
This study aimed to quantify the amount of silicone oil (SO) released across a variety of syringe and needle models routinely used for intravitreal injection. The release of SO was assessed in eight models of syringes, two of which were reported to be ‘SO‐free’, and eleven models of needles with unknown SO content. To evaluate SO release within the context of anti‐VEGF therapeutics, syringes were evaluated using aflibercept, bevacizumab, buffer, ziv‐aflibercept and formulation buffer. All syringe tests were performed with or without agitation by flicking for syringes. Needles were evaluated without agitation only. Samples were fluorescently labelled to identify SO, and triplicate measurements were collected using imaging flow cytometry...
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