Laser Peripheral Iridotomy (LPI)
What is a Laser Peripheral Iridotomy (LPI)?
LPI is a brief, in-office laser procedure used to create a small opening in the coloured part of your eye, called the iris.
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Why is LPI Recommended?
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Your doctor has recommended LPI to:
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Prevent angle-closure glaucoma: In some eyes, the iris can block the flow of fluid within the eye, leading to a sudden increase in eye pressure. LPI creates a new pathway for this fluid to drain.
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Treat angle-closure glaucoma: If you have already experienced angle-closure, LPI can help to lower the pressure in your eye.
What to Expect
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Before the procedure:
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​There are no special preparations for your LPI treatment, simply arrive at the office at yourscheduled appointment time.
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Drops to constrict your pupils may be instilled into your eye(s) upon arrival for your appointment. This makes it easier for the laser to create an opening in the iris.
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Anesthetic drops will be instilled in your eye(s) immediately before the procedure to numb the eye.
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During the procedure:
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You will sit comfortably.
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A lens will be placed on your eye to reduce movements like blinking.
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The surgeon will then perform the procedure. The LPI treatment is quickly completed. Some patients report mild discomfort during treatment.
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After the procedure:​
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You may resume your normal daily activities after receiving LPI treatment.
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You may feel a slight headache after undergoing LPI treatment. This will pass within a couple
of hours. -
The eye may feel irritated, have redness, and suffer from blurry vision for the first few days after
the LPI treatment. -
You will be prescribed steroid drops after the procedure to alleviate any soreness and prevent
any inflammation. Please ensure that you pick up and use these drops. -
You will be scheduled for a 4-6 week follow-up with your surgeon after the treatment to
measure your eye pressure.
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Benefits of LPI:
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Can prevent a sudden and potentially blinding form of glaucoma.
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Can lower eye pressure in eyes with angle-closure.
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Is a minimally invasive procedure with a quick recovery.
Risks of LPI:
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LPI is generally a safe procedure, but like any medical treatment, it has potential risks, including:
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Temporary blurry vision or discomfort.
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Inflammation in the eye.
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Bleeding in the eye (rare).
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Increase in eye pressure (temporary or persistent).
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Damage to the cornea (the front surface of the eye) (rare).
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Double vision (rare).
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The need for further treatment, including more surgery.
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Important Notes​
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You will need someone to drive you home, as your vision may be blurry after the procedure.
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Follow your doctor's instructions for any eye drops.
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Contact your doctor if you have:
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Severe pain.
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Sudden vision loss.
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Increased floaters or flashing lights.​
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