YAG laser capsulotomy opens a clouded posterior lens capsule that has formed after cataract surgery, restoring a clear visual axis without a new incision. It is among the most frequent ophthalmic laser procedures. This guide describes how it is performed, the energy ranges that are usually discussed, the lenses and accessories involved and the complications to plan for, for ophthalmologists equipping or upgrading a YAG room.
Why a YAG laser capsulotomy is needed
After cataract surgery, lens epithelial cells can proliferate on the posterior capsule that supports the intraocular lens. This posterior capsule opacification causes blur and glare weeks, months or years later. Because the capsule is thin and sits behind the lens, a pulse of focused energy can open it without touching the eye surface.
Nd:YAG at 1064 nm works by photodisruption: a nanosecond pulse creates a plasma micro-explosion at the focal point that tears the capsule mechanically rather than burning it. Anyone searching for the difference with trabeculoplasty can read SLT versus YAG lasers.
How the procedure is performed
The pupil is usually dilated, topical anaesthetic is applied, and a capsulotomy contact lens is placed on the cornea. The surgeon focuses the aiming beam slightly behind the lens implant, then fires pulses in a cruciform or circular pattern to create an opening of roughly the pupil size in dim light. Many surgeons avoid the central optical zone first and work outwards.
Intraocular pressure is checked after treatment, and anti-inflammatory or pressure-lowering drops may be used according to the clinic protocol. The treating ophthalmologist decides these steps; the points here are general orientation.
YAG laser energy settings and device features
Published practice usually starts at low energy, in the range of about 1 to 2 mJ per pulse, and increases only as needed, because higher energy raises the risk of marking the intraocular lens. Burst mode, which fires two or three pulses per shot, can help on tough membranes at a lower individual energy.
The Q-Las offers 0.5–10 mJ, a 4 ns pulse, burst of 1, 2 or 3 pulses, up to 10 Hz Quick-Repetition and a focus shift of 0, 150 or 300 µm posterior. A dual-spot aiming beam, coaxial illumination and an integrated Clear-View filter support precise focusing, and an optional head-up display keeps parameters in view. Always follow the manufacturer's instructions for the specific unit.
Complications and how equipment helps
Recognised risks include a transient rise in intraocular pressure, pitting of the implant, floaters, inflammation, cystoid macular oedema and, rarely, retinal detachment. Careful patient selection, minimum effective energy and good optics reduce but do not remove these risks. Informed consent and follow-up arrangements are part of the protocol.
Optical quality and a stable, repeatable focus are the equipment factors that matter most. Posterior focus offset helps keep the plasma behind the implant, and a large, clear view reduces misplaced shots.
Equipping a YAG room: combos and next steps
Ask about slit-lamp quality, table height and wheelchair access, service and training. If your clinic also treats glaucoma, the COBRA combines the CITO 532 SLT laser and the Q-Las on one motorised table with height adjustment up to 920 mm, saving space. For a wider market overview see ophthalmic laser buying guide.
Beckfinity can arrange installation, training and servicing in the UAE. To discuss a YAG room, contact our specialists.
Frequently asked questions
When is YAG capsulotomy performed?
When posterior capsule opacification reduces vision or causes glare after cataract surgery. Timing is decided by the ophthalmologist.
What energy is used?
Practice usually starts low and increases as needed. The Q-Las offers 0.5–10 mJ and a burst mode of up to three pulses, with the exact setting chosen by the surgeon.
Does YAG capsulotomy hurt?
It is generally performed with topical anaesthesia and takes minutes, but experience varies. The surgeon will explain what to expect.
Can one workstation do YAG and SLT?
Yes. The COBRA combines the CITO 532 SLT laser and the Q-Las Nd:YAG laser as two independent lasers on one table.
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