Where results make sense

About us   |   Why use us?   |   Reviews   |   PR   |   Contact us

eMedicine - Postoperative Flat Anterior Chamber : Article by James V Aquavella, MD The anterior chamber is deepest (approximately 3 mm) in its central portion and shallowest at the peripheral insertion of the iris. The depth of the anterior chamber is estimated as the distance between the posterior surface of the cornea and the front surface of the iris. The depth of the anterior chamber is an important indicator of the integrity of the postoperative globe and may be useful in the differential diagnosis of existent pathology. www.emedicine.com /oph/topic531.htm   (2687 words)

Inflatable vaginal pessary - Patent 5611768 Thus the anterior chamber of a pessary of the invention can extend into the fornix region or the anchor member (posterior chamber) can extend into the vestibule region, as long as the other essential features of the invention are present in the device. If multiple chambers are used in either the fornix or the vestibule, the aggregate lengths, cross sectional dimensions and volumes of those chambers should approximate the lengths, cross sectional dimensions and volumes disclosed for posterior and anterior chambers, respectively, of the two-chambered pessary. The "tube" thus represents whatever shape is present to connect the chamber to the valve and may merely be the end of the chamber itself (e.g., for the anterior chamber that is adjacent to the external opening of the vagina) or an extension thereof. www.freepatentsonline.com /5611768.html   (5782 words)

Review of Ophthalmology In the anterior chamber, if you have a prolene suture through the iris, I think you have to admit that it would be subject to more light degradation than a suture that is buried under a scleral flap. If I felt that an anterior chamber lens was the most appropriate for the patient at the time of surgery, and I didn't wish to extend the 3-mm temporal clear corneal incision, I would move superiorly, open the conjunctiva and make a sclero-corneal tunnel for lens implantation at the same sitting. Studies indicate that a well-positioned anterior chamber lens is tolerated by the graft. www.revophth.com /index.asp?page=1_2.htm   (3685 words)

Assessment of the anterior chamber Much of the anterior chamber is readily visible with the slit lamp biomicroscope. Assuming the corneal thickness = 1 unit, assess the width of the "aqueous gap" from corneal endothelium to iris. An eye with an anterior chamber depth of less than 2.5 mm is at risk for angle closure. www.academy.org.uk /tutorials/gonio.htm   (505 words)

Ophthalmic Hyperguide. Section: Pediatric Ophthalmology When hyphemas are divided into four groups according to the amount of filling of the anterior chamber, hyphemas involving less than one-third of the anterior chamber comprise 58%, one-third to one-half of the anterior chamber, 20%; one-half to less than total, 14%; and total hyphemas, 8% (Slide 3). The source of anterior chamber hemorrhage in contusion injuries is believed to be related to the displacement of tissues posteriorly or to the resultant fluid wave in the aqueous and vitreous, which stretches the limbal vessels and displaces the iris and lens. To avoid the iris and lens, the blade is oriented and pushed into the anterior chamber in such a manner that it is parallel to the plane of the iris. www.ophthalmic.hyperguides.com /Tutorials/pediatric/Crouch/tutorial.asp   (7571 words)

JCRS: Vol. 26, No. 1, January 2000 According to the surgeon, ECCE was attempted because of an extraordinarily dense nuclear cataract and a shallow anterior chamber; he sensed that phacoemulsification was too risky with respect to the cornea. Through a beveled paracentesis, the anterior chamber is deepened with a dispersive viscoelastic material and posterior synechias are gently lysed with a cyclodialysis spatula. The anterior chamber is then reformed with an intraocular miotic, and the pupil is mechanically reduced using a Lester hook. www.ascrs.org /publications/jcrs/csjan00.htm   (6316 words)

Surgical contamination of the anterior chamber during lens surgery Anterior chamber aspirates collected at the conclusion of surgery were culture positive for at least one organism in 22.7% of eyes. Two fungi and one bacterium isolated from the anterior chamber were typed identically, and the bacterium had a similar antibiogram to organisms recovered from the patient`s conjunctiva and eyelid margin. We conclude that intraoperative contamination of the anterior chamber with viable bacterial and fungal organisms is a common occurrence in canine patients undergoing cataract phacoemulsification and intraocular lens implantation, and the external ocular flora is a likely source of some of these contaminating microorganisms. www.vetcontact.com /en/art.php?a=541&t=   (547 words)

Glaucoma Service Foundation: Examining, Grading and Treating the Anterior Chamber Angle Chat Highlights The anterior chamber of the eye is the part of the eye in front of the iris. A flat anterior chamber occurs when all the fluid in the anterior chamber is gone, and the iris and lens are pushed up against the cornea. The anterior surface of the iris is plastered to the inside of the trabecular meshwork and scarred there. www.wills-glaucoma.org /supportgroup/20021204.php   (1624 words)

