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  • 00:08

    Right, Today we are going to continue the lectures on the structure of eye ball.

  • 00:14

    Already we have discussed cornea, sclera, right?

  • 00:20

    and we have also discussed the arterial supply to the eye ball.

  • 00:25

    Right?

  • 00:26

    Today we will specially talk about that uveal tract.

  • 00:30

    Right?

  • 00:31

    So.... let me very briefly review the basic structure of the eye ball and than we will

  • 00:37

    go into detail of the uveal tract.

  • 00:40

    As you know that basically eye ball has three main layers.

  • 00:46

    Right?

  • 00:47

    In which this is the outer most layer and this outer most layer is considered a protective

  • 00:56

    layer and this outer most layer of eye ball, its interior most area is transparent.

  • 01:04

    This is transparent and this is called cornea and this other part, this is white made of

  • 01:15

    collagen, its a tough membrane and this is called yes?

  • 01:20

    Sclera!

  • 01:21

    Very good!

  • 01:22

    Right?

  • 01:23

    So we can say the outer most layer or coat of the eye ball is protective part right?

  • 01:30

    Its posterior five sixth consists of sclera and interior you can say one sixth is basically

  • 01:40

    cornea which is transparent.

  • 01:41

    Right?

  • 01:42

    Am i clear?

  • 01:45

    Then!

  • 01:46

    Inside it, innter to this structure, inner to the sclera there is the main vascular layer

  • 01:53

    of the eye ball and this vasular layer of the eye ball, here I will make it just inside

  • 01:58

    the sclera, it extends on posterior surface, posterior area of the eye ball and it extends

  • 02:06

    interiorly.

  • 02:08

    Right?

  • 02:10

    Now this vascular layer of the eye ball.

  • 02:12

    Right?

  • 02:13

    or the middle layer of the walls of the eye ball, this thickens as it approaches interiorly,

  • 02:21

    it becomes thickened.

  • 02:24

    It becomes thick.

  • 02:27

    Right?

  • 02:28

    As it approaches interiorly and then this thickened part right?

  • 02:36

    Now this thickened part is called ciliary body and all vascular layer behind it is called

  • 02:44

    choroid and than there is a diaphram like structure but this is also vascular layer

  • 02:51

    and this interior most part is called.

  • 02:55

    This is a diaphram like structure with a central apperture, the apperture is called "Pupil"

  • 03:01

    and this part is called "Iris".

  • 03:03

    Is that right?

  • 03:04

    This is called "Iris".

  • 03:06

    Now, this is, yes! from here, from back upto here and here right all this structure is

  • 03:17

    yes?

  • 03:18

    Choroid.

  • 03:19

    This is called Choroid and this structure and this structure this is called cilliary

  • 03:25

    body and this part is called Iris.

  • 03:28

    Is that right?

  • 03:29

    This is called Iris.

  • 03:31

    Right? and all of this vascular layer is actually called "Uveal Tract".

  • 03:36

    So what is uveal; tract?

  • 03:39

    Uveal tract is basically middle coat of the eye ball wall and this is vascular coat, rather

  • 03:47

    I must say its vascular pigmented coat.

  • 03:50

    Its pigmented as well.

  • 03:52

    Right? and heavily vascular structure and this posterior five sixth of the eye ball,

  • 04:00

    this is basically choroid and than this yes enlarged part is called cilliary body this

  • 04:11

    diaphram like structure with a central apperture right?

  • 04:15

    This is called Iris.

  • 04:16

    Right? and inside it there is yes?

  • 04:21

    here the structure is yes please?

  • 04:27

    Retina.

  • 04:28

    Excellent!

  • 04:29

    This is called Retina.

  • 04:30

    Now!

  • 04:31

    As we will discuss later that retina has part in which this is having lots of rods and cones

  • 04:40

    right?

  • 04:42

    and a part of retina where rods and cones abruptly terminate at this point and this

  • 04:48

    point.

