Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0086543 (cataract)
 29,165 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Hypotony after fistulizing surgery is common, and most cases resolve without complications. Occasionally, a flat anterior chamber in phakic or pseudophakic eyes may lead to corneal decompensation or cataract formation. In aphakic eyes that have undergone previous vitreous surgery, flat anterior chambers will not develop, but large choroidal detachments and delayed suprachoroidal hemorrhage may occur while the eye is soft. To maintain intraocular pressure (IOP) in the early postoperative period, the authors used a technique to seal the drainage tube with a Vicryl tie, combined with injection of sodium hyaluronate, sulfur hexafluoride (SF6), or perfluoropropane (C3F8), perioperatively in 28 eyes undergoing glaucoma tube implant surgery. Eight eyes were treated with injection of sodium hyaluronate, 8 with SF6, and 12 eyes with C3F8. Hypotony was significantly less frequent in eyes treated with C3F8 compared with sodium hyaluronate (P less than 0.05). Mean IOP was significantly higher for eyes treated with C3F8 injection compared with sodium hyaluronate for the first 4 days after surgery (P less than 0.05).
 ...
PMID:Injection of perfluoropropane gas to prevent hypotony in eyes undergoing tube implant surgery. 238 4

The treatment of the infant who is born with sensory deprivation amblyopia is one of the most difficult therapeutic problem sets facing the ophthalmologist today. This group of anomalies has many forms, the most common of which seems to be unilateral and bilateral cataracts. Substantial advances have been made, however, in many aspects of therapy for infants who have this set of problems. We have come to realize that it is essential to address these conditions at the first moment that is consistent with the safety of the child. New techniques in cataract extraction have reduced the time course of surgical treatment, reduced the frequency of secondary cataracts, and sustained the patency of the visual pathway. Unfortunately, practitioners who engage in the surgery may not have the back-up skills in advanced contact lens fitting, correction of aniseikonia, and, in some instances, the strabismological complications which are encountered. Further, improved means of assessment of visual acuity, binocular vision, and other visual characteristics of these infants are only in the developmental stages at this time. Thus, we propose to present the problem in an orderly manner. We shall first review the types of cases and problems. We will then discuss surgical techniques and the information which must be determined during examination under anesthesia (EUA) for the purposes of visual correction. We will then describe the designs of the spectacle lens and/or spectacle/contact lens combinations that are used to correct the resultant aniseikonia and anisometropia. We will address the approaches to patching and techniques on how to best achieve binocular vision in these patients. Separately, means and methods of assessment of vision by preferential looking, visual evoked response, optokinetic nystagmus, and tests of other visual functions will be explored. In summary, we will try to tie together the entire therapeutic regimen that can be used in the treatment of these patients.
 ...
PMID:Helping the aphakic neonate to see. 408 71

This study describes the intraoperative and postoperative performance of coated and uncoated Polyglactin 910 in cataract and muscle surgery. The evaluation represents an animal and clinical comparison of 5-0 coated and uncoated Polyglactin 910 in 50 muscle cases and 7-0 coated and uncoated Polyglactin 910 in 150 cataract cases. Both Polyglactin 910 sutures provided high tensile strength, good knot security, batch-to-batch uniformity, ease of handling, minimal reaction, and a predictable absorption rate. Improvements noted in the coated suture were: (1) easier passage through tissue, (2) less chatter in tying, (3) fewer instances of premature tie, and (4) decreased tendency to incarcerate tissue.
 ...
PMID:Comparative evaluation of coated and uncoated polyglactin 910 in cataract and muscle surgery. 700 99

A new system to correct symmetric bow-tie myopic astigmatism with the excimer laser using oval apertures for toric ablations is described. Initial results in two patients who had -5.0 and -5.5 diopters of astigmatism after surgery with six-months follow-up showed a reduction of up to 85% with a minimal axial error of two degrees.
J Cataract Refract Surg 1995 May
PMID:Correcting myopic astigmatism with an areal 193 nm excimer laser ablation. 767 62

We studied the corneal curvature of 161 eyes in 101 patients, aged from 50 to 80 years (mean: 63 years), with senile cataract using the Topographic Modeling System (TMS) preoperatively. The results revealed that mean surface asymmetry index (SAI) was 0.36 and mean surface regularity index (SRI) 0.79. Simulated keratometry reading (Sim K) was 44.46 D, and 43.56 D. Minimum K reading was 42.60 D. The same patterns of corneal topography in both eyes were 50% in 60 patients who had binocular examination. Astigmatism less than 1 D was 23% in 161 corneas. Corneal patterns included round (21.2%), oval 16.1%), symmetric and asymmetric bow-tie (22.2%), and irregular (40.4%). SRI and SAI of the irregular pattern were statistically higher than those of the round, oval and bow-tie patterns in our patients (P < 0.01 and P < 0.05). The results of our study determined that the cornea of eye with senile cataract preoperatively is not a perfect spherocylinder. It is asymmetrically aspheric, with less curvature peripherally than centrally.
 ...
PMID:Corneal topographic analysis in patients with cataract. 774 3

