Lens nucleus lens capsule crystalline. Medical search. Frequent questions

The core of the crystalline lens, surrounded by the cortex. (lookformedical.com)
Following capsulorhexis, fluid irrigation or hydrodissection is performed gently to separate the lens capsule's cortex. (scopeheal.com)
Once the posterior lens cortex and capsule have been hydrodissected, the surgeon can rotate the nucleus within the capsular bag to facilitate removal by phacoemulsification. (scopeheal.com)
In the Cavalier King Charles Spaniel, onset is at an early age (less than 6 months), affecting the cortex and nucleus with rapid progression to complete cataract, resulting in blindness. (ackcsc.org)
These white intumescent cataracts pose a challenge during capsulorrhexis creation because the intra-lenticular pressure increases as the lens cortex liquefies. (cataractcoach.com)
The bluish hue in a white cataract is due to liquified lens cortex, which makes this an intumescent white cataract . (cataractcoach.com)
Definisi Katarak adalah adanya kekeruhan pada lensa, bisa terjadi pada cortex, nucleus, atau kapsul posterior. (scribd.com)

The making of a continuous circular tear in the anterior capsule during cataract surgery in order to allow expression or phacoemulsification of the nucleus of the lens. (lookformedical.com)
However, chronic postoperative uveitis following phacoemulsification with retained lens material is still a well-known complication of cataract surgery and is the result of the same pathophysiology as the classically described entity of phacoanaphylaxis. (medscape.com)
While lens fragments may be retained in the anterior or posterior chamber during seemingly uncomplicated cataract surgery, they also may be dislocated posteriorly into the vitreous cavity during phacoemulsification of the nucleus, usually after zonular dehiscence or posterior capsule rupture. (medscape.com)
Mrs. Khan opted for a multifocal lens (a lens which allow clear vision for near as well as far without glasses).In Phacoemulsification, a micro incision is made on the side of the cornea. (rnreyecare.com)

The space in the eye, filled with aqueous humor, bounded anteriorly by the cornea and a small portion of the sclera and posteriorly by a small portion of the ciliary body, the iris, and that part of the crystalline lens which presents through the pupil. (lookformedical.com)
A titanium needle called a phaco probe is inserted into the cornea and directed to the central nucleus of the cataract, where it is densest. (scopeheal.com)
Astigmatism is caused by distortion of the crystalline lens and cornea, which is the lens of the eye. (miyoshi-eye-clinic.com)
Reshaping of the cornea with corneal incisions to reduce astigmatism, and the removal of the front surface (anterior lens capsule) of the crystalline lens that contains the cataract. (premiermedicalgrp.com)
Microphthalmia is a congenital defect characterized by a small eye often associated with other ocular malformations, including defects of the cornea, anterior chamber, lens and/or retina. (ackcsc.org)
The sclera 131 is the white tissue that surrounds the lens 103 except at the cornea 101 . (justia.com)
Generally, sight occurs when light enters the eye through the cornea 101 and pupil, then proceeds through the ocular lens 103 through the vitreous 110 along the visual axis 104 , strikes the retina 105 at the back of the eye, forming an image at the macula 106 that is transferred by the optic nerve 107 to the brain. (justia.com)
The space between the cornea 101 and the retina 105 is filled with a liquid called the aqueous 117 in the anterior chamber 109 and the vitreous 110 , a gel-like clear substance, in the chamber posterior to the lens. (justia.com)
The system uses sophisticated algorithms to process volumetric OCT image data, map the surfaces of the cornea and lens, and create safety zones, which I can then move or customize if necessary. (crstoday.com)

Cataracts are a disease in which the crystalline lens becomes clouded. (miyoshi-eye-clinic.com)
Cataracts are simply a clouding of the otherwise normal crystalline lens caused typically by the aging process, although sometimes injuries or drugs can contribute to this disorder. (premiermedicalgrp.com)
Cataracts cause the clear lens to become cloudy or opaque inhibiting the passage of light to the back of the eye and causing a significant reduction in vision oftentimes leading to the complaint of frosted or fogged vision by the patient. (premiermedicalgrp.com)
Cataracts may involve the lens completely (diffuse) or in a localized region. (ackcsc.org)
The conversion process from soluble crystallins to insoluble proteins during aging of the lens also may result in an increased antigenic effect of proteins from mature or hypermature cataracts . (medscape.com)
Well-developed cataracts appear as gray, white, or yellow-brown opacities in the lens. (msdmanuals.com)
Dense white cataracts tend to be in older patients and on slit lamp examination there is a yellow to brown hue to the central portion of the crystalline lens. (cataractcoach.com)
The only proven treatment for cataracts is lens replacement surgery. (healthnews.com)