  • 04:49

    Rod and cones you can say abruptly terminate, the point of the retina where rod and cone

  • 04:57

    terminate this point is called "Ora Serrata".

  • 04:59

    What is it called?

  • 05:01

    Ora serrata! and a part of the retina, right?

  • 05:05

    It moves forward right?

  • 05:07

    the pigmented layer of the retina moves forward and it continues behind the Iris and cilliary

  • 05:16

    body and iris.

  • 05:18

    Now upto this point from here upto this point this is that part of the retina which is sensitive

  • 05:26

    to light and interior to this point right?

  • 05:30

    Part of the retina which extends forward it does not have rods and cones so it is called

  • 05:36

    that part of the retina which is not sensitive to the light and the point where these two

  • 05:41

    part of the retina meet with each other right?

  • 05:44

    the point where visual part of the retina or light sensitive part of the retina abruptly

  • 05:50

    terminates right?

  • 05:51

    That point is called Ora Serrata.

  • 05:54

    Am I clear uptill now? and than ofcourse you must be knowing that here is a structure called

  • 06:02

    yes?

  • 06:04

    Lens and behind the lens there is another structure here and this structure is called

  • 06:12

    Vitreous humor.

  • 06:14

    This is called Vitreous humor which is filling up the eye and lens is attached with special

  • 06:21

    ligament with the cilliary body and these ligaments of the lens which are holding the

  • 06:27

    lens or attaching the lens with the cilliary body these are called zonules or they are

  • 06:34

    called suspensory ligaments.

  • 06:37

    Is that right?

  • 06:38

    They are also called suspensory ligaments.

  • 06:41

    Any question about this?

  • 06:42

    No, so this is a very basic structure of the eye ball.

  • 06:48

    We have already studied the structure of the sclera, we have already lectures on the sclera,

  • 06:52

    we have also previously recorded lecture on cornea is that right?

  • 06:58

    and we have specifically had a very explanatory lecture on the blood supply to the eye ball.

  • 07:06

    Vessels which are supplying the eye ball.

  • 07:08

    I will briefly review that also because if blood supply to the eye ball is somewhat clear

  • 07:14

    than it will become very easy for you to understand the vascular supply within the uveal tract.

  • 07:21

    Again!

  • 07:22

    What is uveal tract?

  • 07:23

    Uveal tract is the vascular middle layer of the eye ball, is that right?

  • 07:31

    Uveal tract has posterior most part which is called choroid.

  • 07:35

    Than at ora serrata and forward uveal tract becomes thicker and that is called cilliary

  • 07:43

    body and than more interiorly uveal tract or this vascular layer becomes a diaphram

  • 07:52

    like structure with central apperture to allow the light to pass through that is pupil and

  • 07:57

    this diaphram like part, diaphram like curtain with a central apperture, this is called iris.

  • 08:04

    Is that right?

  • 08:05

    Any questions upto this?

  • 08:07

    Its clear?

  • 08:09

    Ok!

  • 08:10

    Now, very very briefly blood supply to the eye ball.

  • 08:13

    Right? and than we will continue our lecture on uveal tract.

  • 08:27

    Before I go for that you will tell me what is this structure now from here upto here?

  • 08:31

    Yes?

  • 08:32

    What is this structure?

  • 08:34

    Choroid.

  • 08:35

    What is this structure?

  • 08:38

    Cilliary body.

  • 08:39

    Excellent!

  • 08:40

    and what is this structure?

  • 08:41

    Iris, and all of this is uveal tract.

  • 08:45

    Am I clear?

  • 08:46

    and all of this is uveal tract?

  • 08:48

    Now the blood supply.

  • 08:50

    Right?

  • 08:51

    Very briefly.

  • 08:52

    Mainly the blood vessels which are coming to the eye ball, they are coming from opthalmic

  • 08:57

    artery.

  • 08:58

    Right?

