1st year thank you I have many doubts in this but now all cleared thank you sir

[@user-jy2rc2pn7l]

Hello my friend

[@cherryfaithlabtang4690]

Hello Dr. Najeeb. Been learning a lot from you. From Biochemistry to anything. I hope you come to Philippines and teach Medicine. God bless.

[@annamoi2334]

What an excellent teacher! You made the eye make sense! Thank you!

[@-sandeep-2917]

Few days back I came to know abt this wonderful channel... Now I'm addicted with this Thanks soo much sir 🙏🙏

[@donolanoel9507]

Omg he's so great I wish he was actually my teacher!

[@faryalfarooq8733]

ma sha Allah it was great 💫🌸

[@mystic9321]

in first 5 seconds he got all my attention my brain and my heart. i understood every bit of his lecture and he is just amazing top of the class i should say just no words im a fan. literally the exact way in which i wanted to learn the key words the gesture just GOD BLESS YOU SIR. GOD BLESS YOU. GOD BLESS YOU. Ma sha Allah you are gifted.

[@DoctorNajeeb]

Thank you so much for your valuable feedback! 💗

[@neurotherapywithgovindapte8215]

Great Teacher. People like Dr. Najib is the treasure of the world.

[@rushikudke4483]

Your there Is one person on the earth who has the power of teaching if he would be your teacher na then no one can be middle in my success You are great man I love your teaching

[@soumyadipghosh3961]

I wanna beg happy teacher's day to this great teacher

[@radwagamal4810]

thank you very much✋ i'm from egypt

[@maxamednuurcramaan8091]

i swear there is no doctor in this world like dr najeeb this doctor is genius and he knows how to get the point

[@nooreenkhan3818]

wow! me from afghanistan we have very week lectures in uni and being a doctor is my eager but now i am very happy to find u!

[@Aarifunnoor]

WOW!! That was so fluid. #Incredible teaching. Thankyou. 😊

[@ksawera3633]

Beautifully explained!! thank you :)

[@poojarawat1421]

Wow a teacher should be like this. I understood everything clearly. Thank u so much

[@winnerfromindia2309]

Thanx Dr. Najeed. Spend your best time with eye anatomy lecture given.

[@muhammadyaseenmahtaab7820]

May ALLAH reward you with the Good...Super......

[@farhankhan-py6cw]

Sir all your sessions are really helpful ..

[@ramabordawekar495]

Sir your students are so lucky because they get to learn from such an excellent teacher! I wish you were my teacher. You make concepts so easy to understand

[@angiemenapa]

Very helpful indeed! I'm watching because I have myopia and wish to learn more. I was also a nursing student who stopped half way into my programme. Planning to go back and I see myself using your videos too! I read reviews and I'm looking forward to enrolling in your video lectures in the future! I might even specialise in ophthalmology!

[@zainmohaz8854]

I'm watching from kenya 🇰🇪 ... you're the best lecturer, good and clear explanation 👌

[@49saad42]

He deserves more than 10.million subscribers.. Damn legend person 😍😘

[@kfueitianoptometrist8720]

Kash ap hmary teacher hty .....wrna mid mn optometry k es topics ko smjhny mn mushkil na hti mjhy.......boht achiii trah smjhaya apny...Jazak Allah

[@naushabaqureshi7952]

you are the best teacher of anatomy .... crystal clear concepts ...from basics to complex....

[@Mikesco10]

by far the best teachers i have come across are dr. najeeb and dr. hussein sattar from pathoma. both of you are legends

[@akashscreation2595]

Just amazing class , I'm a student of Optometry I understand your class very properly. Thank you Sir 🙏🏻 please upload a video on Angle of Anterior chamber

[@TiaraOluwaDoxa]

Thanks so much sir....The video was helpful, i never really did understood the anatomy of the eye until your video. God bless you

[@najim_ali128]

You deserve a nobel prize in teaching 🙏

[@QTalent100]

I enjoy learning from teachers that are excited about what they are teaching. Love your energy thanks for sharing.

[@somnathmalekar8376]

Humaney

[@eddcs1901]

thank you very much doctor najeeb

[@siriinhassan2755]

thanks dr najiib

[@Drqazi247]

Wow, that is so great simple explanation of human eye I want to teach like you!

