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At least 55 records · Page 3Linked to original sources
PubMed1978

The long-term effects of iridectomy for primary acute angle-closure glaucoma.

Forty-nine eyes were treated with iridectomy for primary acute angle-closure glaucoma. Forty asymptomatic, normotensive fellow eyes were similarly treated. The duration of follow-up after surgery was 52.3 +/- 3.6 months. Thirty-seven (76%) of the eyes with acute attacks were cured by iridectomy alone and required no medical therapy. Twelve eyes (24%) developed increased intraocular pressure following iridectomy, but only one eye (2%) required filtering surgery. Eighty-eight percent of the asymptomatic, normotensive fellow eyes required no subsequent therapy, and none developed visual field defects. Visual acuity was unchanged in 22 of 49 (45%) of the acutely involved eyes and decreased more than six lines in 11 (22%) eyes. In the 40 fellow eyes, visual acuity was unchanged in 63% and decreased more than six lines in only one (2%) eye.

Aged↗
PubMed1979

Continuous wave argon laser iridectomy in angle-closure glaucoma.

By using a continuous wave argon laser in a multiburn fashion, successful iridectomies were achieved in 42 out of 45 phakic eyes with either acute or chronic angle-closure glaucoma. Five of the successful procedures required multiple sittings on different days or abandonment of the primary treatment site in favor of an alternate site, or both, to attain patency. Within the immediate postoperative period, ten eyes needed retreatment to eliminate moderate pigment proliferation at the perforation site. The procedure was performed on an outpatient basis under topical anesthesia, usually required less than one-half hour for completion, and resulted in only minimal complications. Therefore, continuous wave argon laser iridectomy appears to present a viable alternative to surgical iridectomy for the definitive treatment of angle-closure glaucoma, although long-term evaluation of this modality of therapy is presently unavailable.

Adult↗
PubMed1991

Identification, prevention, and treatment of silicone oil pupillary block after an inferior iridectomy.

We treated two patients in whom silicone oil pupillary block developed despite a patent inferior iridectomy. The clinical characteristics of this complication were a deep anterior chamber, specular reflexes from the iris surface, identification by biomicroscopy of aqueous trapped inferiorly in the vitreous cavity, and no convection currents in the anterior chamber. This complication may be prevented by early face-down positioning of the patient after the operation, and the avoidance of large, centrally located, inferior iridectomies. We recommend that the iridectomy be placed peripherally no larger than 2 mm and propose a new technique for breaking the silicone oil block, which was clearly successful in one of the patients.

Anterior Chamber↗
PubMed1983

Anterior chamber lens subluxation through a basal peripheral iridectomy.

The superior supporting footplate of the Tennant-Anchor anterior chamber lens can subluxate through a basal peripheral iridectomy. In each of the three cases reported herein, the implant migrated superiorly along the ciliary body pars plana. In two cases, the lens implant was stabilized by adhesions of the superior supporting footplate to the ciliary body. In the third case, lens movement (pseudophakodonesis) caused the inferior lens footplate to rub against the corneal endothelium, producing secondary iridocyclitis and cystoid macular edema which required intraocular lens removal and exchange. This complication may be prevented by performing a mid-peripheral iridectomy or iridotomy rather than a large basal iridectomy.

Aged↗
PubMed1989

Silicone oil in the aphakic eye: the influence of a six o'clock peripheral iridectomy.

Complications after six months, in a series of 44 aphakic eyes treated by vitrectomy and fluid/silicone-oil exchange with six o'clock (Ando) peripheral iridectomy, are reported. Comparisons are made with the complications after six months in a similar series treated prior to the introduction of the six o'clock iridectomy. It is concluded that a patent six o'clock iridectomy is effective in reducing the complications of intraocular silicone oil in the aphakic eye.

Adolescent↗
PubMed1990

The superior peripheral iridectomy: prevention of pupil block due to silicone oil.

Superior peripheral iridectomy has been performed in 40 patients who have undergone silicone oil surgery for retinal detachment and who are aphakic. Only two developed raised intraocular pressure due to pupil block by liquid silicone and in each case the iridectomies seemed to be closed by proliferative membrane rather than the silicone meniscus. This type of iridectomy is particularly suitable in patients requiring intracapsular cataract extraction after previous vitrectomy and silicone oil surgery.

Adult↗
PubMed1983

[Results of iridectomy in narrow-angle and open-angle glaucoma. A retrospective study].

