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Results for “IRIDECTOMY”

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At least 973 records · Page 54Linked to original sources

PubMed1982

[Long-term experiences with scleral cauterization in anti-glaucoma surgery].

The authors evaluate their experience with basal iridectomy and scleral cauterization on 117 eyes. On 80 eyes the operation was carried out according to the classic method of Scheie, on 37 eyes with a modification using the scleral flap. Intraocular pressure was compensated in 80% of the patients on whom the classic method was used, including the administration of miotica and in 91.8% of those who underwent the modified procedure with scleral flap. Special Consideration is given to the problem of lens opacification in the postoperative course. No postoperative infections were encountered.

Cataract Extraction↗

PubMed1982

Argon laser iridotomy in angle-closure glaucoma: a comparison of two methods.

Argon laser iridotomy was performed in a total of 141 eyes with angle-closure glaucoma, using a modified contact lens of Abraham, by means of two methods, both comprising two-step burns of the iris. While the first-step burns were carried out under similar conditions in both methods, the duration of the second-step burn was 0.2 seconds in Method I (long-burn technique) and 0.02 seconds in Method II (short-burn technique). Iris perforation was achieved in one session in 91% of 101 eyes by the former and in 100% of 40 eyes by the latter technique. Both techniques caused a transient elevation of the intraocular pressure (IOP), but it subsided within 24 hours. Retrobulbar injection of lidocaine or instillation of timolol or indomethacin oil drops did not suppress the IOP rise. Also, iritis was seen in all cases, but it disappeared within one week. No anterior chamber hemorrhage nor retinal hazard was encountered. Corneal clouding was mild and rare by the short-burn technique, permitting iridotomy to be carried out in the iris periphery of the upper quadrants. By the long-burn technique, however, the corneal clouding often prevented continued laser irradiation. A comparison with the results of the conventional peripheral iridectomy revealed that the present short-burn technique is a safe and efficient procedure for the treatment of angle-closure glaucoma.

Adult↗

PubMed1981

Fluorescence angiographical studies in the diagnosis and follow-up of tumors of the iris and ciliary body.

The clinical and detailed angiographical findings taken during the follow-up of 182 patients with tumors of the iris and the ciliary body reported. On the basis of different angiographic staining patterns, these tumors were divided into three groups. Group I: Clinically, as a rule darkly pigmented, slightly or nonprominent tumors, which do not take up fluorescein at all, i.e. no staining of the tumor of its surroundings during the whole angiogram. 107 patients with such a tumor type did not show any clinical or angiographical changes during several years of follow-up. Those tumors which were excised (4) proved to be nevi. We therefore believe this fluorescein pattern indicates a benign lesion so that examination every 6 months suffice. Group II: These are usually less pigmented and only slightly prominent and have their own vascular network. On fluorescein angiography there is dye leakage within the tumor and into the surrounding iris stroma as well as into the aqueous humor. Of a total of 52 cases 9 were excised via iridectomy or iridocyclectomy. Of these 5 were shown to be benign nevi, 4 however were diagnosed as malignant melanomas. We therefore classify this fluorescein angiographical pattern as belonging to potentially malignant tumors, needing frequent controls, i.e. at 3-month intervals. Group III: Clinically these tumors are usually darkly pigmented, extremely prominent and mostly situated in the peripheral iris, originating here or spreading forward from the ciliary body. They are usually vascularized and show - if the melanin content is not too dense - early mottled staining in the vicinity of the tumor. They furthermore always have a marginal central borderline fluorescence as a typical sign, often accompanied by dye leakage from normal iris vessels, representing so-called 'tumor iritis'. 18 tumors of this type were excised via iridocyclectomy or enucleation and all were shown to be malignant melanomas of the iris or the ciliary body on histopathological examination. This fluorescence pattern group of tumors should always be regarded as definitely malignant, and therefore need prompt surgical excision.

Adult↗

PubMed1980

Use of argon laser energy to produce iridotomies.