We modified the closure of the scleral flap in trabeculectomy by using an externalized hemibow tie, easily removable in the early postoperative period. We used this externalized knot in 20 eyes of 17 patients undergoing trabeculectomy and in eight eyes of seven patients undergoing combined trabeculectomy and cataract extraction with intraocular lens implantation. The sutures were removed between 2 and 72 days after surgery (16.75 +/- 14.49 days). With a mean follow up of 11.36 months, the overall success rate was 78.6%. The sutures of nine eyes (32%) were removed due to elevated intraocular pressure and/or decreased bleb size. The immediate and long-term efficacies were 77% and 56%, respectively. The trabeculectomies we performed using this safe and simple technique, as compared with those using other methods of scleral flap closure, provided a lower incidence of postoperative complications due to overfiltration, and made it possible to increase the degree of filtration when needed during the early postoperative period.
 ...
PMID:A modified removable suture in trabeculectomy. 823 29

Using the Topographic Modeling System (TMS), we studied the early changes in anterior corneal curvature following cataract surgery. Thirty patients who had planned extracapsular cataract extraction (p-ECCE) or phacoemulsification were evaluated with TMS at three days, and one, two, three, and five weeks postoperatively. After p-ECCE, the upper part of the cornea which corresponded to the wound and the lower cornea markedly steepened and showed a bow-tie pattern of astigmatism. Eight (57%) of 14 cases showed little reduction in the corneal steepening at five weeks postoperatively. In five cases (36%) the steepening in the lower cornea was less than the minimal change in the upper cornea. After phacoemulsification, corneal steepening was much less than it was after p-ECCE; three cases (17%) showed almost no surgically induced alteration of the cornea. In eight phacoemulsification cases (61%), postoperative corneal steepening decreased rapidly and the corneal shape recovered within five weeks. Our topographic analysis clearly demonstrated that a smaller wound in phacoemulsification surgery produced less corneal steepening and stabilized more rapidly than a larger wound in p-ECCE.
J Cataract Refract Surg 1993 Jan
PMID:Topographic analysis of early changes in corneal astigmatism after cataract surgery. 842 21

We screened family members of monozygotic twins with keratoconus to search for a corneal thinning disorder using clinical, videokeratographic, and pachymetric analyses. The parents had bilateral astigmatism of a symmetric bow-tie pattern with normal videokeratographic and pachymetric indices. The 8-year-old sister had slightly asymmetric astigmatism in both eyes with normal pachymetry values. No family member was suspected of a corneal thinning disorder. We discuss the mode of inheritance of keratoconus in this family.
J Cataract Refract Surg 2000 Dec
PMID:Keratographic analysis of a family with keratoconus in identical twins. 1113 87

A 27-year-old man had excimer photoastigmatic keratectomy in the right eye and laser in situ keratomileusis in the left eye for the treatment of equivalent myopia. Preoperative slitlamp examination did not reveal evidence of keratoconus, central corneal pachymetry was 485 microm in the right eye and 500 microm in the left eye, and corneal topography revealed asymmetric bow-tie astigmatism with inferior steepening in the right eye and a small area of inferior steepening in the left eye. Twenty-two months after surgery, the patient complained of poor vision in the left eye. Slitlamp examination of the left eye revealed central corneal thinning and protrusion, with a Fleischer ring within the flap. Corneal topographic evaluation revealed a stable map in the right eye and central corneal steepening indicative of keratectasia in the left eye.
J Cataract Refract Surg 2004 Dec
PMID:Photorefractive keratectomy versus laser in situ keratomileusis to prevent keratectasia after corneal ablation. 1561 36

We present a case of unilateral acute hydrops that developed in 25-year-old man 6 years after bilateral laser in situ keratomileusis (LASIK) for the correction of 2.75 diopters (D) of myopia. Preoperative corneal thickness using ultrasound pachymetry were 556 microm in the right eye and 554 microm in the left eye. Preoperative corneal topography of both eyes showed an asymmetric bow-tie pattern with inferior steepening. Forty-seven months after LASIK, the left eye developed astigmatism and enhancement excimer ablation was performed. Sixteen months after enhancement, a definite sign of keratectasia was detected in the left eye. Twenty-six months after enhancement, acute hydrops occurred in the left eye. The interface of the LASIK wound was separated and filled with aqueous humor. Penetrating keratoplasty was performed to avoid perforation. The keratocytes at the edge between the peripheral flap and remaining stroma showed mixoid degeneration and edematous change suggesting dying cells.
J Cataract Refract Surg 2005 Jun
PMID:Clinical manifestation and pathologic finding of unilateral acute hydrops after bilateral laser in situ keratomileusis. 1603 6


1 2 Next >>