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

We present a technique for in situ lens nucleus emulsification using low phaco power and high vacuum, a continuous curvilinear capsulorhexis, and hydrodelineation. Emulsification is done with the phaco tip slanted down 30 or 45 degrees. Cutting and aspiration do not cause an undesirable energy loss. This technique can be combined with the nuclear chopping or divide and conquer methods because of its ability to drill and hold the nucleus. Posterior capsular rupture is prevented because the separated epinucleus acts as a barrier between the nucleus and the cortex. The low power used minimizes the energy transfer to the corneal endothelium. This technique is particularly useful in eyes with brunescent cataract.
J Cataract Refract Surg 1997 Oct
PMID:Phacoemulsification with a bevel-down phaco tip: phaco-drill. 953 May 84

The authors evaluate the results of keratometry in a group of 235 patients after surgery of cataract who were operated by the technique of posterior limbal and scleral tunnel section by the same surgeon. Posterior limbal section induced after surgery astigmatism, on average +4.0 D in the median section, the scleral tunnel section about +2.0 D. Astigmatism after the posterior limbal section improved spontaneously during the fourth month after surgery; if it persisted, it improved after discontinuation of the suture. Slight astigmatism after the posterior limbal section developed easily after four months following operation into astigmatism against the rule. Astigmatism after a scleral tunnel section disappeared after the fourth month following operation but did not develop against the rule. Both types of sections induced after surgery similar but negligible changes of the spheral corneal equivalent.
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PMID:[Changes in corneal refraction after cataract surgery--comparison of the posterior limbic and the scleral tunnel incision]. 950 40

Posterior chamber phakic intraocular lens (PCP IOL) implantation is an emerging refractive procedure. We report a case of cataract formation 6 months after uneventful implantation of a Staar PCP IOL to correct high myopia. Visual recovery was achieved after explantation of the phakic IOL and phacoemulsification with implantation of a foldable IOL through the same unenlarged self-sealing corneal incision.
J Cataract Refract Surg 1998 Dec
PMID:Cataract formation after posterior chamber phakic intraocular lens implantation. 1019 45

Combined surgery with silicone oil removal, phacoemulsification and intraocular lens implantation was retrospectively evaluated in 9 eyes of 9 patients. Visual acuity was better after surgery in 7 eyes, and 8 eyes did not required further posterior capsulotomy during follow-up (10 months). In 2 eyes post-op intraocular inflammation was observed. Redetachment of the retina occurred in one eye. Posterior capsulorrhexis can be done during cataract surgery and silicone oil removal in a vitrectomised eye, without inducing direct complications.
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PMID:[Value of posterior capsulorrhexis during combined phacoemulsification and silicone oil removal]. 989 3

Evolution in cataract surgery developed along two fronts: technique and timing. New cannulae with very wide aspiration ports permit nucleosuction; a manual small incision method that fractionates and aspirates the nucleus. Phacoemulsification is made easier and safer with phaco sweep. Posterior capsule polishing is gentle if the only vacuum is generated by the infusion passing through the system and the aspiration tubing is not used. Fibrin glue may make long corneal incisions as stable as short ones. Several studies challenge our conventional thoughts simultaneous bilateral cataract surgery and whether patients need to be examined on the first postoperative day.
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PMID:Evolving trends in cataract surgery techniques and timing. 1016 67

Posterior-capsule opacification, by far the most common complication of primary cataract surgery, continues to stimulate important work toward understanding its causes, preventing it, and effectively treating it. Of special note here are a report by Koch and Kohnen that a combination of vitrectomy and posterior capsulorhexis is required to inhibit posterior-capsule opacification in pediatric patients; work by Nishi et al. toward the dream of replacing the cataractous lens with a flexible artificial lens, supported by the natural capsular bag; and methods by Tetz et al. and Pande et al. for precise quantification of posterior-capsule opacification.
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PMID:Capsular opacification after cataract surgery. 1038 24