Laser iridotomy with the c-w argon laser and the pulsed argon laser has been performed in some 300 eyes, 215 of which are included in the present investigation. Using techniques described in this study, a laser iridotomy was made successfully in 95% of cases. However, in a series of 77 consecutively treated eyes that were followed at regular intervals for up to four years, 34% required retreatment. In no case did an iridotomy close if it remained patent for 6 weeks. The optimum results were obtained using a contact lens and a 50-mu or 100-mu laser spot with energy levels of 0.5 to 2.0 w for 0.2 sec. Larger spots and higher powers, even when combined with shorter pulses, were either less effective or produced superficial corneal burns. The ease with which an iridotomy could be made was partly dependent on iris color and thickness, corneal tolerance and deturgescence. However, success will, in large measure, depend on the technician's proficiency and experience. A test of patency was the visibility of lens capsule through the iridotomy. Even so, a mistaken estimation of patency could result if there were posterior synechiae around the margin of the iridotomy or if one failed to recognize the presence of a barely-visible fibrous membrane bridging the hole. Complications that occurred with laser iridotomy included corneal epithelial and endothelial burns, lens opacity behind the iris defect, and retinal burn. The lens opacity was found to be caused by localized fragmentation of lens fibers and atrophy of the lens epithelium. Iris angiography performed 6 to 36 months after laser iridotomy in human eyes failed to reveal any disturbance in vascular permeability and the blood-aqueous barrier. Laser iridotomy was considered the procedure of choice in monocular patients and for treating the fellow eye in persons who suffered a complicated peripheral iridectomy by surgery in one eye. The laser played an important role, not only in treatment, but also in diagnosis of chronic angle-closure and combined-mechanism glaucoma.

Animals↗

PubMed1980

[Treatment of primary closed angle glaucoma].

Surgery is the treatment of choice in angle closure glaucoma. Exceptions to this rule are rare. Peripheral iridectomy is the operation in reversible forms: asymptomatic forms, drug normalized attacks without anatomic alterations of the anterior segment, and when both eyes have the same biometry. Trabeculectomy is the treatment of all irreversible forms: attacks that are not controlled even with intensive medical management and subacute forms that progress to chronic angle closure glaucoma. Indication for combined cataract-trabeculectomy surgery are discussed in the text.

Acute Disease↗

PubMedDate not supplied

[Experience in laser treatment of primary glaucoma].

An Interdistrict Laser Center has been functioning in Vladivostok for 10 years. Laser exposure was used in the treatment of 749 patients with primary glaucoma. Yatagan-1, Orion-3001, YAG Pegaus-3002 lasers (Germany) were employed. In 55% cases primary glaucoma was concomitant with essential hypertension, in 12% with diabetes mellitus. Laser iridectomy, laser goniopuncture, laser trabeculoplasty were used. Hypotensive effect lasting for at least 6 months was attained in 69.1% cases. Complications presenting as hemorrhages in the anterior chamber, which spontaneously resolved on day 2 after exposure, were observed in only 4% cases. Laser therapy in patients aged 50 to 70 is the only means of reducing ophthalmic tone and preserving the visual function because of somatic diseases present at this age. Laser treatment of primary glaucoma brings about an appreciable economic effect and creates favorable conditions for subsequent microsurgery.

Adult↗

PubMedDate not supplied

[Late postcontusion secondary glaucoma].

The investigation of 33 patients with late postcontusional glaucoma subjected to surgery and followed up for 25 +/- 8.24 months has revealed: the interval accident-surgery is shorter in the close-angle combined forms; the essential mechanisms responsible for glaucoma occurrence are: the alteration of trabecular meshwork (for open-angle glaucoma) and pupillary block (for close angle glaucoma); simple cases required antiglaucoma surgery (trabeculectomy, peripheral iridectomy) and the mixed ones required combined (trabeculectomy, lens extraction, lens implant) or sequential surgeries (antiglaucoma surgery, vitrectomy etc); the glaucomatous process was stopped in 83.4% of the open-angle glaucoma cases and progressed in 23.5% of the close-angle glaucoma cases; the functional improvements post antiglaucoma surgery combined with removal of opacities are lessened by the higher frequency of severe per- and post-operative complication.

Contusions↗

PubMed1995

Clinical studies of primary angle closure glaucoma.

The ocular anatomic features, pupil-blocking force, status of angle synechia closure and positivity of provocative tests were compared between the primary chronic angle closure glaucoma (PCACG) and primary acute angle closure glaucoma (PAACG) by ultrasonic biometry, computerized image processing technique of the anterior ocular segment, gonioscopy and provocative tests. The studies showed that the anterior chamber depth of PAACG was shallower than that of PCACG, the pupil-blocking force of PAACG was stronger than that of PCACG, the status of angle synechia closure of PCACG was mainly creeping synechia closure and the positivity of mydriasis test after iridectomy was much higher (37.93%) in PCACG than that (11.43%) in PAACG. These facts suggested that the mechanisms of the angle closure of more than half of PCACG cases be multiple, besides the mechanism of pupillary block. Therefore, the authors emphasize that the pupillary block must be eliminated as well as the other mechanisms for the treatment of PCACG. The criteria of diagnosis and principles of management of PCACG were proposed.