A procedure for removal of the crystalline lens in cataract surgery in which an anterior capsulectomy is performed by means of a needle inserted through a small incision at the temporal limbus, allowing the lens contents to fall through the dilated pupil into the anterior chamber where they are broken up by the use of ultrasound and aspirated out of the eye through the incision. (lookformedical.com)
An intraocular lens is an artificial lens that is implanted in the eye instead of the lens extracted by cataract surgery. (miyoshi-eye-clinic.com)
The intraocular lens affects the most visible operation (quality of appearance, quality of life) of various surgical items and devices related to cataract surgery. (miyoshi-eye-clinic.com)
Multifocal intraocular lenses are expensive due to their own burden, but patients who wish to reduce the frequency of use of eyeglasses after cataract surgery become more and more year by year, and more people who choose multifocal intraocular lens are increasing. (miyoshi-eye-clinic.com)
If you would like a multifocal intraocular lens during cataract surgery, if you are interested, please do not hesitate to contact your doctor or staff. (miyoshi-eye-clinic.com)
The Toric intraocular lens, instead of the lens cloudy in cataract surgery, intraocular lens to be implanted one of the, correct astigmatism you can. (miyoshi-eye-clinic.com)
Lens-induced uveitis may develop, and the degree of intraocular inflammation in these patients often is governed by the size of the retained lens fragment, the time since cataract surgery, the patient's individual inflammatory response, and the extent of other intraocular manipulations. (medscape.com)
A significant advantage of the femtosecond laser-and one that was possibly not anticipated in the early days of laser cataract surgery-is that the incorporated OCT imaging gives the surgeon much more information about the anatomy of the eye, the anterior chamber, and the lens thickness. (crstoday.com)

In my opinion, the greatest benefits of the procedure are seen in the new information provided by the laser's imaging capabilities, lens fragmentation, and the creation of uniform, precise capsulotomies. (crstoday.com)

The anterior capsule tends to look relatively flat with no evidence of fluid within the capsular bag. (cataractcoach.com)
In a routine cataract, the lens material is solid and the pressure within the capsular bag is lower than the pressure in the anterior chamber, making capsulorrhexis creation straightforward. (cataractcoach.com)
Is there fluid from decomposed lens proteins within the capsular bag? (cataractcoach.com)

Partial or complete opacity on or in the lens or capsule of one or both eyes, impairing vision or causing blindness. (lookformedical.com)

Upon detailed eye examination, which began with Visual Acuity, it showed that vision loss was because of cloudy lens i.e. she had developed moderate cataract (Anterior capsular cataract along with Nuclear Sclerosis Grade II) mainly due to her age. (rnreyecare.com)

Lens luxation (or dislocation) can be associated with various processes that can weaken or damage the zonular-capsular complex. (aao.org)
There are various theories on how ciliary muscle contraction alters zonular tension to increase the optical power of the lens during accommodation. (medscape.com)
The Helmholtz theory of accommodation is based on the concept that the crystalline lens changes in shape with relaxation of zonular fibers. (medscape.com)
Helmholtz believed that contraction of the ciliary muscle causes relaxation of the zonular fibers, with a subsequent curvature increase of other anterior and posterior lens surfaces. (medscape.com)

Documentation by previous eye providers had labeled Mr. Grover as aphakic in the right eye, suggesting that the lens dislocation happened years ago or around the time of the accident, with the nucleus initially falling into and resting in the vitreous cavity. (aao.org)
The transparent, semigelatinous substance that fills the cavity behind the CRYSTALLINE LENS of the EYE and in front of the RETINA. (lookformedical.com)

High vacuum and a low power (epinuclear) setting were then used to remove the lens without ultrasound. (crstodayeurope.com)
With the support of ultrasound, the crystalline lens is fragmented (emulsified) and aspirated for cleaning the area. (scopeheal.com)
In addition, the FemtoSecond Laser actually softens the nucleus (the inside portion) of the cataractous lens allowing the cataract to be suctioned and removed from the eye more efficiently with less ultrasound energy for the patient. (premiermedicalgrp.com)