Between 1970 and 1975 166 iridectomies were performed in cases of primary glaucoma. In the retrospective study reported here the authors analyzed the results with regard to the regulation of intraocular pressure (IOP) and loss of function. Follow-up examinations were performed (1) between 6 weeks and 6 months, (2) 12 months, (3) 1.5 to 2.5 years and (4) 3 to 4 years after surgery in patients whose IOP was not adequately regulated. Hypotonia was rare. Of the eyes with acute narrow-angle glaucoma with an open iridocorneal angle by definition, which underwent surgery for the first time, 30% had an IOP of more than 21 mm Hg with or without additional tension-lowering medication (20% between 22 and 24 mm Hg, 10% over 24 mm Hg). The results for eyes operated on for the second time were better because of the prophylactic iridectomies in this group. In one-third of the cases the iridocorneal angle was occluded; in two-thirds an open angle was found. An analysis revealed that regulation was better when the previous tension level had been high, while lower tension levels, of between 20 and 35 mm Hg, often remained elevated after surgery. Out of the total number of eyes operated on for the first time (narrow-angle and open-angle glaucoma) IOP was regulated by iridectomy alone in 54% after 1 year and in 33% after 2 years. With regard to the iridocorneal angle of these 33%, it was found that 50% of the cases of narrow-angle glaucoma were regulated without further medication, but only 20% of the open-angle cases.(ABSTRACT TRUNCATED AT 250 WORDS)

Aged↗
PubMed2000

Efficacy of latanoprost as an adjunct to medical therapy for residual angle-closure glaucoma after iridectomy.

Residual primary angle-closure glaucoma (PACG) after iridectomy is an important issue among Asians, especially Chinese. In this study, we tested the effectiveness of latanoprost as an intraocular pressure (IOP) lowering agent in cases of residual PACG. Twenty-six eyes of 26 PACG patients with persistently elevated IOP after iridectomy, despite treatment with conventional IOP lowering drugs (beta blockers and pilocarpine) were included. Latanoprost 0.005%, one drop daily, was added adjunctively to all eyes. Measurement of IOP at baseline and after the start of treatment with latanoprost indicated a significant IOP reduction. The IOP decreased by about 21% (p < 0.005) during the first 3 months, and showed a reduction of about 36% at the end of 1 year. At the 1-year follow up, the IOP was well controlled (below 20 mmHg) in all eyes. These findings show that, in combination with beta blockade and pilocarpine, latanoprost can ameliorate residual PACG after iridectomy and could potentially forestall the need for further therapeutic intervention.

Adjuvants, Pharmaceutic↗
PubMed1987

Basal iridectomy at 6 o'clock in the aphakic eye treated with silicone oil: prevention of keratopathy and secondary glaucoma.

In the aphakic eye, with intact iris diaphragm, silicone oil has frequently caused a pupillary block. In this situation aqueous humour accumulates behind the iris and forces silicone oil through the pupil into the anterior chamber. An iridectomy at the 6 o'clock position can effectively prevent this pupillary block. The iridectomy allows free passage of aqueous to the anterior chamber which remains free of silicone oil. No permanent contact with silicone oil and the cornea is established, and development of keratopathy is prevented. The effect of this iridectomy in 62 eyes with intact iris diaphragm in patients in Rotterdam (35 cases) and Nagoya (27 cases) is demonstrated. Only in 6.5% of the cases was silicone oil present in the anterior chamber at the end of the follow-up period of 7 months.

Aphakia, Postcataract↗
PubMed1999

Recurrent herpetic keratitis induced by laser iridectomy: case report.

The mechanism for herpetic keratitis reactivation remains unclear. When observed clinically, the reactivation may be associated with a variety of endogenous and exogenous stimuli, such as strong sunlight, fever, menstruation, and psychiatric disturbances. In experimental studies, most methods of inducing recurrence have involved some degree of corneal trauma, inflammation, neuronal stimulation, or damage to the nerves that innervate the cornea. Although corneal damage after laser iridectomy (LI) is well documented, recurrent herpetic keratitis induced by LI has never been reported. Here we present an unusual case of recurrent herpetic keratitis induced by LI. The location of the bullous keratopathy was strongly correlated to the site of laser iridectomy. Clinical findings as well as the dramatic response to antiviral treatment supported the diagnosis. Although the energy for laser iridectomy is relatively safe for most circumstances, the possibility of inducing herpetic keratitis cannot be ignored. Therefore it is important for clinicians to beware of this potential complication.

Aged↗
PubMed1976

Peripheral argon laser iridectomy in narrow-angle glaucoma.

Gas argon laser peripheral iridectomy was attempted as an alternative to surgical peripheral iridectomy in the treatment of acute angle-closure glaucoma and the prophylactic treatment of fellow eyes. Success was achieved in eyes with a blue iris if sufficient energy was given to achieve a permanent red reflex. Reasons for failure in eyes with a heavily pigmented iris are discussed. The procedure must be greatly improved before surgical peripheral iridectomy is superseded as the treatment of choice.

Argon↗
PubMed1990

[Laser iridectomy in tuberculous uveitis complicated by glaucoma and ophthalmic hypertension].

By means of an ophthalmological device "Iatagan", laser iridectomy, in personal modification, was made in 54 patients with chronic (in 40 cases--tuberculosis) uveitis in 67 eyes with predominantly organic changes in the anterior chamber angle. Before operation, ophthalmic hypertension was recorded in 55 eyes, of them glaucoma of different stages--in 43 (in 12 eyes intraocular pressure was normal). In immediate and remote terms, normalization of intraocular pressure was achieved in more than 60% of cases. Complications were rare and, as a rule, easily removed. There were no essential differences in effectiveness of laser iridectomy used in tuberculous and nontuberculous uveitis. The results obtained speak about the expediency of wide usage of laser iridectomy in chronic uveitis for both therapeutic and prophylactic purposes.

