The doctor will put a special contact lens on your eye before applying the laser beam. However, there is a special laser attached to this machine. You will then sit at a machine similar to the machine used to examine your eyes at the eye clinic. These are usually a miotic (drops to make your pupil smaller), a drop to lower the intraocular pressure (the pressure inside your eye due to aqueous) as well as an anaesthetic eye drop to numb your eye. You will then have some more drops put into your eye. You don’t need to do any special preparations such as fasting or changing into operating theatre clothes. We will carry out the treatment in one of our laser treatment rooms. You will need to visit the outpatient clinic for about 1-2 hours. On the day, please take your eye medication as normal on the morning of the laser treatment. What can patients expect on the day of the procedure? Is laser iridotomy the same as YAG iridotomy and peripheral iridotomy? Without having this treatment, you are at risk of developing sudden glaucoma and irreversible blindness. The laser treatment is to prevent a sudden (acute) rise in pressure within your eye. It will not restore any sight you may have already lost, neither will it improve your sight. It is important to remember that this procedure is performed to save the sight you still have. Aqueous humour is a completely different fluid to your tears and they will not be affected by the operation. This forms a permanent passage, of which aqueous humour can flow through, and pushes the iris tissue backwards, thus unblocking the drainage channels. The build-up of pressure injures your optic nerve - the nerve that carries information from your eye to your brain - and damages your vision.Ī laser iridotomy uses a laser beam to create a small hole in your iris. Because of this, the aqueous humour cannot leave your eye, so your eye pressure increases (also known as intraocular pressure). However, if you have angle-closure, these drainage channels are obstructed by the iris (the coloured part of your eye) which has moved forward. If you have healthy eyes, the fluid in your eye (aqueous humour) flows through your pupil into the front of your eye and drains away through drainage channels called the trabecular meshwork. Learn from Mr Kin Sheng Lim, a leading consultant ophthalmologist, about what to expect from your laser iridotomy.Ī laser peripheral iridotomy is a procedure used to treat angle-closure glaucoma. If you are scheduled to undergo laser iridotomy for glaucoma or considering the procedure, you may be wondering how it works, what happens before, during and after the procedure as well as if there are risks.
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