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Query: UMLS:C0086543 (cataract)
 29,165 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

We constructed scleral tunnel wounds with internal corneal lips and sutureless closures in ten cadaver eyes without previous intraocular surgery. Each wound differed in width, total incision length, and internal corneal lip size. At a low and high range of initial intraocular pressure (IOP, 10 to 15 mm Hg or 20 to 25 mm Hg), we compared the wounds' resistance to leakage during application of external pressure. A square wound with a 4.0 mm width and 4.0 mm overall length, including a 1.5 mm corneal lip, had the optimum wound dimensions. These produced a stable incision that resisted leakage at external pressures up to 525 pounds per square inch equally well at both IOP ranges. Leakage occurred at lower external pressures for wounds with greater width, smaller corneal lips, or wound widths that were greater than wound lengths; such wounds were also more prone to leakage at the low IOP range. When constructed properly and adequately, the 4.0 mm wide scleral tunnel incision with 1.5 mm internal corneal lip is a strong and safe wound for sutureless cataract surgery.
J Cataract Refract Surg 1993 Jul
PMID:Relative strength of scleral tunnel incisions with internal corneal lips constructed in cadaver eyes. 1104 26

The frequency of exfoliation syndrome (EXS) was investigated in a group of Greek patients undergoing extracapsular cataract surgery. Five hundred and nine (509) consecutive cataract patients without any other manifest ocular abnormality were prospectively examined for the presence of EXS. Patients were clinically divided into 3 groups: group I (EXS group) consisted of patients in whom exfoliation material deposition could be seen; Group II (possible EXS group) comprised patients who demonstrated a number of pigmentary signs and group III (normal subjects) comprised patients with senile cataract and no sign of EXS. EXS was found in 140 (28%) of our patients, possible EXS in 119 (23%) and the rest (49%) had no evidence of EXS. Patients with EXS were older (mean age 73.8) when compared to the possible EXS group (70 years) and the control group (64.7 years). The IOP was significantly higher in patients with EXS (mean 15.5 mmHg versus 14.3 mmHg in the other two groups). Blue irides were significantly more common in patients with EXS (19%) than in the possible EXS group (14%) and the controls (4%). EXS is common in Greek cataract patients and this study has identified a large group of patients who may be at an early stage of development of the condition. EXS may predispose to the development of cataract in Greek patients.
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PMID:Frequency of exfoliation syndrome in Greek cataract patients. 895 Mar 98

A number of published case series provide short-term and intermediate success rates for the surgical treatment of glaucoma with trabeculectomy. There is little information, however, regarding long-term outcomes that extend beyond 10 years. Therefore, we conducted a retrospective study to determine the long-term outcome of eyes that had successful trabeculectomy surgery at 1 year (IOP < 21 mmHg, or lowering by 33% if preoperative IOP was < 21 mm Hg) and had been followed up for at least 10 years. We found 40 such eyes. With respect to IOP control, 83% were still considered to be successful at 5 years, 73% at 10 years, but only 42% at 15 years. Ten percent required additional glaucoma surgery by 5 years, 25% by 10 years, and 58% by 15 years. Forty percent of the eyes had cataract surgery by the time of the last follow-up examination. It appears that there is a significant late failure rate of trabeculectomy in eyes that were initially successful.
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PMID:Long-term results of trabeculectomy in eyes that were initially successful. 898 94

The major aim for the application of viscoelastic substances in cataract surgery is prevention of corneal endothelial cell loss. This aim is fulfilled by deepening of the anterior chamber, mechanical endothelium protection against surgical trauma, absorption of ultrasound energy, and coating of intraocular lens. The first and mostly used viscoelastic in ophthalmic surgery is a 1% solution of sodium hyaluronate (NaHA) with a molecular weight of 4 million daltons, and a viscosity of 229,000 cP (Healon). For this substance, a good endothelium-protecting function in cataract surgery, especially phacoemulsification, is documented in the literature. In the meantime, further NaHA solutions of different concentrations and viscosities, and a mixture of chondroitin sulfate and NaHA are being offered, as well as low-viscosity solutions of hydroxypropylmethylcellulose (HPMC). The different rheological properties (viscoelasticity, viscosity, and pseudoplasticity) of the substances, the pertinent differences in surgical behavior (injectability, ease of aspiration and manipulation), and the viscoelastic side-effects (mainly IOP increase) are described.
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PMID:[Viscoelastic substances in cataract surgery. Principles and current overview]. 899 84

