What's the difference between iridectomy and iris?
Iridectomy
Definition:
(n.) The act or process of cutting out a portion of the iris in order to form an artificial pupil.
Example Sentences:
(1) Peripheral iridectomy for primary acute angle-closure glaucoma controlled the condition without any need for further medical or surgical therapy in 72% of cases.
(2) In this retrospective study we evaluated 154 patients with primary angle-closure glaucoma operated on by peripheral iridectomy to determine the factors contributing to the high occurrence (57%) of cataracts.
(3) No fluorescein passed through the pupillary margin or the peripheral iridectomy in this group of eyes.
(4) Utilizing a continuous wave argon laser in a multiburn fashion, successful iridectomies were achieved in 42 of 45 phakic eyes with either acute or chronic angle-closure glaucoma.
(5) The argon laser and the ruby laser have been used to open the pigment layer in three cases of surgically incomplete peripheral iridectomy.
(6) Formation can be reduced by elimination of the iridectomy, elimination of routine mydriatic drops, and minimization of iris trauma at the time of surgery.
(8) Goniosynechialysis (GSL) was performed in 70 eyes with primary angle-closure glaucoma in which the intraocular pressure (IOP) could not be controlled with laser or surgical iridectomy.
(9) Corneal contusion, McCannel suture, YAG laser iridectomy, congenital luxation of the lens, and chronic over wearing of contact lenses all cause traumatic changes.
(10) In simple glaucoma if a filtering operation is performed, the iridectomy is fundamental in order to have a good communication between the posterior chamber and the filtering bleb and to avoid iris incarceration into the filtering wound.
(11) Other complications associated with the use of intravitreal silicone oil included biomicroscopically visible silicone oil emulsification (0.7%), keratopathy (5.5%), glaucoma (6%), closure of the inferior iridectomy (6%), and reproliferation of epiretinal and subretinal fibrous membranes (40%).
(12) A retrospective study of 57 eyes with chronic angle-closure showed that eyes with visual field loss are less likely to be improved by iridectomy than those without visual field loss in the presence of visual field loss, trabeculectomy achieved more satisfactory control of glaucoma than did iridectomy, and there was no noticeable difference in surgical complications between iridectomy and trabeculectomy in this small series.
(13) Light and electron microscopic studies of YAG laser iridotomies were performed in two human iridectomy specimens.
(14) The need to carry out a peripheral iridectomy in the other eye is stressed, irrespective of the age of the patient.
(15) Results were compared for each technique with and without peripheral iridectomy.
(16) Trabeculectomy was significantly more successful (93%) than iridectomy (64%) in treating cases with field loss.
(17) The anterior chamber was entered at the surgical corneoscleral limbus beneath the corneal flap and the peripheral iridectomy was completed without difficulty.
(18) None, however, required laser iridectomy, trabeculoplasty, or trabeculectomy.
(19) Typical aphakic and pseudophakic retinal breaks were found only in eyes having undergone peripheral iridectomy: our conclusion is that peripheral iridectomy is a risk factor for typical retinal breaks.
(20) Of them, peripheral iridectomy was made in 115, and iridotomy in 82 patients (in 10--parallel to limbus, in 72--radially towards limbus).
Iris
Definition:
(n.) The goddess of the rainbow, and swift-footed messenger of the gods.
(n.) The rainbow.
(n.) An appearance resembling the rainbow; a prismatic play of colors.
(n.) The contractile membrane perforated by the pupil, and forming the colored portion of the eye. See Eye.
(n.) A genus of plants having showy flowers and bulbous or tuberous roots, of which the flower-de-luce (fleur-de-lis), orris, and other species of flag are examples. See Illust. of Flower-de-luce.
(n.) See Fleur-de-lis, 2.
Example Sentences:
(1) The advantages of the incision through the pars plana ciliaris are (1) easier approach to the vitreous cavity, (2) preservation of the crystalline lens and an intact iris, and (3) circumvention of the corneal and chamber angle complications sometimes associated with the transcorneal approach.
(2) The so-called apparent accommodation has been measured in patients implanted with anterior chamber, iris support and posterior chamber IOLs.
(3) These patients did not have narrow anterior chamber angles preoperatively, and several were aphakix with surgical iris colobomas.
(4) A 1.5-year-old girl presented with a peripheral iris mass.
(5) In normal as well as in cirrhotic subjects somatostatin infusion provoked a marked reduction of the IRI plasma level and this was uninfluenced by subsequent glucagon administration.
(6) While tonic pupil and reduced sweating can be attributed to the affection of postganglionic cholinergic parasympathetic and sympathetic fibres projecting to the iris and sweat glands, respectively, the pathogenesis of diminished or lost tendon jerks remains obscure.
(7) Adrenergic desensitization of the eye resulted in attenuation of: The polyphosphoinositide response in the iris, measured both as loss of 32P-radioactivity from phosphatidylinositol 4,5-bisphosphate (PIP2) and as IP3 accumulation; the epinephrine-stimulated liberation of AA, from membrane phosphoinositides and other phospholipids, and PGE2 release in the iris; and the epinephrine-induced muscle contraction in the iris dilator.
(8) ChAT activities of the iris, adrenal gland, and superior cervical ganglion were similar in all groups.
(9) Plasma glucose, insulin (IRI), glucagon (IRG) and SRIF-LI were measured.
(10) The appearance in aqueous humor of selected metabolites of arachidonic acid metabolism at various times was correlated with the influx of protein and myeloperoxidase activity in the iris-ciliary body.
(11) A decrease in the levels of IRI, C-peptide and biological activity of serum insulin in the 1st group indicated a possibility of type I diabetes mellitus in such patients.
(12) When using a nylon thread for the attachment of a pseudophakos to the iris, it may happen that the suture is slung tightly around the implant-lens.
(13) Iris prolapse did not interfere with the procedure.
(14) While there are many potential causative factors, erroneous concepts of IOL positioning and design appear to have led to PBK with many iris-supported and anterior chamber lens styles.
(15) Examples include the specific pattern of hypodontia seen before the development of iris dysplasia in Rieger syndrome, and the presence of supernumerary teeth and facial osteomas preceding malignant transformation of intestinal polyps in Gardner syndrome.
(16) Soft lenses also provide the options of disposability and of iris color change.
(17) Fluorescence angiography of the iris was performed on 135 patients with diabetes mellitus.
(18) These increases paralleled the in vitro rise in iris [3H]norepinephrine ([3H]NE) uptake, a measure of the presence of functional nerve terminal membrane.
(19) Pigmentations are significantly related to the colour of the iris (visible in 8% of blue irides, against in 40% of brown).
(20) Plasma C-peptide immunoreactivity (CPR) and immunoreactive insulin (IRI) increased during the infusion.