Biomedical subjects

Eric A Barnes

Publications and source records attributed to Eric A Barnes.

3 recordsLinked to original sources

PubMed2005

Epiphora with eyelid laxity.

PURPOSE: To determine the efficacy of lower lid tightening procedures in the management of epiphora due to eyelid laxity. METHODS: Retrospective audit of 75 eyes in 49 patients with lid laxity and no nasolacrimal obstruction, who underwent lower lid tightening procedures for epiphora between November 2001 and June 2003. Relief from epiphora was assessed at the last clinic visit following surgery and by telephone interview in March-April 2004. RESULTS: Complete relief from epiphora persisted in 47 eyes (62.6%) as compared with 53 eyes (70.6%) at one month, and partial relief persisted in a further six eyes (8%). Eleven eyes (14.6%) with complete and five eyes (6.7%) with partial relief at discharge had recurrence of symptoms at follow-up. Mean follow-up time was 16.9 months. There was no statistically significant difference in relief between those with lateral and medial epiphora. CONCLUSIONS: Lid tightening surgery is useful in alleviating epiphora in a significant number of patients with lid laxity but the effect does not always last.

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PubMed2004

Neodymium:yttrium-aluminum-garnet capsulotomy and intraocular pressure in pseudophakic patients with glaucoma.

OBJECTIVE: To determine the 1- and 3-hour changes in intraocular pressure after neodymium:yttrium-aluminum-garnet (Nd:YAG) capsulotomy in pseudophakic patients with glaucoma and to determine the effect of acetazolamide and apraclonidine on these changes. DESIGN: Randomized controlled trial. PARTICIPANTS: Pseudophakic patients with glaucoma requiring Nd:YAG posterior capsulotomy (n = 76). INTERVENTION: Patients undergoing Nd:YAG posterior capsulotomy were randomly allocated to receive no therapy, oral acetazolamide (250 mg), or topical apraclonidine 1% within 1 hour before capsulotomy. MAIN OUTCOME MEASURES: Intraocular pressures 1 and 3 hours after laser therapy were recorded. RESULTS: Data were available for 76 eyes in 76 patients. Twenty-nine patients received no therapy; 24, oral acetazolamide; and 23, apraclonidine. One fifth (6/29) of patients with glaucoma developed a pressure rise of > or =5 mmHg if untreated, and 3% (1/29) developed a pressure rise of >10 mmHg. In comparison, no patients in the acetazolamide group developed a pressure rise of > or =5 mmHg (P = 0.02), and 1 of 24 in the apraclonidine group (P = 0.08) developed such a pressure rise, with none developing a pressure rise of >10 mmHg. When comparing all treated with nontreated, a reduction in the proportion with pressure rise was found (P = 0.01). All of the patients who developed a pressure rise of > or =5 mmHg did so within the first hour. CONCLUSIONS: In the absence of therapy, clinically significant post-Nd:YAG pressure rises occur in one fifth of patients with glaucoma undergoing capsulotomy. Oral acetazolamide and topical apraclonidine reduce the frequency and magnitude of pressure rises and are of comparable effectiveness. In this study, all clinically important pressure rises developed within the first hour.

Acetazolamide↗

PubMed2003

Pyoderma gangrenosum of the ocular adnexa: a rare condition with characteristic clinical appearances.

PURPOSE: To describe the clinical characteristics of periocular pyoderma gangrenosum and to highlight features that may encourage early diagnosis of this extremely rare condition. DESIGN: Retrospective, noncomparative, interventional case series. PARTICIPANTS AND METHODS: Four patients with periocular pyoderma gangrenosum were treated in the Orbital Unit at Moorfields Eye Hospital over the course of a decade. MAIN OUTCOME MEASURES: Presenting clinical features, therapy, and outcome. RESULTS: Four patients (female) between the ages of 56 and 75 years (mean, 65 years; median, 64 years) sought treatment for slowly evolving, painful, unilateral blue-gray swellings of the pretarsal tissues of the lower (1 case), upper (1 case), or both eyelids (2 cases). The swelling progressed to frank tissue necrosis and loss of full-thickness eyelid, with patchy sparing of the lid margin or lashes; in some cases, there was a very distinctive preservation of the pretarsal marginal artery across full-thickness eyelid defects. The lid loss characteristically involved the lateral one third of the lower eyelid (3 of 4 lids), the central part of the upper eyelid (3 of 4 lids) and, in one case, extending into the postseptal tissues in the inferotemporal quadrant of the orbit. In 3 patients, the pyoderma, often associated with a positive serum rheumatoid factor (three of three cases where measured), responded well to systemic immunosuppression and eyelid repair was undertaken during the quiescent phase. In a single patient, relapsing disease led to loss of the eye as a result of involvement of the globe and deep orbital tissues. CONCLUSIONS: Although an extremely rare condition, periocular pyoderma gangrenosum has a typical clinical appearance, and early recognition and immunosuppression will reduce the ocular morbidity.

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