The exam was most notable for something we saw in the right eye-a large dense hexagonal brown mass in the anterior chamber consistent with a dislocated crystalline lens nucleus ( Fig. 1 ). (aao.org)
With this finding, we diagnosed lens luxation into the anterior chamber. (aao.org)
Later, after the lens had been reposited into the posterior chamber, (2A) slit lamp showed the anterior chamber without the mass, and (2B) indirect biomicroscopy ophthalmoscopy with a 20-D lens showed the crystalline lens behind the iris. (aao.org)
The goal of hydrodissection was therefore to prolapse the lens into the anterior chamber. (crstodayeurope.com)
A chop setting can be used with high vacuum to lift the lens into the anterior chamber. (crstodayeurope.com)
Knowing how big the crystalline lens is in relation to the anterior chamber helps me prepare for surgery and may eventually allow me to more accurately predict the effective lens position (ELP). (crstoday.com)

A transparent, biconvex structure of the EYE, enclosed in a capsule and situated behind the IRIS and in front of the vitreous humor (VITREOUS BODY). (lookformedical.com)
It will also be challenging to place the intraocular lens (IOL) in the posterior chamber with both haptics under the iris. (cehjournal.org)
The ocular or natural crystalline lens 103 , a more detailed picture of which is shown in FIG. 8 A , (utilizing similar reference numbers for similar structures) is located just posterior to the iris 102 . (justia.com)
Light is further converged by the crystalline lens located posterior to the iris. (medscape.com)

An ultrasonic probe is used to fragment the opacified crystalline lens, and the resulting material is extracted through a minimal incision using a suction system always under the control of the surgeon. (scopeheal.com)
However, due to the density of the nucleus a larger degree of ultrasonic phaco energy will likely be required and the risk of corneal endothelial trauma or even phaco wound burn is higher. (cataractcoach.com)
A device emits ultrasonic energy on the cloudy lens that breaks the lens into small pieces, which are then removed by suction. (rnreyecare.com)

Insertion of an artificial lens to replace the natural CRYSTALLINE LENS after CATARACT EXTRACTION or to supplement the natural lens which is left in place. (lookformedical.com)
After this, the cataract surgeon inserts a new artificial lens called as intraocular lens (IOL) and the procedure is called intraocular lens implantation.Mrs. Khan showed tremendous improvement in her vision post-surgery. (rnreyecare.com)

The lens is a transparent biconvex spheroid suspended at its equator by zonulas, which are connected to the ciliary body. (medscape.com)

Whether operating on a dense white cataract or a nucleus with moderate sclerosis, I prefer a manual technique that is gentle on the zonules. (crstodayeurope.com)

I use the technique in all of my cataract cases-from trainee cases to surgery on eyes with traumatic, dense white lenses. (crstodayeurope.com)
I find that the primary groove technique works well for dense nuclei that require disassembly. (crstodayeurope.com)
Is the nucleus dense or relatively soft? (cataractcoach.com)

Cataract, an opacification of the natural crystalline lens, is a significant cause of reversible blindness worldwide. (springer.com)

A heterogeneous family of water-soluble structural proteins found in cells of the vertebrate lens. (lookformedical.com)
The presence of these proteins accounts for the transparency of the lens. (lookformedical.com)
Alpha-crystallins also act as molecular chaperones that bind to denatured proteins, keep them in solution and thereby maintain the translucency of the lens. (lookformedical.com)
Lens proteins are most likely immunologically privileged, and they may initiate an immunologic sensitization only after entering the aqueous humor. (medscape.com)
This privilege is probably because of numerous factors, as follows: lens proteins are isolated from the fetal circulation early in embryonic life, the lens is devoid of innervation, and the adult lens is completely avascular. (medscape.com)
[ 16 , 20 ] Halbert et al found that lens proteins might be autoantigenic when they escape from their position of immunological isolation in the lens capsule. (medscape.com)
Autologous lens proteins are only weakly antigenic, but fractionated crystallins are much more effective in stimulating an antibody response. (medscape.com)

The natural crystalline lens of the human eye that has become opaque or cloudy is replaced with an artificial intraocular lens. (healthnews.com)
he evaluated her eyes and explained that the hazy vision in her eyes was because of the cloudy lens. (rnreyecare.com)

The thin noncellular outer covering of the CRYSTALLINE LENS composed mainly of COLLAGEN TYPE IV and GLYCOSAMINOGLYCANS. (lookformedical.com)
a large oval nucleus and is devoid of pigment, while the inner portion is filled with pigment and extends as a series of thread-like processes amongst the outer segments of the rods and cones. (co.ma)

A class of crystallins that provides refractive power and translucency to the lens (LENS, CRYSTALLINE) in VERTEBRATES. (lookformedical.com)
The present invention relates to systems and methods for treating the structure of the natural human crystalline lens with a laser to address a variety of medical conditions, such as presbyopia and refractive error. (justia.com)

