FEATURES OF THE PERIPHERAL IRIS AS SEEN BY GONIOSCOPY AFTER CATARACT EXTRACTION.
Explore the source record for details and available documents.
SEARCH · PubMed Health
Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
The authors reviewed 3065 consecutive cases of extracapsular cataract extraction with posterior chamber lens implant (ECCE-PC IOL) and found the incidence of retinal detachment to be 1.4% overall (44/3065) and 1.7% in a group of eyes followed for at least 1 year (40/2330). Retrospective analysis of the retinal detachment (RD) group (n = 44) showed the patients to be significantly younger than the overall group (n = 3065) (P less than 0.0001). Comparison with an age-matched group of 302 eyes without RD showed higher rates of RD in males (P = 0.0013) and in eyes with axial eye length (AEL) greater than 25 mm (P less than 0.0001). No significant correlation was found between RD and PC IOL manufacturer, phacoemulsification (PKE), or primary discission. Sixty-four percent of RDs occurred within 1 year of cataract operation. Only 10% occurred more than 2 years later. Visual results in eyes with ultimate anatomic success of RD repair (43 of 44 eyes, averaging 15 months follow-up) are substantially better than previously reported in series with other types of IOLs (96% greater than or equal to 20/40 if the macula was not involved, 75% greater than or equal to 20/40 if the macula was involved).
The author presents a case with spontaneous perforation of the cornea after extracapsular cataract extraction in a female patient with rheumatoid arthritis. Systemic disorganization of the connective tissue and elevated collagenase activity essentially contribute to the pathogenesis of corneal perforation. Therefore, besides antibacterial drugs, collagenase inhibitors, 3% aqueous solution of cysteine, antimeasles gamma-globulin, and a regeneration stimulant, 5% ascorbic acid aqueous solution, were used in the treatment. The pathogenetic therapy was conducive to early healing of the corneal defect and helped save the eye and preserve its good function (0.8 s + 10.0 diopters).
Posterior capsule opacification (PCO) is the most frequent complication following extracapsular cataract extraction (ECCE). To evaluate the rate of PCO we examined 939 eyes (786 patients) following ECCE after a period of 26.3 months on the average. In 202 eyes (21.5%) cataract was associated with a clinically manifest type I or type II diabetes mellitus. The overall incidence of PCO was 28.1% (264 eyes). In patients with no other diseases (371 eyes, 100%) it was 33.4% (124 eyes). Out of 202 eyes (100%) associated with diabetes PCO was seen in 21.8% (44 eyes). This difference was statistically significant (p = 0.05). Average age and sex did not differ significantly in both groups. In diabetic patients the lens epithelial cells show accumulation of sorbitol and fructose which is proposed to contribute to cataract formation by disturbing cellular metabolism. This mechanism may explain our findings of a lower incidence of PCO possibly caused by reduced proliferation of lens epithelial cells.
Discusses the advantages of preparing the lens sac like an envelope for extracapsular cataract extraction with implantation of intraocular lens into the lens sac. Aspiration-irrigation evacuation of the lenticular mass from the equatorial zone of the lens sac is the cardinal moment in endocapsular microsurgery. The authors recommend a common glass syringe with a modified piston for evacuating the lenticular mass. The parameters of the piston groove for the tightening silicon ring pad are changed, which appreciably improves the aspiration characteristics of the syringe and permits effectively and rapidly clear the lens sac "envelope" using just 5-10 ml of irrigation solution.
Late endophthalmitis, due to Propionibacterium acnes, developed in three patients following uncomplicated extracapsular cataract extraction and posterior chamber intraocular lens (PC-IOL) insertion. Cultures from the capsular bag yielded P. acnes in all three. With topical anesthesia and through an anterior chamber paracentesis, culture specimens were taken from and clindamycin irrigated into the capsular bag. Filtered 100% oxygen was introduced into the anterior chamber in two; the third also received an injection of gentamicin and dexamethasone into the capsular bag. After treatment, two patients received oral antibiotics; one received hyperbaric oxygen therapy. Visual acuity was improved and inflammation reduced in all three. However, after treatment, ocular toxic effects due to clindamycin were suspected in one. This approach offers several clear advantages, including topical anesthesia, outpatient management, elimination of the need for vitrectomy, and retention of the intraocular lens (IOL).