[@dr.hananahmed2743]

Thank you very much ... finally i understand it 🌸

[@ghaforakatkota41]

Thank you very much sir

[@reiasarkar1752]

Dear sir,just nothing to say..u r a great teacher i have ever seen

[@drabdirahmansaladibrahim4602]

dr najeeb is one of the best no question .....i will be thankful for ever

[@joerecaro6408]

Thank you, this greatly helped me in understanding the human eye.

[@stargamingstarmuneeb270]

its really a amazing lecture on eye i didn't understand this structure ever but u 've done this

[@luckdjinasimeon7]

I just want to say that this professor is out here saving college student lives broh!

[@Dr.IrtazaRehman]

Helpful overview

[@saakshikokil3246]

We really do need teachers like him.

[@baisakhipal2689]

Really very nice ....which I can't express my words....this gives me more understanding about this things& also experience...thank u so much ...sir...

[@kasandrahogan227]

I just want to stay thank for for this, I’m a med student and I wish you were my professor!

[@javedhasan950]

Dr. Najeeb lectures is too good, excellent

[@mystical1803]

Sir u explained in detaild superb no words 2 say,

[@surgicalutopia]

Thankyou sir for such grt enlightenment.... I am specialising in faciomaxillary surgery .. and I have found your vedios really comprehendable

[@asabemaiyaki]

LOve the video. It made learning anatomy of the eye easy to remember. Thank you sir. well done

[@afsheenfaisal7618]

Thank you You helped my daughter in her science project

[@fadhilkarim7648]

its very clear and it useful

[@syedosama4265]

Thanks immensely, Sir! I got it wholly.

[@mazharhaseeb3375]

You are the world's most authentic and excellent teacher I ever seen....you cleared all the concepts...thanks sir

[@DoctorNajeeb]

It's my pleasure to have such great students like you. Keep supporting ❤️

[@raufurrahmanakanda]

Thank you very much sir ,Your lecture is totally outstanding!

[@ravinooli7159]

I have understood very well superb teaching

[@Naha_6304]

Sir i can't stop hearing your class Such a valuable class

[@Dr_angrybird]

You are the teacher of teaching ... excellent 🤗🤗

[@bartbengal]

I've been watching for 20 seconds and I already love this guy

[@DoctorNajeeb]

Dear bartbengal, Thank you for your love and support. :) May you be blessed with knowledge, prosperity, love and happiness, always. We wish you success and happiness in every walk of life and good luck in your future endeavors. Regards, Dr. Najeeb Team

[@Fatiii85]

I studied Optometry in the Netherlands and I work as an optometrist for 10 years.. But I never had a good explaining like the way you do it! God bless you Dr.

[@dr.tarunkarmakar6236]

Most beautiful explanation, I had ever seen

[@godwadairyexpo]

Sir u r really amazing I'm speechless . Hats off to your teaching skills thanks a lot sir . I wish I could meet you once in my life time and hope for a teacher like you or rather you only

[@drmathias9248]

It was really good explanation.now ı understand anatomy of the eye.thanks sir

[@ArvindYadav-cq4yq]

You are great sir Ji...! 😍

[@farihasoomro123]

Thankyou so much sir.. now i came to know each and everything of eyeball structure very clearly .. now i will continue taking my online classes of opthalmology.🥰🥰

[@sanskratidanceclub5132]

Oh my good what a teacher you are sir... It's really unbelievable I tried from 1 month to understand about eye ball...and I watch a lot of vedio and take help with a lot of teacher and senior but I can't and your one vedio clear my a lot of concept.....thank you so much sir....

[@bakhtawaridreestoor8911]

doctor Najeeb , It was very helpul. I loved it.

[@rohanyadav1200]

Helped me a lot sir ji

[@MuhammadQasim-of2kg]

Amazing explanation. Love the teacher. Awesome teaching skills

[@titusabraham4184]

He has a unique talent, genius if you will, for teaching and illustrating. I only wish I had such a teacher and the kind of internet access when I was in medical school.

[@DoctorNajeeb]

Thank you so much for your love :)

[@vinodkumarthirunagari7026]

Thank u so much sir it's really helped me a lot being a new joinee