Adult↗

PubMed1995

Iris melanoma in ocular melanocytosis.

A pigmented, circumscribed iris lesion thought to be a nevus was noted in the right eye of a 64-year-old man with congenital ocular melanocytosis. Although the patient had excess episcleral and choroidal pigmentation, the iris in the affected eye was blue. Two years later, growth was documented, suggesting that the lesion was malignant. The tumor was resected by a sector iridectomy and studied by light microscopy. Histopathologically, the tumor was shown to be a malignant melanoma of the mixed-cell type. No evidence of congenital melanocytosis was found in the adjoining normal iris. This is a well-documented case of a malignant melanoma of the iris arising in a blue, uninvolved iris in a patient with sectoral congenital ocular melanocytosis. Although this specific association has not been previously reported, we believe that any pigmented uveal tumor occurring in the setting of congenital ocular melanocytosis should be observed closely for growth that can signal malignant transformation.

Choroid Neoplasms↗

PubMed1994

Primary chronic angle-closure glaucoma in Chinese--a clinical exploration of its pathogenesis and natural course.

Forty-three cases (86 eyes) of primary chronic angle-closure glaucoma were randomly selected. An additional 44 cases (77 eyes) of primary acute angle-closure glaucoma and 30 normal subjects (34 eyes) were also randomly enrolled as control groups for comparison in the clinical study. Ultrasonic biometric measurements of the anterior chamber depth, lens thickness and axial length of the eyeball were performed. Using an potic microgauge attached to the slit-lamp, the entrance of anterior chamber angle was also calculated. The clinical manifestations and the natural course, including the characteristic appearance of anterior chamber angle, the form of peripheral anterior synechia as well as the facility of outflow, were carefully investigated. There were significant differences in the biometric parameters of the anterior segment of eye among above three groups. The facts reveal that the anatomic features of eyeball, especially in the anterior segment differentiate from those of primary acute angle-closure glaucoma. Follow-up study for the early stage cases showed that topical administration of miotics and/or peripheral iridectomy can effectively prevent iris from forming peripheral anterior synechia and thus halt its development. The criteria of diagnosis and the principles of prevention and treatment at the early stage cases were presented. The pathogenesis was discussed. We emphasized that the progressive stage after intermittent attacks of primary acute angle-closure glaucoma should not be confused with primary chronic angle-closure glaucoma.

Adult↗

PubMed1994

Mechanism and etiology of primary chronic angle closure glaucoma.

The ocular anatomic features, pupil-blocking force, status of angle synechiae closure and positivity of provocative tests were compared between the primary chronic angle closure glaucoma (PCACG) and primary acute angle closure glaucoma (PAACG) by using ultrasonic biometry, computerized anterior ocular segment image processing technique, gonioscopy and provocative tests. The studies showed that the anterior chamber depth of PAACG were shallower than that of PCACG; the pupil-blocking force of PAACG was stronger than that of PCACG; the status of angle synechiae closure of PCACG were mainly creeping synechiac closure; the positivity of mydriasis test was much higher (46.01%) in PCACG than that (6.8%) in PAACG after iridectomy. These facts suggest approximately half of the PCACG cases may be mult-mechanism to contribute to the angle closure besides the mechanism of pupillary block. Therefore, the authors emphasis that the pupillary block must be eliminated as well as the other mechanism for the treatment of PCACG and finally, a criteria of diagnosis and principles of management of PCACG were proposed.

Adult↗

PubMed1995

[Acute angle-closure glaucoma].

Acute angle-closure glaucoma is an ocular disorder essentially linked to specific anatomical formations, particularly hereditary, in which, as of a critical age and influenced by random triggering factors, unilateral or bilateral blockage of the pupil occurs. This leads to closing of the iridocorneal angle followed by severe ocular hypertonia and, if emergency treatment is not begun, to severe complications of the eye and the vision. Treatment is first by osmotic agents (acetazolamide), beta-blocking collyria and myotic agents, followed obligatorily by surgical or laser iridectomy of the affected eye, then of the other eye as a preventive measure.

Acute Disease↗

PubMed1994

The clinical analysis of secondary glaucoma following posterior chamber intraocular lens implantation.

