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Dive into the research topics where Tony S. Chen is active.

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Featured researches published by Tony S. Chen.


Ophthalmic Plastic and Reconstructive Surgery | 2014

Successful "medical" orbital decompression with adjunctive rituximab for severe visual loss in IgG4-related orbital inflammatory disease with orbital myositis.

Tony S. Chen; Edwin C. Figueira; Oliver C.F. Lau; Penny McKelvie; Robert I. Smee; Laughlin C. Dawes; Ashish Agar; Geoff Wilcsek; Ian C. Francis

IgG4-related disease (IgG4-RD) is an inflam matory condition of unknown etiology that can cause tumefactive lesions in a number of tissues and organs, including the orbit and ocular adnexa. Diagnostic criteria for IgG4-RD, including pathology and clinical features and pathology, have been recently proposed.1 This study presents the first case of unilateral acute visual loss secondary to IgG4-related orbital inflammatory disease with orbital myositis that was complicated by severe compressive optic neuropathy. After initial treatment with pulsed intravenous methylprednisolone, followed by rituximab and radiotherapy, there was a marked improvement in orbital inflammation and clinical and radiological improvement in the compressive optic neuropathy. After 9 months of follow up, the orbital inflammatory disease remained in remission.


Journal of Cataract and Refractive Surgery | 2014

Acute intraoperative rock-hard eye syndrome and its management

Oliver C.F. Lau; Jessica M. Montfort; Benjamin W.C. Sim; Chris H.L. Lim; Tony S. Chen; Claire W. Ruan; Ashish Agar; Ian C. Francis

Purpose To evaluate the use of pars plana needle aspiration of retrolenticular fluid in the immediate management of an acute intraoperative rock‐hard eye syndrome (AIRES). Setting Private practice, Sydney, Australia. Design Retrospective case series. Methods Data over an 18‐month period were collected to evaluate efficacy, complications, and visual outcomes in patients who had pars plana needle aspiration for management of AIRES, which is an acute intraoperative shallowing of the anterior chamber and a marked increase in intraocular pressure (IOP) during phacoemulsification cataract surgery but without evidence of a choroidal hemorrhage. Preoperative and postoperative (1 day, 1 week, and 1 month) data were evaluated. Resolution of AIRES and postoperative posterior segment status, IOP, and corrected distance visual acuity (CDVA) were the main outcome measures. Results Acute intraoperative rock‐hard eye syndrome occurred in 6 (1.45%) of 413 surgeries. All 6 patients were women with a mean age of 81 years. Four patients had dense nuclear cataracts. In each case, the anterior chamber depth and IOP normalized immediately after pars plana needle aspiration and the procedure concluded uneventfully. Mild vitreous hemorrhage was observed in 1 patient postoperatively. At 1 month, the IOP was normal in 5 of 6 cases, while the CDVA was 20/12 in 5 of 6 cases. Conclusion Although the etiology of AIRES is iatrogenic, immediate resolution was achieved uneventfully with pars plana needle aspiration, which appears to be a safe management technique with satisfactory outcomes. Financial Disclosure No author has a financial or proprietary interest in any material or method mentioned.


Heart Lung and Circulation | 2014

The demographic profile of young patients (<45 years-old) with acute coronary syndromes in Queensland.

Tony S. Chen; A. Incani; Thomas Butler; K. Poon; J. Fu; M. Savage; M. Dahl; Donna E. Callow; Daniel Colburn; C. Hammett; D. Walters

BACKGROUND There is little data regarding the demographic profile of young (<45 years) Australian acute coronary syndrome patients. The aim of this study was to compare baseline characteristics, risk factor profile and outcomes of young patients compared with their older counterparts referred to two metropolitan Queensland hospitals. METHODS Over a four-year period, data on acute coronary syndrome patients referred to The Prince Charles and Royal Brisbane Hospitals were retrospectively analysed. Three major groups were identified: <45 years, 45-60 years and those >60 years. Age, sex, body mass index, risk factor profile, degree of coronary disease, left ventricular dysfunction, mode of presentation, initial pharmacological therapy and mortality data were compared between the three groups. RESULTS 4549 patients were analysed of whom, 277 were less than 45 years old. Younger patients tended to be male, more overweight and present more commonly with ST segment elevation myocardial infarction compared to their older counterparts. Smoking, family history and dyslipidaemia tended to occur more frequently in younger patients as compared to those >45 years. Those patients >45 years tended to present with non-ST segment elevation myocardial infarction and have a higher degree of ischaemic burden and left ventricular dysfunction. No patients <45 years died in their index admission at 30 days or at one year. CONCLUSIONS Although young patients <45 years make up the minority (6.1%) of patients presenting with acute coronary syndrome and generally have a favourable prognosis, this paper highlights the need for aggressive risk factor modification, with particular attention to smoking and dyslipidaemia, before the onset of overt clinical disease.


Clinical and Experimental Ophthalmology | 2016

Materials in the vitreous during cataract surgery: nature and incidence, with two cases of histological confirmation.

Andrew W. Kam; Tony S. Chen; Sarah B. Wang; Neeranjali S. Jain; Aaron Yj Goh; Christopher P Douglas; Penny McKelvie; Ashish Agar; Robert H Osher; Ian C. Francis

To identify and classify materials in the vitreous observed during phacoemulsification cataract surgery (phaco).