Your surgeon will then use an instrument called a "chopper" or "cracker" that will break up the hard cataract nucleus into finer pieces. (healthnews.com)

Clouding at the back of the lens is called a subscapular cataract, while cloudiness at the core of the lens is called a nuclear cataract. (scopeheal.com)

Phacoanaphylaxis/lens-induced uveitis occurs in the setting of a ruptured or degenerative lens capsule and is characterized by a granulomatous antigenic reaction to lens protein. (medscape.com)
A cataract is a congenital or degenerative opacity of the lens. (msdmanuals.com)

After creation of the capsulorhexis, two capsule retractors (MicroSurgical Technology) were placed to support and center the crystalline lens. (crstodayeurope.com)
Continuous curvilinear capsulorhexis is the most widely used due to its numerous advantages that facilitate stabilization and centering of the intraocular lens. (scopeheal.com)

An ocular cataract is the clouding of the natural lens of the eye, which causes considerable loss of vision, especially in people over 40 years of age. (scopeheal.com)
The terms ocular lens, natural crystalline lens, natural lens, natural human crystalline lens, and lens (when referring to the prior terms) are used interchangeably herein and refer to the same anatomical structure of the human eye. (justia.com)
In almost all surgeries, an artificial intraocular lens (IOL) replaces the natural lens. (healthnews.com)
The result is the natural lens tissue is emulsified. (healthnews.com)
It involves the removal of almost the entire natural lens in a single piece, leaving the elastic posterior capsule intact. (healthnews.com)
The natural lens is manually removed. (healthnews.com)

Cataract formation can also result after lens touch with intraocular instruments, in response to the introduction of intraocular tamponading agents such as silicone oil and gas, and if crystallization on the anterior hyaloid or posterior capsule results in posterior capsular lens feathering and inflammation. (crstodayeurope.com)

In these dogs, lesions are circular or semicircular central crystalline deposits in the anterior corneal stroma that appear between 2 and 5 years of age. (ackcsc.org)

The nu-cleus appeared to be tethered by a clear membrane consistent with a torn lens capsule that extended from behind the pupil. (aao.org)

Absence of the crystalline lens resulting from cataract extraction. (lookformedical.com)
We analyzed mice expressing human p53 transgene (Tg p53 ) selectively in the lens in the presence or absence of Mdm2 . (molvis.org)

On the other hand, a cortical cataract begins at the periphery of the lens and spreads toward the center. (scopeheal.com)

its equator, while its posterior two-thirds are enveloped by a loose membrane termed the fascia bulbi (O.T. capsule of Tenon). (co.ma)

PSC occurs at the back of the capsule. (rnreyecare.com)
Herniated nucleus pulposus (intervertebral disk) most commonly occurs in the lumbar and lumbosacral regions. (rnpedia.com)

Methyltestosterone is a white to light yellow crystalline substance that is virtually insoluble in water but soluble in organic solvents. (theodora.com)

[ 21 ] Each of the crystallin protein groups of lens cortical fibers contains a number of subtypes with distinct antigenic characteristics. (medscape.com)

A partial or complete opacity of the lens and/or its capsule. (ackcsc.org)

The system then directs me through a capture-and-lock process to integrate the suction ring to the disposable lens. (crstoday.com)
Suction is then employed to aspirate the cortical material or the soft parts of the lens surrounding the nucleus. (healthnews.com)

When this muscle contracts as an autonomic nervous system response, tension on the zonules is altered, resulting in a change in the shape of the lens. (medscape.com)
A neural feedback mechanism from the brain allows the ciliary muscle 108 , acting through the attachment of the zonules 111 , to change the shape of the ocular lens. (justia.com)

We pondered what would cause anterior lens dislocation this late after trauma. (aao.org)

The intraocular lens has a single focus intraocular lens and a multifocal intraocular lens. (miyoshi-eye-clinic.com)
Since the single focus intraocular lens has only one focus, it requires eyeglasses frequently after surgery, but the multifocal intraocular lens has more focal points compared to the single focus intraocular lens. (miyoshi-eye-clinic.com)
There are various kinds even if it is called multifocal intraocular lens In a word. (miyoshi-eye-clinic.com)
Currently, the advanced multifocal intraocular lenses Minifell Lady ® (SIFI) and Technics Symphony ® Opti Blue (AMO) are called Extended depth of focus intraocular lens (EDOF) and have depth of focus. (miyoshi-eye-clinic.com)
Conventional multifocal intraocular lens suffered from problems such as reduction in contrast sensitivity and secondary symptoms such as halo, glare, ghost, etc., in order to obtain high visibility capability. (miyoshi-eye-clinic.com)
EDOF intraocular lens is a lens that can be used more reliably than many traditional multifocal intraocular lenses, with fewer secondary symptoms, although the near vision will be slightly reduced. (miyoshi-eye-clinic.com)
Because multifocal intraocular lenses are highly functional, precise surgery and examination are required, and depending on the patient's eyes, personality and life, it may be worse than monofocal intraocular lenses. (miyoshi-eye-clinic.com)

trypan blue dye used to stain the capsule, but look within the capsular opening and note the blue hue (not from dye). (cataractcoach.com)