  • 08:59

    From opthalmic artery number 1 artery goes here and this enters through the optic nerve

  • 09:06

    inside the eye ball and supplies the retina and this artery is called "Central Retina

  • 09:15

    Artery".

  • 09:16

    This is central retinal artery.

  • 09:20

    Right?

  • 09:21

    Then there are another group of vessels.

  • 09:23

    For example, I show it here that this will enter into eye ball outside the optic nerve

  • 09:32

    and this artery will yes here you see it is supplying which structure choroid.

  • 09:40

    What is this?

  • 09:42

    Blood vessel supplying choroid, and this blood vessel, right?

  • 09:46

    the first blood vessel was central retinal artery and number 2 blood vessel this and

  • 09:53

    this these are posterior cilliary arteries but they dont reach upto the interior part,

  • 10:02

    they dont reach upto the interior part of the uveal tract so we call them there are

  • 10:06

    posterior cilliary artery.

  • 10:09

    What are these?

  • 10:12

    Posterior cilliary artery and because they dont reach anterior most area they are considered

  • 10:18

    short, they are not long.

  • 10:20

    So what will be the name of this artery?

  • 10:26

    Short posterior cilliary artery.

  • 10:28

    Now the long posterior cilliary artery look at it, it comes from here it enters and it

  • 10:33

    moves forward forward forward and reaches upto here, its really long!

  • 10:38

    You see?

  • 10:40

    Posterior cilliary artery is mainly supplying choroid.

  • 10:45

    Posterior, short posterior cilliary, short posterior cilliary mainly supplying the choroid

  • 10:52

    and long posterior artery number 3 and you can put here also its the same so long posterior

  • 11:00

    cilliary moves forward and they are reaching upto here.

  • 11:04

    This is called what?

  • 11:07

    Long posterior cilliary.

  • 11:09

    Now listen!

  • 11:10

    This is posterior cilliary right?

  • 11:13

    This is also posterior cilliary but both of them are reaching not reaching to the cilliary

  • 11:19

    body and not reaching to iris so these are posterior short cilliary and these are entering

  • 11:26

    and reaching more interiorly so they are posterior long cilliary.

  • 11:33

    Is that right?

  • 11:34

    Am I clear?

  • 11:35

    Then!

  • 11:36

    here are the muscles, supplying the eye ball, attached with the eye ball and some opthalmic

  • 11:43

    artery branches go to the muscles and from the muscular sub branches enter what is this?

  • 11:50

    Enter into cilliary body, that is right.

  • 11:55

    This is muscular branch of opthalmic artery, from here a branch goes to the cilliary body

  • 12:01

    also, now this branch, this is also going to the eye ball, this is also going to the

  • 12:07

    eye ball, this is considered you can say number 4 and 4 this is considered anterior cilliary

  • 12:16

    artery.

  • 12:17

    This is considered anterior cilliary artery.

  • 12:20

    Any questions upto this?

  • 12:23

    Now you have to tell me.

  • 12:28

    What is this branch which through the optic nerve entering into eye ball and supplying

  • 12:32

    the inner most layer of retina.

  • 12:33

    What is this artery?

  • 12:35

    Yes?

  • 12:36

    Central retinal artery.

  • 12:39

    Now these are again branches which are entering from the back of the eye ball, so this is

  • 12:45

    posterior artery, sorry this one, the number 2, this is posterior artery, because its going

  • 12:50

    to eye ball, posterior cilliary artery but it is supplying mainly choroid and not supplying

  • 12:59

    the cilliary body and this is not supplying the iris, so this is short posterior cilliary,

  • 13:07

    short posterior cilliary, then this is an artery that also enters from the posterior

  • 13:10

    end of the eye ball.

  • 13:11

    Right?

  • 13:12

    It is posterior cilliary but it moves forward and it reaches upto cilliary body, right?

  • 13:20

    and its branches will supply the cilliary body and even to the iris.