The lack of sound and recent epidemiological data on the prevalence and causes of blindness has hampered the development and evaluation of the Moroccan Programme for the Prevention of Blindness. For this reason a population-based survey using a stratified (urban/rural) sampling design for random selection of clusters was carried out in the Kingdom of Morocco from May 15 until June 30, 1992. The procedures used for this survey were those proposed by the WHO Programme for the Prevention of Blindness. A total of 10,198 people were recruited and 8878 examined for a participation rate of 87%. The size and representativity of the sample satisfactorily guaranteed the order of magnitude and accuracy of eye health indicators used by health planners. The crude point prevalence of blindness was 0.8%, that of bilateral poor vision was 2.3%, and that of unilateral poor vision was estimated to be 2.8%. Based on these findings 195,000 people would be blind and 1,300,000 would be at risk of becoming so, for a total of approximately 1,500,000 people with serious visual impairment. Age-related cataract was the most important cause of blindness (45.5%) and bilateral poor vision (43.1%). The prevalence of cataract-related visual impairment--operable or inoperable--was estimated to be 2.1% of the survey sample. Applying a realistic algorithm to the survey data, it was estimated that the backlog for cataract surgery in Morocco in 1992 was in the order of 502,000 eyes in approximately 287,000 people. The percentage of patients who had undergone cataract surgery in hospital was 0.8%. Posterior lens dislocation according to the traditional "couching" method was noted in 0.1% of people studied. It was estimated that 25% of the demand for cataract surgery was covered by available facilities and that 40% of people with aphakia could not obtain eye care.
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PMID:[Cataract-related blindness in Morocco. The Moroccan Group of Epidemiologic Evaluation of Blindness]. 1090 76

Intra-ocular lens (IOL) implantation in a growing eye of a young child brings several problems unique to this age group. Better understanding of the rate of refractive growth in children's pseudophakic eyes may help predicting future refractions in these eyes more accurately. Opacification of the posterior capsule, if remained intact, interferes with visual rehabilitation in children. Primary posterior capsulectomy and anterior vitrectomy provides the clarity of visual axis. Optical rehabilitation of children with unilateral aphakia is usually problematic. Posterior chamber IOLs are preferred to anterior-chamber IOLs for secondary implantation. In the absence of adequate capsular support and contact lens intolerance, a scleral-fixated IOL can be implanted. Scleral fixation of a posterior chamber IOL has encouraging short-term results but the long-term risks are not known yet. Intra-ocular lens implantation in infants is associated with major complications and is not recommended at present. The occurrence of open angle glaucoma is a sight-threatening late complication of pediatric cataract surgery. Intra-ocular lens implantation plays a protective role against aphakic glaucoma in children.
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PMID:Intra-ocular lens implantation in children. 1115 78

Posterior dislocation is a well-described complication of plate-haptic intraocular lenses (IOLs). It usually occurs after an opening in the posterior capsule, either intraoperatively or after a neodymium: YAG capsulotomy occurs. We report a case of anterior luxation of a plate-haptic silicone IOL occurring 4 months after uneventful cataract surgery. This case emphasizes the need for a small and continuous capsulorhexis as well as in-the-bag implantation of plate-haptic IOLs.
J Cataract Refract Surg 2001 Jan
PMID:Dislocation of a plate-haptic silicone intraocular lens into the anterior chamber. 1116 66

Many patients require surgery for cataract after retinal surgery. When evaluating patients preoperatively, the surgeon should pay careful attention to the assessment of visual function and potential acuity, and to the slit lamp examination of the lens, posterior capsule, anterior cortical vitreous, and zonules. The surgeon's technique must account for increased nuclear sclerosis, intraoperative miosis, a characteristically longer axial length, and fluctuations in anterior chamber depth from movement of the iris-lens diaphragm. Posterior capsule plaques are not unusual. Posterior capsule opacification is the most frequent late complication. Visual outcomes are usually good except when limited by pre-existing macular pathology. Vision-threatening complications of cataract surgery are unusual.
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PMID:Cataract surgery after retinal surgery. 1138 46


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