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YAG Laser Treatment for Blurry Vision After Cataract Surgery

A safe and effective outpatient laser treatment for blurry vision after cataract surgery

Dr. Christopher Khng

Dr. Christopher Khng

  • Medical Director, Cataract Surgery Specialist
  • MBBS, M.Med(Ophth), FRCS(Edin), AMS(Ophth 2003)

Table of Contents

If your vision has become cloudy, hazy or glare-sensitive in the months or years after cataract surgery, you are not experiencing a recurrence of your cataract.

What you are most likely experiencing is posterior capsule opacification (PCO), a common and treatable condition in which the thin membrane behind your intraocular lens gradually clouds over.

A quick, painless laser procedure called YAG laser capsulotomy can restore your visual acuity to what it was after your cataract surgery, usually within hours.

At EyeWise Vision, Dr Christopher Khng performs YAG laser capsulotomy and laser peripheral iridotomy (for narrow-angle glaucoma). The procedure is typically quick, non-invasive and is performed as an outpatient procedure.

What Is YAG Laser Treatment?

YAG laser treatment uses a Neodymium-doped YAG (Nd:YAG) laser — a precise and focused laser that delivers targeted energy pulses to specific eye structures without making any incision and without touching the eye surface. It is a non-invasive procedure performed at a laser machine while you are seated comfortably.

There are two distinct conditions treated by YAG laser at EyeWise Vision:

  • YAG laser capsulotomy: to treat posterior capsule opacification (PCO) following cataract surgery
  • YAG laser peripheral iridotomy (LPI): to treat or prevent narrow-angle glaucoma

The specialist leading your care

Our Cataract Surgeon

Consultation with Dr Christopher Khng Eye & Cataract Surgeon

Dr Christopher Khng

Medical Director, Senior Consultant Ophthalmologist & Cataract SpecialistMBBS, M.Med(Ophth), FRCS(Edin), AMS(Ophth 2003)

Dr Christopher Khng is a Fellowship-Trained eye specialist based in Singapore, specialising in Cataract Surgery, utilising Bladeless techniques and advanced Lens Implants.

With over two decades of experience in complex cataract surgery and anterior segment reconstruction, Dr Khng manages advanced cataract cases requiring specialised surgical techniques.

His expertise covers iris repair and complex intraocular lens surgery procedures, often required when standard cataract surgery is insufficient. 

Dr Khng graduated from the National University of Singapore (NUS), following his initial medical training at Aberdeen University in Scotland, where he received academic distinctions in medicine.

Built on extensive international training and clinical tenure, he is proficient in treating complicated cataract cases with minimal visual compromise, utilising established techniques and implant devices such as capsular tension rings, iris hooks and specialised sutures.

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Consultation with Dr Christopher Khng Eye & Cataract Surgeon

Dr Christopher Khng

Medical Director, Senior Consultant Ophthalmologist & Cataract SpecialistMBBS, M.Med(Ophth), FRCS(Edin), AMS(Ophth 2003)

YAG Laser vs LASIK: Not the Same Thing

Many patients who have heard the term ‘YAG laser’ confuse it with LASIK. They are entirely different procedures treating different conditions.
YAG Laser TreatmentLasik
What it treatsCloudy lens capsule (PCO) or narrow angle (glaucoma)Refractive errors: myopia, hyperopia, astigmatism
Where it actsInside the eye: posterior capsule or irisCornea: surface of the eye
IncisionsNone — completely non-invasiveCorneal flap created
Who needs itPost-cataract surgery patients; narrow-angle glaucoma patientsPatients seeking to reduce glasses or contact lens dependence
RecoveryHours — return to normal activities same dayDays to weeks for corneal healing
Is it permanent?Yes. PCO cannot recur after capsulotomyYes. Corneal reshaping is permanent

Understanding Narrow Angles and Glaucoma Risk: How Laser Iridotomy Helps

The drainage angle of the eye — the channel through which aqueous fluid flows out of the anterior chamber — can be anatomically narrow in certain individuals. This is more common in Asian populations, including Singaporeans, than in Western populations, partly due to differences in eye anatomy.

A narrow angle raises the risk of acute angle-closure glaucoma: a sudden and painful spike in intraocular pressure that can cause permanent vision loss within hours if not treated.

Laser Peripheral Iridotomy (LPI): Preventive Treatment

YAG laser peripheral iridotomy (LPI) creates a tiny, microscopic opening in the peripheral iris using the Nd:YAG laser. This opening allows aqueous fluid to flow freely between the posterior and anterior chambers of the eye, equalising the pressure and preventing the angle from closing. The procedure is preventive and takes approximately 10 minutes per eye.