  • 13:24

    So this is called posterior long cilliary artery.

  • 13:28

    You know the difference in short and long cilliary artery and than anterior cilliary.

  • 13:31

    Anterior cilliary artery is a branch of muscular branches of opthalmic artery and it enters

  • 13:38

    in the eye ball from anterior part, right?

  • 13:42

    Anterior to the middle, and anterior cilliary and once it enters in the cilliary body it

  • 13:49

    also makes anastomosis with the long posterior cilliary artery.

  • 13:56

    Am I clear?

  • 13:57

    This was a very brief review.

  • 13:59

    Now, we will go into detail of uveal tract, as you know already uveal tract consists of

  • 14:06

    three, what is uveal tract?

  • 14:07

    Its a vascular pigmented layer in the eye ball and its a middle layer because outer

  • 14:13

    layer is sclera, middle layer is uveal tract, out layer is cornea and sclera, middle layer

  • 14:19

    is uveal tract and inner most layer is retina.

  • 14:22

    Am I clear?

  • 14:23

    See our Video Library at www.DrNajeebLectures.com

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The example sentences of STRUCTURE in videos (15 in total of 2349)

lens proper noun, singular and coordinating conjunction behind preposition or subordinating conjunction the determiner lens noun, singular or mass there existential there is verb, 3rd person singular present another determiner structure noun, singular or mass here adverb and coordinating conjunction this determiner structure noun, singular or mass is verb, 3rd person singular present called verb, past participle
structure noun, singular or mass , here adverb you personal pronoun can modal see verb, base form this determiner cross noun, singular or mass like preposition or subordinating conjunction structure noun, singular or mass is verb, 3rd person singular present formed verb, past participle and coordinating conjunction this determiner cross noun, singular or mass like preposition or subordinating conjunction structure noun, singular or mass
you personal pronoun can modal see verb, base form this determiner wavy noun, singular or mass structure noun, singular or mass and coordinating conjunction then adverb this determiner loop noun, singular or mass and coordinating conjunction then adverb more adjective, comparative wavy noun, singular or mass structure noun, singular or mass .
atomic adjective structure noun, singular or mass , you personal pronoun have verb, non-3rd person singular present subatomic adjective structure noun, singular or mass , and coordinating conjunction below preposition or subordinating conjunction all determiner of preposition or subordinating conjunction that determiner you personal pronoun have verb, non-3rd person singular present quantum noun, singular or mass proper noun, singular light noun, singular or mass .
to to make verb, base form the determiner examples noun, plural executable adjective bdd proper noun, singular requires verb, 3rd person singular present a determiner little adjective bit noun, singular or mass of preposition or subordinating conjunction structure noun, singular or mass and coordinating conjunction this determiner structure noun, singular or mass
buy verb, base form the determiner structure noun, singular or mass or coordinating conjunction build verb, base form the determiner structure noun, singular or mass but coordinating conjunction actually adverb the determiner upkeep noun, singular or mass every determiner single adjective month noun, singular or mass every determiner
now adverb start verb, base form with preposition or subordinating conjunction drawing verb, gerund or present participle the determiner simplest adjective, superlative structure noun, singular or mass , in preposition or subordinating conjunction our possessive pronoun case verb, base form it personal pronoun s proper noun, singular the determiner typical adjective skeletal adjective structure noun, singular or mass .
this determiner gives verb, 3rd person singular present us personal pronoun the determiner zigzag noun, singular or mass structure noun, singular or mass that preposition or subordinating conjunction you're proper noun, singular going verb, gerund or present participle to to see verb, base form when wh-adverb drawing verb, gerund or present participle skeletal adjective structure noun, singular or mass .
i personal pronoun mean verb, non-3rd person singular present , the determiner structure noun, singular or mass of preposition or subordinating conjunction them personal pronoun was verb, past tense like preposition or subordinating conjunction there existential there was verb, past tense huge adjective holes noun, plural in preposition or subordinating conjunction the determiner structure noun, singular or mass .
dna proper noun, singular has verb, 3rd person singular present a determiner beautiful adjective structure noun, singular or mass and coordinating conjunction that determiner structure noun, singular or mass will modal help verb, base form you personal pronoun understand verb, non-3rd person singular present how wh-adverb inheritance noun, singular or mass works noun, plural .
now adverb how wh-adverb do verb, non-3rd person singular present we personal pronoun go verb, non-3rd person singular present from preposition or subordinating conjunction the determiner middle noun, singular or mass structure noun, singular or mass to to this determiner structure noun, singular or mass on preposition or subordinating conjunction the determiner right noun, singular or mass ?
where wh-adverb you personal pronoun identify verb, non-3rd person singular present what wh-pronoun your possessive pronoun structure noun, singular or mass is verb, 3rd person singular present or coordinating conjunction what wh-pronoun the determiner structure noun, singular or mass of preposition or subordinating conjunction the determiner graph noun, singular or mass is verb, 3rd person singular present ,
the determiner build noun, singular or mass the determiner company noun, singular or mass the determiner structure noun, singular or mass the determiner structure verb, base form you personal pronoun know verb, non-3rd person singular present i personal pronoun did verb, past tense the determiner research noun, singular or mass on preposition or subordinating conjunction
is verb, 3rd person singular present that preposition or subordinating conjunction the determiner structure noun, singular or mass of preposition or subordinating conjunction textiles noun, plural is verb, 3rd person singular present the determiner same adjective as preposition or subordinating conjunction the determiner structure noun, singular or mass of preposition or subordinating conjunction touch noun, singular or mass screens noun, plural
structure noun, singular or mass and coordinating conjunction i personal pronoun can modal start verb, base form to to balance verb, base form everything noun, singular or mass around preposition or subordinating conjunction that determiner structure noun, singular or mass going verb, gerund or present participle to to university noun, singular or mass would modal