The only treatment is a surgery to replace the opaque lens with a clear artificial intraocular lens (IOL). (springer.com)

Since the ciliary body had not yet been discovered, he postulated that the change in shape of the crystalline lens is induced by a muscular mechanism within the crystalline lens. (medscape.com)
Generally, the ocular lens changes shape through the action of the ciliary muscle 108 to allow for focusing of a visual image. (justia.com)

On examination, PXF material was evident on the lens capsule (Figure 1). (crstodayeurope.com)
A slit lamp examination will identify most problems you are liable to face during surgery, such as subluxated lenses. (cehjournal.org)

EDOF intraocular lenses have lower contrast sensitivity (quality of appearance), halo, glare (glare), while acquiring a far wider clear vision range (range of focus) compared to single focus intraocular lenses, ghost (you can see something like a shadow), and so on. (miyoshi-eye-clinic.com)

It is a cataract-removal surgery that involves removing the front portion of the lens from the eye while retaining the posterior capsule. (scopeheal.com)

While seldomly used nowadays, there are still indications for which 20-gauge is necessary including removal of retained lens material using the fragmatome and removal of intraocular foreign bodies (IOFB) using IOFB forceps. (eyewiki.org)

If a rigid IOL is implanted thereafter, enlargement of the incision and suturing the lens to the bag may be required. (crstodayeurope.com)
Sometimes a rigid polymethyl methacrylate or PMMA lens is used which is rigid and requires a larger incision. (healthnews.com)

Will shifting the lens let us see more clearly when prognosticating after cardiac arrest, or do we need new glasses? (harvard.edu)

In 1823, Purkinje noted the reflected images of a candle from the anterior and posterior crystalline lens surfaces. (medscape.com)

Presence of an intraocular lens after cataract extraction. (lookformedical.com)
Predictors of long-term intraocular pressure control after lens extraction in primary angle closure glaucoma: results from the EAGLE trial. (harvard.edu)

Slit-lamp photograph of PXF material on the anterior lens capsule. (crstodayeurope.com)
The final step of the surgery is to use a dual irrigation-aspiration (I-A) probe or a bimanual I-A system to remove any remaining lens or peripheral material. (healthnews.com)
1,4-DCB, the most commercially important dichlorobenzene isomer, is a volatile colorless to white crystalline material with a mothball-like, penetrating odor. (cdc.gov)

For example, in a short eye with a shallow chamber, if the crystalline lens is of normal thickness, I would expect the IOL that replaces it to sit slightly forward and therefore have more power. (crstoday.com)

The purpose of this study was to determine if Mdm2 regulates p53 in vivo in the adult lens. (molvis.org)
Mdm2 regulates p53 in the adult lens in vivo. (molvis.org)

Anatomy21

Organisms2

Diseases7

Chemicals and Drugs8

Analytical, Diagnostic and Therapeutic Techniques and Equipment16

Phenomena and Processes4

Cortex7

Phacoemulsification4

Cornea9

Cataracts8

Cataract surgery8

Fragmentation1

Capsular bag3

Causing blindness1

Visual Acuity1

Zonular4

Cavity2

Ultrasound3

Anterior chamber6

Iris4

Ultrasonic3

Artificial lens2

Biconvex1

White cataract1

Dense3

Blindness worldwide1

Proteins7

Cloudy2

Outer2

Refractive2

Surgeon1

Nuclear1

Degenerative2

Capsulorhexis2

Natural lens6

Hyaloid1

Corneal1

Pupil1

Absence2

Cortical cataract1

Membrane1

Occurs2

Insoluble1

Crystallin1

Opacity of the lens1

Suction2

Zonules2

Dislocation1

Multifocal7

Stain1

Opaque1

Ciliary2

Examination2

Contrast1

Portion of the lens1

Retained lens material1

Incision2

Cardiac1

Surfaces1

Extraction2

Material3

Chamber1

Adult lens2