We present 14 patients with secondary glaucoma following the implantation of a posterior chamber intraocular lens (IOLs). All patients were unilateral glaucoma, which developed within 1 month following the IOL implantation in 10 cases, and from 1 to 3 years in 4 cases. The angle of anterior chamber was open in 8 patients, and close in 6 ones. Seven patients required treatment of antiglaucomatous medicine; 4 patients underwent laser iridectomy and 3 patients required antiglaucoma surgery. The results showed that the corrected visual acuity was more than 0.5 in 28% of the patients before antiglaucoma treatment and in 50% of the patients after treatment. The main cause of poor vision is glaucomatous optic nerve atrophy. It suggests that it is important to find glaucoma early.

Adolescent↗

PubMed1994

[A clinic report of 54 cases of reconstruction for the anterior segment of eye].

54 cases (54 eyes) of severe injury in the anterior segment of eye with little light perception were treated by reconstruction for the anterior segment of eye. The results showed that the eyeballs in 48 cases (88.9%) were survived successfully, and 28 cases (51.9%) of the grafts were clear. The procedures included keratoplasty, iridectomy, lensectomy, anterior vitrectomy, and reconstruction of the anterior chamber to restore the cosmetic shape of the eyeball. The indications, complications of the operation, and the surgical technique are discussed.

Adolescent↗

PubMed1993

[Narrow angle type of chronic simple glaucoma: a report of 9 cases].

Nine patients (16 eyes) with narrow angle type of chronic simple glaucoma were evaluated. Besides the general definition, narrow angle type of chronic simple glaucoma is a special type of primary open angle glaucoma which has a narrow and open angle on goniogscopy, no obvious difference on angle configuration at low or high IOP. Laser peripheral iridectomy may be a method of differential diagnosis in this type of glaucoma and may be relatively effective in preventing further attacks of acute angle closure glaucoma which is due to the lens continues to enlarge with age and causes pupillary block. The medical treatment is the first choice to deal with this type of glaucoma, while it can not be controlled, the filtering operations should be used in time.

Diagnosis, Differential↗

PubMed1993

[The diagnosis and treatment of the secondary glaucoma caused by epithelial ingrowth into the anterior chamber].

This study reports the clinical manifestations of 3 cases (3 eyes) of the secondary glaucoma caused by epithelial ingrowth into the anterior chamber. Based on some clinically suspected signs, we confirmed the diagnosis of epithelial ingrowth by means of the diagnostic argon laser photocoagulation to make the characteristic white burns in the site of the affected iris. Three eyes with epithelial ingrowth underwent extensive laser photocoagulation on the affected iris by delineating the extent of the epithelial membrane before the therapy. Then excisions of the involved iris and pupillary membrane, anterior segment vitrectomy and trabeculectomy were done on two aphakic eyes. The remaining phakic eye only received the thermal sclerostomy combined with sector iridectomy. The epithelial ingrowth was verified postoperatively by the histopathological examination of the specimens from the excised iris. Optimal reductions in intraocular pressures were observed in two eyes with the epithelial ingrowth of the iris (less than 70%), and in another eye with the extensive involvement of the iris (more than 70%). Medical therapy was required to normalize IOP in addition to the surgical procedure. The follow-up period ranged from 8 to 15 months.

Adolescent↗

PubMed1993

[Traumatic lens dislocation-related glaucoma].

Among 106 patients of traumatic lens dislocation, comprising 70 males and 36 females aged 3-90 years, secondary glaucoma occurred in 93 cases (87.7%). The authors are of the opinion that lenses dislocated into the anterior chamber should be removed as soon as possible, and dislocated lens in the vitreous cavity without adhesion to the retina should also be extracted with vitrectomy. For patients with pupil block glaucoma that indicate peripheral iridectomy, the locations of operation should be carefully selected.

Adolescent↗

PubMedDate not supplied

[The beginning of ophthalmology in Moldova].

First data regarding eye diseases consist in empirical treatments mentioned in Dimitrie Cantemir's chronicle. In State Archives of Jassy is mentioned Alexa Teşa, as an oculist established in Jassy starting from 1835. Since 1844 has come in Jassy the second oculist, Ludwig Miscolti, who possessed the title of "Magister Oculist". The Moldavian ocular surgery has start in 1848 due to Ludowic Russ Senior, the doctor of the Royal Court of Mihai Sturza. In a 45-years period he had done over 45,000 operations, including cataract surgery, iridectomy, synechotomies, and strabismus operations. Since 1856 has been also mentioned Edward Zielinschi, who had done itinerant operations in the towns of Moldavia. In 1879 has been founded the Faculty of Medicine of Jassy, and starting from 1881 the first titular of Surgical and Ocular Clinics was Leon Sculy-Logothetis, former assistant of the professor Ludowic Russ.

General Surgery↗