Ophthalmic Plastic and Reconstructive Surgery | 2014

LESCs: Lateralizing Eyelid Sleep Compression Study.

Edwin C. Figueira; Tony S. Chen; Ashish Agar; Minas T. Coroneo; Geoffrey A. Wilcsek; Arie Y. Nemet; Ian C. Francis

Purpose: To study the hypothesis that in normal patients, changes in eyelid elasticity may occur asymmetrically and in relation to the side on which the individual sleeps. Design: Prospective, consecutive, single-center study within a large, tertiary-referral ophthalmology department within a university hospital. Methods: This prospective study was carried out consecutively on 262 normal patients. The 3 inclusion criteria were 1) age ≥55 years, 2) absence of facial nerve palsy, and 3) absence of eyelid trauma or surgery. Immediately before the ocular plastic surgeon assessed the patient, each patient was questioned in a separate consulting room by the attending orthoptist as to his or her customary side of sleeping. After detailed explanation, the “history-masked” ocular plastic surgeon then assessed the patient’s upper eyelid laxity, the main outcome measurement. This was performed by asking the seated patient to look down and then gently grasping the upper eyelids close to the eyelid margin, just medial to the lateral commissure. The ocular plastic surgeon, with thumbs pronated, simultaneously distracted both upper eyelids superiorly, laterally, and anteriorly. The measured separation of the upper eyelid from the globe conjunctiva was obtained using calipers. Eyelid laxity grading was designated as grade 1: 0 to 1.9 mm; grade 2: 2.0 to 3.9 mm; grade 3: 4 to 9 mm; and grade 4: floppy. Results: Two hundred sixty-two patients (58% females) who consecutively satisfied the selection criteria were evaluated, of which 70.22% (183/262) patients had significantly greater laxity of the upper eyelid that corresponded to the side on which they customarily slept. An unpaired t test used to compare the eyelid laxity between the sleeping side and nonsleeping side was statistically significant (p < 0.001). Conclusion: Normal patients demonstrate a correlation between the side on which they historically or customarily sleep and the laxity of their ipsilateral upper eyelid.


Clinical and Experimental Ophthalmology | 2017

Materials in the vitreous demonstrated under the operating microscope during cataract surgery and confirmed histologically

Andrew W. Kam; Tony S. Chen; Sarah B. Wang; Neeranjali S. Jain; Aaron Yj Goh; Christopher P Douglas; Penny McKelvie; Ashish Agar; Robert H Osher; Ian C. Francis

1. Kam AW, Chen TS, Wang SB, et al. Materials in the vitreous during cataract surgery: nature and incidence, with two cases of histological confirmation. Clin Experiment Ophthalmol 2016; 44: 797–802. 2. Grzybowski A, Prasad S. Acute aqueous misdirection syndrome: pathophysiology and management. J Cataract Refract Surg 2014; 40: 2167. 3. Mackool RJ, Sirota M. Infusion misdirection syndrome. J Cataract Refract Surg 1993; 19: 671–2; erratum, 819. 4. Olson RJ, Younger KM, Crandall AS, Mamalis N. Subcapsular fluid entrapment in extracapsular cataract surgery. Ophthalmic Surg 1994; 25: 688–9. 5. Little BC, Hitchings RA. Pseudophakic malignant glaucoma: Nd:YAG capsulotomy as a primary treatment. Eye 1993; 7: 102–4.


Journal of Cataract and Refractive Surgery | 2013

Endophthalmitis in Cape Town, South Africa: Are the data real?

Michael G. Zhang; Tony S. Chen; Oliver C.F. Lau; Zachary McPherson; Andrew K. Kam; Claire W. Ruan; Katherine E. Francis; Ashish Agar; Ian C. Francis; Benjamin W.C. Sim


Ophthalmology | 2015

Re: Rudnisky et al.: Antibiotic choice for the prophylaxis of post-cataract extraction endophthalmitis (Ophthalmology 2014;121:835-41)

Tony S. Chen; Calum W. K. Chong; Andrew W. Kam; Farshad Abedi; Ian C. Francis


Heart Lung and Circulation | 2012

A Comparison of the Mode of Presentation of Three Cohorts of ACS Patients ( 60 years) in Queensland

A. Incani; Thomas Butler; Tony S. Chen; K. Poon; M. Savage; M. Dahl; J. Fu; H. Muller; D. Colburn; K. Renkin; D. Callow; C. Hammett; D. Walters


Heart Lung and Circulation | 2012

A Comparison of the Risk Factor Profile of Three Cohorts of ACS Patients ( 60 years) in Queensland

A. Incani; Thomas Butler; Tony S. Chen; M. Savage; M. Dahl; J. Fu; H. Muller; D. Colburn; K. Renkin; D. Callow; C. Hammett; D. Walters

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Ian C. Francis

University of New South Wales

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Ashish Agar

University of New South Wales

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A. Incani

University of Queensland

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C. Hammett

Royal Brisbane and Women's Hospital

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D. Walters

University of Queensland

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Andrew W. Kam

University of New South Wales

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H. Muller

Royal Brisbane and Women's Hospital

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K. Poon

University of Queensland

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Oliver C.F. Lau

University of New South Wales

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Thomas Butler

University of Queensland

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