  • No incision, no stitches. The laser creates the opening without touching the eye surface
  • Performed under topical anaesthetic eye drops. No injections required
  • Both eyes are typically treated to protect the fellow eye if narrow angles are bilateral

For a full overview of glaucoma risk and treatment options, visit our glaucoma treatment page.

The YAG Laser Procedure: Step by Step

Many patients feel anxious about a laser procedure on their eye. In practice, YAG laser capsulotomy is one of the gentlest, most comfortable procedures in ophthalmology. Here is exactly what happens during your visit.
Five-step YAG laser capsulotomy patient journey from consultation to one-month review at EyeWise Vision Singapore

1

Consultation and Diagnosis

Our eye specialist performs a slit-lamp examination to assess the posterior capsule, confirm the extent of opacification, check visual acuity and measure intraocular pressure before proceeding.

2

Mydriatic Drops Applied

Dilating drops are instilled to widen the pupil, providing clear access to the optical axis and posterior capsule. You will wait 15 to 20 minutes for full dilation in the clinic.

3

Topical Anaesthetic Drops

A local anaesthetic is applied as eye drops to the eye surface. There are no injections and no discomfort during the laser itself.

4

YAG Laser Treatment (under 5 minutes)

You are seated at the laser machine and asked to look straight ahead. The Nd:YAG laser delivers precisely calibrated energy pulses to the posterior capsule, creating a small, permanent opening in the clouded membrane. You will see brief flashes of light. The laser disruption takes under five minutes and is completely painless.

5

Post-Procedure Assessment

Intraocular pressure is measured again immediately after to check for any pressure rise. Anti-inflammatory eye drops are prescribed for a one-week course.

6

1-Month Follow-Up Review

A one-month follow-up appointment is scheduled to measure visual acuity, confirm optical clarity and perform a retinal check to exclude any post-procedure complications.

What to Expect and Recovery

During the Procedure

  • You will see brief, rapid flashes of light. Not painful — just momentarily bright
  • No sensation of cutting or heat. The laser disruption occurs internally without you feeling anything
  • Vision may appear slightly blurred immediately after due to dilating drops and floating debris from the disrupted capsule. This clears within a few hours
  • Mild eye irritation may occur after the anaesthetic wears off. This is managed with prescribed anti-inflammatory drops

Recovery and Aftercare – Same Day, Zero Downtime

  • Return to normal daily activities the same day
  • Vision continues to improve over the following 24 to 48 hours as the debris from the disrupted capsule settles and clears
  • Arrange transport for the day. Mydriatic drops will temporarily blur your vision and make you more light-sensitive for several hours; driving is not recommended on the day itself
  • Use prescribed anti-inflammatory drops for the full one-week course as directed
  • The results are permanent. Once the posterior capsule has been opened, PCO cannot recur. There is no need for repeat treatment

YAG Laser Treatment Cost in Singapore: Fees and MediSave Coverage

EyeWise Vision complies fully with MOH fee advisory guidelines. All fees are disclosed in advance. The table below provides a reference range for planning. Exact fees will be confirmed at your consultation. MediSave claimable amounts are updated periodically by CPF — always verify current withdrawal limits at cpf.gov.sg before your procedure.
 

Disclaimer: Any fees or cost estimates are indicative, subject to change over time and may vary based on individual clinical needs and other factors.

Cost ComponentYAG CapsulotomyLaser Peripheral Iridotomy
Surgeon fee (excl. GST) SGD $1,100 to $1,800SGD $500 to $900 per eye
Typical total bill (private hospital, incl. GST)~SGD $1,490 to $2,219~SGD $2,021 to $2,785
MediSave claimable (approx.)~SGD $490~SGD $1,120
MOH TOSP codeSL815L, Table 1CSL801I, Table 2C

Insurance Coverage

  • MediSave: YAG laser capsulotomy is claimable under TOSP code SL815L from your own CPF MediSave account, or a spouse’s or child’s account
  • Integrated Shield Plans: AIA HealthShield, Prudential PRUShield, NTUC IncomeShield and Great Eastern SupremeHealth typically cover the balance above MediSave.
  • Corporate insurance: Many employer-sponsored plans include coverage for ophthalmic procedures — check with your HR or insurer
  • Claims assistance: Our team can help you navigate MediSave claims and insurance paperwork so you can focus on your recovery
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YAG Laser Treatment at EyeWise Vision Clinic

Patient consultation with Dr Christopher Khng at EyeWise Vision Clinic
YAG laser capsulotomy is a precise outpatient procedure used to restore visual clarity after PCO develops following cataract surgery.
 