JCRS Consultation Section: January/February 1997 The anterior chamber is then re-formed with BSS through the side port before removal of the I/A handpiece, and the incisions are immediately hydrated and sealed. Filling the anterior chamber with viscoelastic to trap the small fragment, using a bimanual technique in which a manipulator holds the fragment against the phaco probe, and securing the nucleus with high vacuum prior to pulsed phaco will ensure that the nuclear fragment is well controlled. Then, air is injected into the anterior chamber to ensure that there is no vitreous in the anterior chamber and the lens is in the proper position. www.ascrs.org /publications/jcrs/ccsjan7.html   (4669 words)

Vision In Focus   (Site not responding. Last check: 2007-10-25) Anterior chamber — The space in the eye that is behind the cornea and in front of the iris. Astigmatism — A common form of visual impairment in which part of an image is blurred, due to an irregularity in the curvature of the front surface of the eye, the cornea. Posterior chamber — The fluid-filled space between the back of the iris and resting against the capsular bag. www.visioninfocus.com /030.asp   (850 words)

ACAID Induced by Allogeneic Corneal Tissue Promotes Subsequent Survival of Orthotopic Corneal Grafts -- Sonoda et al. ... that allogeneic corneal fragments in the anterior chamber are Capacity of allogeneic cornea fragments in the anterior chamber to induce delayed hypersensitivity. Capacity of allogeneic cornea fragments in the anterior chamber to induce ACAID. www.iovs.org /cgi/content/full/41/3/790   (4239 words)

Cataract & Refractive Surgery Today Identifying a shallow anterior chamber preoperatively allows you to take the appropriate steps during the procedure to avoid complications. Both methods usually soften the eye and, after the injection of viscoelastic devices into the anterior chamber, facilitate the surgical manipulation of the anterior segment. Be cautious regarding the posterior capsule and raise the bottle height to increase the anterior chamber depth. www.crstodayarchive.com /03_archive/0603/061.html   (1040 words)

Anterior chamber definition - Medical Dictionary definitions of popular medical terms Anterior chamber: The space in the eye that is behind the cornea and in front of the iris. The cornea is the outer, transparent, dome-like structure that covers the iris, pupil, and the anterior chamber. The anterior chamber is filled with a watery fluid known as the aqueous humor, or aqueous. www.medterms.com /script/main/art.asp?articlekey=10586   (208 words)

Combined perfluoropropane gas and viscoelastic material injection for anterior chamber reformation following ... a shallow anterior chamber, hypotony, and overfiltrating blebs. The IOP was 1–2 mm Hg, the anterior anterior chamber was deep and quiet and the lens was clear. bjo.bmjjournals.com /cgi/content/full/86/11/1225   (2081 words)

doctor-hill.com: IOLMaster IOL Master Anterior Chamber Depth ACD Mode Zeiss IOLMaster Anterior chamber depth on the IOLMaster is interpreted as the distance between the anterior vertex of the cornea and the anterior vertex of the eye lens. Calculation of the anterior chamber depth requires the input of the corneal radius. The anterior chamber depth measurement may be repeated as often as desired. www.doctor-hill.com /iol-master/acd.htm   (632 words)

Anterior Chamber, Iris, Vitreous The iris regulates the amount of light coming into the eye by decreasing the pupil size in bright light and increasing the pupil size in darkness. Iritis, or anterior uveitis, is an inflammation of the iris. This is an inflammation of the middle layer of the eye which may be due to infections, auto-immune disorder and rarely, tumors. www.coopereyecare.com /iris,_ant_chamb,_vit.htm   (619 words)

Anterior and posterior chamber phakic IOLs have different advantages... MILAN, Italy — Anterior chamber phakic IOL models may offer more predictable refractive results, but posterior chamber models can be inserted through a small incision, said surgeons here in a discussion of the lenses’ pros and cons. The ICL postop refractive results, he pointed out, are less predictable than the results of anterior chamber lenses, as a higher number of preop parameters are required. Vivarte is an anterior chamber angle-supported lens with rigid haptics, foldable optic and soft footplates (the lens has not yet been CE-marked). www.medennium.com /prof_pub_phakic_iols_ap.htm   (922 words)

Computational Evaluation of the Role of Accommodation in Pigmentary Glaucoma -- Heys and Barocas 43 (3): 700 -- ... of the lens causes the pressure in the anterior chamber to be The pressure in the anterior chamber was slightly lower immediately after the 1.0-second accommodation, because of more extensive drainage from the anterior chamber during accommodation. Case study of extent of accommodation, which is shown as a change in anterior chamber depth, changing from the base value of 0.2 mm to a value of 0.6 mm. www.iovs.org /cgi/content/full/43/3/700   (4493 words)