Adult↗
PubMed1990

[Long-term results following preventive iridectomy. A retrospective study].

The frequency of complications after surgical iridectomy in angle-closure glaucoma is normally considered low. In order to estimate the influence of the surgical intervention independent from other factors (such as ischemia caused by angle-closure, progression of glaucomatous disease, medical treatment), 35 eyes that had undergone a prophylactic iridectomy because of acute angle closure of the contralateral eye were investigated retrospectively. The mean follow-up time of the 35 eyes was 6.1 years. None of the prophylactically iridectomized eyes developed angle-closure during follow-up. No significant change in visual acuity was present in the group of patients less than 65 years of age (n = 12). This group had a preoperative visual acuity of 0.85 +/- 0.18 and a visual acuity of 0.81 +/- 0.20 at the last visit. A considerable decrease in visual acuity, however, was found in the group of patients more than 65 years of age (n = 23). This group had a preoperative visual acuity of 0.64 +/- 0.24 and a visual acuity of 0.36 +/- 0.23 at the last visit. Biomicroscopically, one eye (8%) in the age group less than 65 years developed further lens opacity, whereas 15 eyes (65%) in the age group more than 65 years developed further lens opacity. In 2 eyes in the older group a cataract operation was performed. Five eyes developed posterior synechiae; in all of these eyes cataract formation increased. The results indicate that cataract progresses more rapidly after iridectomy if the patients are older.(ABSTRACT TRUNCATED AT 250 WORDS)

Aged↗
PubMed1989

[Does peripheral iridectomy increase the risk of retinal detachment in patients with aphakia or pseudophakia?].

A retrospective study of 107 cases of retinal detachment in aphakic and pseudophakic eyes showed different types of retinal break depending upon surgical method. Three techniques were studied: intracapsular extraction (ICCE), intracapsular extraction with anterior chamber lens implant (ICCE, AC-IOL), and extracapsular extraction with posterior chamber lens implant (ECCE, PC-IOL). Results were compared for each technique with and without peripheral iridectomy. 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.

Cataract Extraction↗
PubMed1989

[The expediency of peripheral iridectomy in the surgical treatment of open-angle glaucoma].

Results of surgical interventions in two groups of patients with open-angle glaucoma are analysed and compared. In group one (51 patients) antiglaucomatous operation was made without peripheral iridectomy and in group II (46 patients)--together with the latter. Immediate results after operations on occasion of open-angle glaucoma made without peripheral iridectomy have shown a good hypotensive effect, preservation and a certain improvement of visual functions in the majority of the cases, significant weakening of inflammatory reaction in the eye in early postoperative period as compared with results after operations made together with peripheral iridectomy.

Aged↗
PubMed1988

Nd: YAG laser iridectomies: 100 consecutive cases.

We reviewed the patient charts of our first 100 consecutive Nd:YAG laser iridectomies. Our success rate (99%) is the same as that reported by others. Iris bleeding was not problematic. We did find that relative pupillary block may still be present with a patent but very small Nd:YAG iridectomy; that transillumination is not an adequate criterion for assessing patency; and that a Nd:YAG laser iridectomy, probably in part because of its small size, frequently closes with chronic inflammation.

Aged↗
PubMed1979

Continuous wave argon laser iridectomy in angle-closure glaucoma.

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. Five of the successful procedures required multiple sittings on different days or abandonment of the primary treatment site in favor of an alternate site to attain patency. Within the immediate postoperative period, ten eyes needed further treatment to eliminate moderate pigment proliferation at the perforation site. The procedure was performed on an outpatient basis under topical anesthesia, usually required less than one-half hour for completion, and resulted in only minimal complications. Therefore, CWAL iridectomy appears to present an alternative to surgical iridectomy for the definitive treatment of angle-closure glaucoma, although long-term evaluation of this modality of therapy is presently unavailable.

Adult↗
PubMed1995

[Combined argon and neodymium: yttrium aluminum garnet laser peripheral iridectomy: a new approach in clinical practice].

Laser peripheral iridectomy was performed on 200 eyes (151 cases) with primary acute or chronic angle-closure glaucoma and partly with mixed glaucoma. Following argon laser creating an iridectomy in 2/3-3/4 iris thickness, neodymium: yttrium aluminum garnet (Nd: YAG) laser shot was required to complete a patent iridectomy. This kind of procedure is simple and tends to be more preferable to Asian people with heavily pigmented and thick irides for which a perforation is difficult to be performed. The successful rate of performing a patent iris perforation was 100.0% and 95.0% of them were completed by once of shot. The intraoperative and postoperative complications of this combined procedure appeared to be significantly less than those of either one of them. 161 eyes were followed for more than 2 years. The objective criteria demonstrate that the long-term therapeutic effects of this combined technique are very good. It is recommended to use the procedure extensively in the out-patient clinics.

Adult↗