At EyeWise Vision, the procedure is performed by Dr Christopher Khng using Nd:YAG laser technology in a clinical setting designed for patient comfort and safety.
 
Each treatment is tailored to the individual eye, taking into account the degree of capsule opacity, visual symptoms, and lens characteristics. Most procedures are completed within minutes and patients can usually return home shortly afterwards.

Frequently asked questions

Patient information

About the Procedure

No. Cataract surgery is a separate, earlier procedure that removes the cloudy natural lens and replaces it with a clear artificial intraocular lens (IOL). YAG laser capsulotomy is a 5-minute outpatient laser procedure performed months or years later, specifically to treat the cloudiness that can develop on the lens capsule behind the IOL. If your vision has become cloudy again after successful cataract surgery, YAG laser — not repeat cataract surgery — is the solution.
No. Only topical anaesthetic eye drops are used. There are no injections, no incisions and no physical contact with the eye. During the laser itself, patients typically see brief flashes of light and feel nothing. Mild irritation may occur once the anaesthetic drops wear off, which is managed with the prescribed anti-inflammatory drops.
Most patients notice significantly clearer vision within a few hours of the procedure as the debris from the disrupted capsule settles. Full visual improvement, including sharper visual acuity, reduced glare and better contrast sensitivity, is typically achieved within 24 to 48 hours. Dr Khng will confirm your visual recovery at the one-month follow-up appointment.
No. The YAG laser creates a permanent opening in the posterior capsule. Once the optical pathway is cleared, posterior capsule opacification cannot recur in the same location. This is a one-time, permanent treatment. You will not need a repeat capsulotomy for the same eye.
There is no recovery period in the traditional sense. Most patients return to normal daily activities on the same day, with vision continuing to improve over the following 24 to 48 hours as debris from the treated capsule settles.
We recommend arranging transport for the day of the procedure. The mydriatic drops used to prepare the eye will temporarily blur your vision and make you sensitive to bright light for several hours. Once the drops wear off, usually later the same evening, your vision and light sensitivity return to normal.

Risks and Side Effects

YAG laser capsulotomy is a very safe, well-established outpatient procedure with a low complication rate. Possible side effects include a temporary rise in intraocular pressure immediately after (monitored in clinic and managed with pressure-lowering drops if needed); new floaters in the days following treatment as capsule debris settles; and in rare cases, a small risk of retinal tear or retinal detachment. Dr Khng will discuss your individual risk assessment at the consultation, and the one-month follow-up includes a retinal check.
YAG laser capsulotomy has a success rate of over 95%, making it one of the most reliably effective procedures in ophthalmology. The vast majority of patients notice a significant improvement in visual clarity within 24 to 48 hours and the result is permanent.
Serious complications are rare. In a small number of cases, a temporary spike in intraocular pressure occurs immediately after the laser and is managed with drops in the clinic. A very small risk of retinal tear exists, which is why Dr Khng includes a retinal check at the one-month follow-up appointment.

Cost and Eligibility

Yes. YAG laser capsulotomy is MediSave-claimable under TOSP code SL815L (Table 1C). Claims can be made from your own CPF MediSave account, or a spouse’s or child’s account. Most Integrated Shield Plans from AIA, Prudential, NTUC Income and Great Eastern cover the balance above MediSave. Current claimable amounts should be verified at cpf.gov.sg. EyeWise Vision’s team will assist with the pre-authorisation process.
Yes. YAG laser capsulotomy is a well-established, non-invasive outpatient procedure with a very low complication rate and no incisions. For any patient experiencing hazy or glare-affected vision after cataract surgery, it is the definitive treatment and the only way to permanently restore the clarity achieved after the original operation.
YAG laser capsulotomy only needs to be done once per eye because it creates a permanent opening in the posterior capsule that cannot cloud over again. There is no such thing as a repeat YAG procedure for the same eye once the capsule has been successfully treated.
Up to 20% of patients who have had cataract surgery will develop posterior capsule opacification within two to five years of their operation. It is the most common complication of cataract surgery and is entirely treatable with a single YAG laser session at EyeWise Vision.
Most patients do not need a new glasses prescription because the procedure clears the clouded capsule without altering the focusing power of the eye. If your prescription has gradually shifted as PCO developed, Dr Khng will assess this at your one-month follow-up and advise whether an updated refraction is beneficial.

Schedule a YAG Laser Consultation

If your vision has become hazy after cataract surgery, a consultation can determine whether PCO is affecting your sight and whether YAG laser treatment is appropriate for you.
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Have concerns about your eye health or changes in your vision? Our team is here to help. Simply complete the form below, or reach us directly by phone (+65 6476 1211) or WhatsApp for assistance with your appointment.