Showing papers on "Cataract surgery published in 1969"

Polyvinyl pyrrolidone (PVP) in cataract surgery.

Abstract: Early reformation of the anterior chamber after intraocular surgery is of paramount importance, its absence or delay leading to peripheral anterior synechiae and aphakic glaucoma (Troncoso, 1933; Kronfeld and Grossman, 1941; McLean, I94I; Meyer and Sternberg, 1950). Selinger (1937) injected air after cataract operations to restore the normal curvature of the cornea. He concluded that air prevented blockage of the chamber angle by pressing on the iris hyaloid diaphragm and thus avoiding such postoperative complications as iris prolapse and secondary glaucoma. Barkan (195I) found that the intraocular pressure might rise after the injection of air, as air under pressure produced seclusion of the pupil. Lister (1957), in a case of irregular anterior chamber, withdrew air and introduced saline in its place with good results. Lytton (I963), while advocating the use of air, warned that the small air bubble might enter the posterior chamber and press the iris against the angle of the anterior chamber. Chacon Mendoza (I963) objected that air, being a foreign material, might lead to irritation and iris prolapse; he recommended the use of the patient's own aqueous, which could be removed before surgery and injected postoperatively. King and McTigue (I964) used polyvinyl pyrrolidone (PVP) in the anterior chamber after keratoplasty and glaucoma operations for the treatment of bullous keratopathy. In their own words: "Our use of PVP to replace aqueous after grafting and glaucoma was incidental. We had begun to use this method after Payran's trial, with the thought that it could be a treatment for bullous keratopathy". PVP, a synthetic polymer of vinylpyrrolidone (Figure), is a glistening white flaky substance, soluble in water, giving a clear to yellow viscous solution with pH 4-5 to 7-0. It is freely soluble in most organic substances and also in saline. Aqueous solutions are stable and can be sterilized by autoclaving.

Corneal approach 20 Guage vitrectomy system for the management of congenital cataract.

Abstract: OBJECTIVE To evaluate the efficacy and complications of 20 gauge vitrectomy via corneal approach for the management of congenital cataract. METHOD We performed anterior capsular vitreorhexis, lens matter aspiration (LMA), primary posterior vitrectorhexis and anterior vitrectomy via corneal approach using 20 gauge vitrectomy system in children younger than two years of age with congenital cataract between January 2014 to December 2014. The intra and postoperative complications were observed. RESULTS Twenty nine eyes of 21 children were included in this study. Congenital cataract surgery using 20 gauge vitrectomy system via corneal approach did not reveal any intra operative complication. Post operatively all children were able to freely open their operated eyes. Conjunctival congestion at the incision site in four eyes and mild anterior chamber reaction in 8 eyes were seen on 1(st) daywhich resolved at one week follow up. Other major post operative complications such as inflammatory membrane, irregular pupil, posterior/anterior syneache and opacification of visual axis were not seen during follow up period. CONCLUSION The 20-gauge vitrectomy system via corneal approach is easy to perform, is less time consuming, safe and effective for the management of congenital cataract in younger children.