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Punctal Occlusion

• Punctum and intra-canalicular occlusion are appropriate for certain patients with aqueous abnormalities, and it is important that a correct diagnosis is made to allow selection of suitable patients for the procedure.

 

Collagen plugs

• These are "temporary" ; that is they dissolve over 4 to 7 days. This allows them to be  useful for diagnostic and prognostic purposes. In other words, they may be used to predict the likelihood of benefit.
• Plugs are available in a range of diameters (0.2mm, 0.3mm, 0.4mm, 0.5mm, and 0.6mm) and lengths (a "standard" 2mm and a shorter 1.6 mm).

Silicone plugs

• These are "permanent" in that they do not dissolve. However they can be removed if necessary. There are two main categories of silicone plug for dry eye:

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