Alterations in blood-aqueous barrier after corneal refractive surgery

Show simple item record

dc.contributor.author Vita, RCA
dc.contributor.author Campos, M.
dc.contributor.author Belfort, R.
dc.contributor.author Paiva, E. R.
dc.date.accessioned 2016-01-24T12:30:33Z
dc.date.available 2016-01-24T12:30:33Z
dc.date.issued 1998-03-01
dc.identifier http://dx.doi.org/10.1097/00003226-199803000-00007
dc.identifier.citation Cornea. Philadelphia: Lippincott Williams & Wilkins, v. 17, n. 2, p. 158-162, 1998.
dc.identifier.issn 0277-3740
dc.identifier.uri http://repositorio.unifesp.br/handle/11600/25878
dc.description.abstract Purpose. To assess alterations in the blood-aqueous barrier after radial keratotomy (RK), photorefractive keratectomy (PRK), laser in situ keratomileusis (LASIK), and phototherapeutic keratectomy (PTK). Methods. Aqueous flare was evaluated using the Kowa FM 500 laser flare meter in a total of 87 eyes from 82 patients who underwent refractive surgery. Measurements were obtained preoperatively in 51 eyes of 51 patients who underwent RK or PRK and again at the end of surgery, and at 1 day and 1 week postoperatively. These patients had been randomized (double masked) to receive topical 0.1% dexamethasone, polymyxin B (6,000 U/ml), and 0.5% neomycin 4 times a day for 1 week after surgery, or polymyxin B (6,000 U/ml) and 0.5% neomycin for 1 week. Aqueous flare measurements were also obtained before surgery in 36 eyes (31 patients) that underwent LASIK and again at 1 day and 1 and 2 weeks postoperatively. All patients in this group received topical 0.1% dexamethasone, polymyxin B (6,000 U/ml), and 0.5% Neomycin 4 times a day for 15 days after surgery. Results. Uneventful RK induced a significant increase in flare immediately after surgery, although this did return to baseline 1 day after surgery (Friedman test). Measurements at 7 days after surgery were similar in steroid-treated and untreated groups. Limbal bleeding, which occurred in 23% (12/51) eyes, did not induce significantly increased flare as compared to uneventful RK. Microperforations, which occurred in 18% (9/51) eyes, did induce significant alterations in the blood-aqueous barrier that persisted for >1 day, but measurements returned to preoperative levels by day 7. PRK and LASIK induced substantially increased flare in some eyes. Phototherapeutic keratectomy, in particular, induced an elevation in flare measurements that did not return to normal levels even by 15 days after surgery (Friedman test). Conclusions. Using mean results of laser flare meter evaluation, uneventful RK appears to induce short-lasting elevations in aqueous flare in both steroid-treated and untreated patients. Microperforation induced prominent alterations in flare measurements, although limbal bleeding did not. Both PRK and LASIK did appear to increase flare measurements in some eyes, while PTK induced significant elevations in aqueous flare in the majority of eyes. en
dc.format.extent 158-162
dc.language.iso eng
dc.publisher Lippincott Williams & Wilkins
dc.relation.ispartof Cornea
dc.rights Acesso restrito
dc.subject inflammation en
dc.subject excimer laser en
dc.subject laser flare meter en
dc.subject cornea en
dc.title Alterations in blood-aqueous barrier after corneal refractive surgery en
dc.type Artigo
dc.contributor.institution Universidade Federal de São Paulo (UNIFESP)
dc.description.affiliation Universidade Federal de São Paulo, Paulista Sch Med, Dept Ophthalmol, BR-04023062 São Paulo, Brazil
dc.description.affiliationUnifesp Universidade Federal de São Paulo, Paulista Sch Med, Dept Ophthalmol, BR-04023062 São Paulo, Brazil
dc.identifier.doi 10.1097/00003226-199803000-00007
dc.description.source Web of Science
dc.identifier.wos WOS:000072264400007



File

File Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search


Browse

Statistics

My Account