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The VEGF treatment of AMD switch study (The vTAS study)


Curry, B and Bylsma, G and Hewitt, AW and Verma, N, The VEGF treatment of AMD switch study (The vTAS study), Asia-Pacific Journal of Ophthalmology, 6, (6) pp. 481-487. ISSN 0129-1653 (2017) [Refereed Article]

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2017 Asia-Pacific Academy of Ophthalmology. Unauthorized reproduction of this article is prohibited.

DOI: doi:10.22608/APO.2017364


Purpose: To evaluate the effect of aflibercept on anatomic and visual outcomes in patients with choroidal neovascularization (CNV) previously treated with intravitreal ranibizumab with persistent fluid on optical coherence tomography (OCT).

Design: Prospective, open-label study.

Methods: Eighteen patients (19 eyes) with CNV being treated with monthly ranibizumab, with persistent fluid on OCT, were switched to intravitreal aflibercept injections at intervals of up to 8 weeks. The primary outcome was the proportion of patients maintaining vision [<5 letter loss in visual acuity (VA)] at week 48. Secondary outcomes included the change in VA and central macular thickness (CMT) and the frequency of treatment necessary along with the safety of intravitreal aflibercept.

Results: Forty-eight weeks after switching to aflibercept, 16/19 eyes had maintained VA. There was a median increase in vision of 5 letters [interquartile range (IQR): 0, 15; P = 0.06)] and median CMT was reduced from 313 m (IQR: 214, 334) to 258 m (IQR: 200, 299; P = 0.02). After stratification by fluid location the reduction in CMT was statistically significant for eyes with intraretinal fluid (IRF) at baseline [median change, -25 m (IQR: -14, -64); P = 0.01]. Macular volume within 6 mm of the fovea (CMTVol) was significantly reduced in eyes with subretinal fluid (SRF) [-0.20 mm (IQR: -1.45, -0.05); P = 0.03].

Conclusions: In this small cohort of eyes, switching to aflibercept seemed beneficial. The majority maintained or improved vision and eyes with IRF or SRF had significant reductions in macular edema. However, visual improvement was not always indicative of anatomical improvement.

Item Details

Item Type:Refereed Article
Keywords:aflibercept, neovascular age-related macular degeneration, ranibizumab
Research Division:Biomedical and Clinical Sciences
Research Group:Ophthalmology and optometry
Research Field:Ophthalmology
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Hewitt, AW (Professor Alex Hewitt)
UTAS Author:Verma, N (Dr Nitin Verma)
ID Code:126257
Year Published:2017
Web of Science® Times Cited:3
Deposited By:Menzies Institute for Medical Research
Deposited On:2018-05-31
Last Modified:2022-08-29

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