Diagnostic anterior chamber paracentesis in uveitis: a safe procedure? -- Van der Lelij and Rothova 81 (11): 976 -- ... Anterior chamber paracentesis appears to be a safe procedure in the hands of an experienced Anterior chamber paracentesis for diagnostic purposes is not yet a routinely used technique. A standardised procedure was used for anterior chamber paracentesis in all patients. bjo.bmjjournals.com /cgi/content/full/81/11/976   (2261 words)

OSL: Anterior Chamber Maintenance During Drainage of a Suprachoroidal Hemorrhage in Two Phakic Eyes   (Site not responding. Last check: 2007-10-25) Because their eyes were phakic, an anterior chamber maintainer, as opposed to a 23-gauge butterfly needle, was used for aqueous replacement during hemorrhage drainage. No damage to anterior chamber structures occurred, and the postoperative course was unremarkable in both patients. The anterior chamber maintainer is a useful alternative instrument in such cases. www.slackinc.com /eye/os/stor0996/birt.htm   (196 words)

UIC Eye Pathology - Laboratory Services After anterior segment surgery, the intraocular pressure may be high or the surgeon may observe a persistent, chronic anterior chamber "cell and flare". A mass in the iris or ciliary body may shed cells into the aqueous which may be captured and identified after anterior chamber paracentesis. Before proceeding with the anterior chamber paracentesis, have a suitable fixative on hand (Saccomanno fluid works well or one may use 95% ethanol) and a small vial with a cap that can be screwed on tightly. www.uic.edu /depts/mcpt/eyepath/specac.htm   (344 words)

Silicone oil in the anterior chamber. A total of 42 cases (42 eyes) with silicone oil in the anterior chamber after pars plana vitrectomy (PPV) and after silicone oil injection into the vitreous cavity (SIV) were analyzed. There was a definite correlation between elevated intraocular pressure (IOP) and the presence of silicone oil in the anterior chamber; the IOP dropped significantly on removal of the oil. The treatment and prevention of conditions involving silicone oil in the anterior chamber are briefly discussed. www.aegis.com /aidsline/1989/sep/M8990684.html   (379 words)

Assessment of the anterior chamber 1) Slit lamp examination of the visible anterior segment structures and aqueous for aqueous flare and cells, posterior or anterior synechiae, iris hypoplasia, abnormal iris vessels or pigmentation, Krukenberg's spindle. 2) Slit lamp estimation of the anterior chamber "angle" (e.g. (a) Direct gonioscopy - the anterior curve of the contact lens (goniolens) is such that the critical angle is not reached and the light rays are refracted at the contact lens/air interface (Figure 3) www.academy.org.uk /lectures/barnard12.htm   (510 words)

Cataract Surgery IOLMaster IOL Master Anterior Chamber Depth ACD Mode Zeiss IOLMaster Explanation : Calculation of the anterior chamber depth requires the input of the corneal radius. If you performed a keratometer measurement before the measurement of the anterior chamber depth, the system will automatically use the measured radius for the calculation. Just remember that, if you take additional measurements of anterior chamber depth, the previously measured values will be overwritten. www.a-scan.net /iol-master/acd.htm   (1597 words)

FLIGHTINDUCED ANTERIOR CHAMBER ANGLE BLOCK AFTER TRABECULECTOMY - A NEW SYNDROME   (Site not responding. Last check: 2007-10-25) In eyes which underwent trabeculectomy the vitreous space might undergo an expansion and squeeze out the anterior chamber by overfiltration. Slitlamp biomicroscopy showed a shallow anterior chamber while the pupil was mid-wide and the filter blub stood. In ultrasoundbiomiaoscopy the forward displacement of the iris-lens-diaphragma could be seen as well as an anterior rotation of the ciliary body and the iris-trabecular block. www.dog.org /1998/e-abstract98/92.html   (259 words)

Fluid Flow in the Anterior Chamber of a Human Eye (ResearchIndex) Fluid flow in the anterior chamber of a human eye Abstract: A simple model is presented to analyse fluid flow in the anterior chamber of a human eye. The flow, whose reduced Reynolds number is small, is viscosity dominated and is driven by buoyancy e#ects which are present because of the temperature di#erence between the front and back of the anterior chamber. citeseer.ist.psu.edu /485195.html   (529 words)

All Images - Digital ophthalmology   (Site not responding. Last check: 2007-10-25) In the anterior chamber at 6 o'clock position a dark pool of blood with a flat top is visible. Lens dislocation into vitreous: the edge of dislocated lens is visible at 3-5 o'clock and destructively changed vitreous is herniated in pupil and anterior chamber Anterior chamber is deep and vitreous herniated into it. www.bmii.ktu.lt:8081 /unrs/eyes?trg=img   (1270 words)

Try your search on: Qwika (all wikis)

About us   |   Why use us?   |   Reviews   |   Press   |   Contact us   Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.