Use "structure" in a sentence | "structure" example sentences

How to use "structure" in a sentence?

  • In the play we have the messy he-loves-her, she-loves-him, she-loves-him-too structure, and, to add even more confusion to the mix, the real love story is between the two ladies.
    -Norbert Leo Butz-
  • I love music because it's so fecking brilliant. Music is math, and math is the structure of everything and pretty much perfect.
    -Karen Marie Moning-
  • The novel should be understood as a structure built to accommodate the greatest possible amount of cool stuff.
    -Steven Brust-
  • They laughed. Things were funny. They weren't afraid to care. There was no sense to life, to the structure of things.
    -Charles Bukowski-
  • The body enjoys a great share in our being, and has an eminent place in it. Its structure and composition, therefore, are worthy of proper consideration.
    -Michel de Montaigne-
  • Structure your cross-training appropriately by alternating the intensity of your sessions so you work, recover, work, recover.
    -Brett Hoebel-
  • Whenever and wherever one encounters the arising and passing away of the mental-physical structure, one enjoys bliss and delight, which lead on to the deathless stage experienced by the wise
    -Gautama Buddha-
  • But the best teams I've encountered have one important thing in common: their team structure and processes cover a full range of distinct competencies necessary for success.
    -Jesse James Garrett-

Definition and meaning of STRUCTURE

What does "structure mean?"

/ˈstrək(t)SHər/

noun
The way in which the parts of a system or object are arranged or organized, or a system arranged in this way.
verb
To plan, organize, or arrange the parts of something.

What are synonyms of "structure"?
Some common synonyms of "structure" are:
  • construction,
  • form,
  • formation,
  • shape,
  • composition,
  • fabric,
  • anatomy,
  • makeup,
  • constitution,
  • organization,
  • system,
  • arrangement,
  • layout,
  • design,
  • frame,

You can find detailed definitions of them on this page.