A retrospective study of the complications of trabeculectomy performed in the Department of Ophthalmology, Medical Faculty, Addis Ababa University between 1987-1990 is presented. Trabeculectomy was performed in 470 eyes of 354 patients during the four years period. The types of glaucomas were primary open angle glaucoma in 215 eyes (46%), primary angle closure glaucoma in 105 eyes (22%), secondary glaucoma in 117 eyes (25%) and congenital glaucoma in 33 eyes (7%). The post operative complications were shallow anterior chamber (29%), cataract (24%), hyphema (24%), uveitis (17%), choroidal detachment (4%), and conjunctival defect (3%). The post operative results show that intraocular pressure of 355 eyes (76%) were controlled with trabeculectomy alone, 17 eyes (4%) were controlled with trabeculectomy and additional medical treatment and in 98 eyes (21%), trabeculectomy with medical treatment failed to control the intraocular pressure. The overall success rate in controlling IOP was 79% and this result is similar to and comparable with results in the literature. The large exclusion (277 patients) is largely due to the fact that records could not be found.
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PMID:Trabeculectomy: complications and success in IOP control. 929 42

The aim of the study was to compare functional and refractive outcome after temporal approach phacoemulsification combined with superior trabeculectomy against that of standard superior phacotrabeculectomy in patients affected by cataract and uncontrolled glaucoma. Fifty patients undergoing combined surgery were randomly allocated to receive either a standard superior phacotrabeculectomy (group A) or a temporal via clear cornea phacoemulsification combined with a separate superior trabeculectomy (group B). Short-term and long-term mean IOP reductions were similar in the two groups though, at 2 years, more patients in the standard phacotrabeculectomy group had need of medical therapy to control their ocular pressure (p = 0.04). Group B had less surgically induced astigmatism than group A (p = 0.05). There was no significant difference in ocular inflammation and complication rates between the 2 groups.
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PMID:Temporal corneal phacoemulsification combined with separate-incision superior trabeculectomy vs standard phacotrabeculectomy. A comparative study. 958 28

We prospectively measured quantitative changes in the crystalline lens after trabeculectomy with mitomycin C. Twenty-four eyes in 24 trabeculectomy cases were consecutively enrolled in the study. The enrollment criteria consisted of: phakic eye, no history of intraocular surgeries and no corneal opacification. The transparency of the lens was measured and analyzed by EAS-1000 preoperatively, then 1 and 3 months postoperatively. Changes occurred primarily in the anterior part of the lens, especially in the anterior subcapsular region. The multivariate regression analysis demonstrated an association of cataract development with age, myopic refraction, difference in preoperative and postoperative IOP and systemic hypertension.
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PMID:An image analysis study of cataract development after trabeculectomy with mitomycin C. 967 13

This prospective study compares combined phacoemulsification and trabeculectomy (phaco-trab) to conventional phacoemulsification (phaco) in patients with coexisting cataract and open angle glaucoma. Twenty eyes were randomly assigned to either phaco-trab or phaco and followed for 12 months. Postoperatively, IOP decreased significantly in both groups, but patients with the combined procedure had fewer early IOP-elevations and significantly less medication. Visual acuity improved equally in the two groups.
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PMID:A prospective study of combined phacoemulsification-trabeculectomy versus conventional phacoemulsification in cataract patients with coexisting open angle glaucoma. 988 55

A 79-year-old female with rheumatoid arthritis suffered from severe induced iritis with dense fibrinous pupillary membrane occlusion and high intraocular pressure (57 mmHg) following cataract surgery. We used a Nd:YAG laser technique to dissect and move the dense pupillary membrane away and avoid invasive surgical procedures. Postoperatively, we recorded IOP 14 mmHg and visual acuity 20/30.
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PMID:Treatment of fibrinous pupillary membrane occlusion following cataract surgery with microruptor laser. 1021 37

Nonpenetrating deep sclerectomy is a filtration surgical technique to treat glaucoma. A 12-year-old girl presented with chronic arthritis complicated with glaucoma secondary to a chronic uveitis. A sclerectomy without a collagen implant was performed for uncontrollable glaucoma with deterioration in visual function. Three weeks later, the patient had a rise in intraocular pressure and a scleral ectasia on the sclerectomy. The eye showed an area of scleral ectasia in the bleb as well as iris adhesion. Partial resection of the bleb after iris detachment led to poor anatomic and IOP results. The indications for deep sclerectomy must be carefully considered, especially in patients at a young age with this type of glaucoma.
J Cataract Refract Surg 2000 May
PMID:Scleral ectasia as a complication of deep sclerectomy. 1083 14


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