Intracapsular cataract extraction with insertion of anterior chamber intraocular lens was carried out on 40 subjects. In 21 procedures, balanced salt solution or air was used to deepen the anterior chamber. In 19 procedures, Hyaluronic Acid (Healon) was used to deepen the anterior chamber. In the two groups, no significant difference was noted in the endothelial cell count or in the corneal thickness. The surgeon felt that Healon made the surgery much easier, gave better control and greatly decreased the possibility of serious complications.
Risk factors for developing an inflammatory response after extracapsular cataract extraction with implantation of posterior chamber IOL have been studied. Out of 1154 cases included in the study, an inflammatory response was encountered in 63 eyes (5.5%). The inflammatory response was defined as increased cellular flare and/or as a fibrinous reaction during a follow-up of 4 months. Thirteen of the 63 eyes (20.6%) developed cellular precipitates, and posterior synechias were seen in 34 of these eyes (54.0%). Among 10 pre- and 10 peroperative putative risk factors analyzed in a logistic regression model, 5 variables had a statistically significant influence on the probability of developing postoperative inflammation; 1) Uveitis in history (p = 0.0001), 2) Pseudo-exfoliation syndrome (p = 0.0224), 3) Inability to obtain adequate mydriasis at the start of surgery (p < 0.0001), 4) Problems with IOL implantation (p = 0.0111) and 5) Pigment effusion during surgery (p = 0.0258).
Recovery of the anterior segment following extracapsular cataract extraction and posterior chamber intraocular lens implantation in 112 diabetic eyes was compared to that in 108 eyes of nondiabetic patients who underwent a similar procedure. The incidence of postoperative anterior segment complications was significantly higher in the diabetic than in the nondiabetic patients. The main complications were pigment dispersion, appearance of fibrin, development of posterior synechiae, and--rarely, and only in diabetic patients--pupillary block and transient iridal vascular congestion. The fibrin resolved following increased administration of steroids by means of eye drops and subconjunctival injections, with or without the addition of systemic steroids. Women were found to be at greater risk for development of posterior synechiae (P less than .025). Accumulation of fibrin was seen more often in women and in patients with preexisting diabetic retinopathy than in other patients, although the difference was not significant.
A case of posterior lens capsular abscess occurring many months after an extracapsular cataract extraction is presented. This was caused by a mixed infection involving Propionibacterium acnes and Staphylococcus epidermidis. The significance of Staph epidermidis after such a long postoperative period is uncertain, but the case shows features typical of secondary endophthalmitis due to P acnes, including a long delay in onset and a grumbling course not brought under control by medical treatment. It supports the theory that the nidus of infection is localised in the posterior lens capsule by showing development of a visible capsular abscess with associated vitreous involvement. The subsequent removal of the capsule and vitreous, despite leaving the intraocular lens in place, led to complete resolution of the inflammation. Both organisms have previously been found to be sequestered in the posterior lens capsule by histological and microbiological examination of excised capsular specimens. It is important to consider them as possible causative agents in the formation of a postoperative capsular abscess.
A prospective study of preoperative risk factors in extracapsular cataract surgery was undertaken. The study included 2042 planned extracapsular cataract extractions in 1772 patients performed by 12 surgeons between February, 1986 and June, 1988. The possible risk factors to be analysed included sex, age, right or left eye, axial length, pseudoexfoliation syndrome, preceding blunt ocular trauma, diabetes mellitus and systemic hypertension. Capsular breaks occurred in 2.9% and vitreous loss in 1.9% of our patients. A significant increase in the frequency of capsular breaks was observed for patients under the age of 41 and for patients with diabetes mellitus, vitreous loss being observed significantly more frequently in eyes with pseudoexfoliation syndrome. A slight but insignificant increase in capsular breaks was observed for male patients, left eyes, eyes smaller than 22 mm, pseudoexfoliation syndrome and systemic hypertension. Advanced age, myopia and previous blunt trauma were not found to be significant risk factors for capsular breaks or vitreous loss. We recommend careful preoperative patient examination to identify preoperative risk factors and possibly avoid intraoperative complications.