All surgery carries the risk of infection and pain, but with iStent Inject those risks are low. There could be inflammation of the eye and swelling, but these effects fade.
As with any eye operation, there is the possibility of reduced vision as a result. This is not desired, of course, but uncontrolled glaucoma can lead to reduction in vision. The decision to use the iStent is always a balance of risk versus benefit for the individual patient.
As a mechanical device it is possible that the iStent will become blocked over time. It is possible to remedy this problem.
The iStent is made of titanium. This is inert with respect to the human body and does not cause allergic effects. It is sufficiently small that it is not a problem for any future MRI or other scans. Also, titanium does not set off airport or other security scanners.
iStent Inject for glaucoma should not change your glasses prescription. If significant change does occur this should be reported back this will be treated by your surgeon. It is usually possible to resume the use of contact lenses within a month of the procedure.
In very few cases, further treatment can be necessary as a result of iStent – for example, if the eye pressure falls too low. It is very important to keep follow-up appointments for this reason.