Ask an Ophthalmologist: Dr Au Eong Kah Guan from Mount Elizabeth Hospital (Orchard) Singapore

Ask a Doctor ForumCategory: OphthalmologyAsk an Ophthalmologist: Dr Au Eong Kah Guan from Mount Elizabeth Hospital (Orchard) Singapore
dr. Au Eong Kah Guan asked 1 year ago
I am Dr Au Eong Kah Guan, an eye specialist (ophthalmologist) based in Mount Elizabeth Hospital (Orchard) Singapore and Farrer Park Hospital in Singapore.

I am currently Medical Director & Senior Consultant in International Eye Cataract Retina Centre at Mount Elizabeth Medical Centre and Farrer Park Medical Centre. I am also a Visiting Senior Consultant to the Department of Ophthalmology & Visual Sciences at Khoo Teck Puat Hospital. I was previously Head & Senior Consultant in the Department of Ophthalmology & Visual Sciences at Alexandra Hospital; Head & Senior Consultant of the Eye Clinic at Jurong Medical Centre; Adjunct Associate Professor in the Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore; Deputy Director & Head of Research in The Eye Institute, National Healthcare Group; and Deputy Director of the Clinical Research Unit at Tan Tock Seng Hospital.

I graduated from the National University of Singapore with a Bachelor of Medicine and a Bachelor of Surgery in 1989 and a Master of Medicine (Ophthalmology) in 1995. I obtained my Fellowships of the Royal College of Surgeons of Edinburgh and the Royal College of Physicians & Surgeons of Glasgow in 1995, and from the Academy of Medicine in Singapore in 1998. I obtained my Diploma in ophthalmology from the Royal College of Ophthalmologists in London in 1999 and my Membership of the Royal College of Ophthalmologists in London in 2010.

After completing 6 years of Basic and Advanced Surgical Training in Singapore, I received two additional hands-on fellowship training in diseases and surgery of the vitreous and retina in Europe and North America. I completed my first one-year clinical fellowship at the University of Manchester and Manchester Royal Eye Hospital in Manchester, United Kingdom, from 1998 to 1999 and my second 14-month clinical and research fellowship at the Wilmer Eye Institute, Johns Hopkins University School of Medicine and Johns Hopkins Hospital in Baltimore, Maryland, from 1999 to 2000.

I am a clinician-scientist active in teaching, research and innovation in many areas of ophthalmology. I have published more than 29 books and book chapters, and more than 214 scientific articles and letters in peer-review local and international journals.

My current areas of practice include retinal and macular diseases, cataract and comprehensive ophthalmology.

Learn more about Mount Elizabeth Orchard Hospital here: and Farrer Park Hospital here:

Learn more about me here:

I am excited to be here to discuss Eye Conditions and Eye Health. Ask me anything!


Want to ask a question? Submit your question at the bottom of this page. Don’t forget to include your name and email address to get notified when the doctor answers your question.

18 Answers
Nash Raj answered 10 months ago

My eyesight is often foggy and it feels like there is a layer of white smoke. Is this a sign of an eye disease?

dr. Au Eong Kah Guan
replied 9 months ago

Foggy eyesight is not normal. Is the foggy intermittent or constant? Does it improve with blinking, use of eye lubricants, closing eyes or rest?

Intermittent foggy eyesight that improves with blinking, use of eye lubricants, closing eyes or rest could be due to dry eye.

There are many causes of constant or progressively worsening foggy vision. These include cataract, macular degeneration, diabetic retinopathy.

You should see an eye specialist to determine the exact cause of your foggy eyesight. It is important to diagnose certain eye conditions early in order to save or preserve sight.

Collin answered 10 months ago

Is there a reason why I keep getting styes? I don’t wear glasses or contacts. I will get one stye almost every 3-4 months and this time round my stye is growing in size. Would eye surgery resolve the issue?

dr. Au Eong Kah Guan
replied 9 months ago

A stye is a small, red, painful lump that grows from the base of your eyelash. Most styes are caused by bacterial infection.

Although styes can be recurrent, if you are getting eyelid lumps frequently, they are more likely to be recurrent chalazia.

A chalazion is a swollen bump on the eyelid that happens when the eyelid’s oil gland, called Meibomian gland, clogs up. Some causes of recurrent chalazia are chronic blepharitis (eyelid inflammation), rosacea (a skin condition that causes redness and acne) and seborrhoeic dermatitis (red, dry, flaky and itchy skin).

A minor surgery called incision and drainage can easily remove a chalazion. However, if you have recurrent chalazia every 3 to 4 months, you should also try to prevent it. You should apply warm compresses to your eyelids for about 10 minutes 2 to 3 times a day with a warm face towel, gel pack or mask. You should also use eyelid cleansing wipes or foam to clean your eyelids and gently massage your eyelids, using light to medium pressure. Warm compress, eyelid cleansing and gentle massage help to open blocked oil glands and prevent chalazion formation.

If your condition does not respond this treatment, you should see an eye specialist. The eye specialist can prescribe low dose doxycycline to reduce the secretions in your oil glands and reduce chalazion formation.

Dennis answered 10 months ago

My grandmother had just finished cataract surgery for both of her eyes. Though she can see clearer now, she has been complaining her eyes get tired easily. She often has to closer her eyes to rest before continuing her daily activities. Is this a normal side effect of the surgery?

dr. Au Eong Kah Guan
replied 9 months ago

Eye tiredness after cataract surgery is most commonly due to dry eye or unstable tear film.

Dry eye and cataract are common in the elderly and often co-exist together. Many cataract patients, especially if they are older, already have a dry eye tendency and may first become more aware of it after their cataract surgery.

During cataract surgery, incisions made in the cornea, the transparent clear covering in the front of the eye, cut some corneal nerves. These corneal nerves are important in the self-regulation of tears since they provide the sensation in the feedback loop that signals tear production. Damaging these nerves and decreasing their function can significantly limit the eye’s ability to create a proper tear film which can lead to eye tiredness.

Typically, most patients find relief by using artificial tears or lubricating eyedrops frequently. If lubricating eyedrops or gels do not help, your mother should consult her ophthalmologist.

May Fong answered 10 months ago

My daughter is 19 years old and has a degree of about 500 in both eyes. She has been wanting lasik surgery but I am not sure about letting her do it at her age as I’ve heard from others that her eyesight might improve as she grows older. Is it okay to let her do lasik now or will her eyesight evolve?

Christine answered 9 months ago

Is it recommended to do cataract surgery in both eyes at one go?

dr. Au Eong Kah Guan
replied 9 months ago

In a patient with cataract in both eyes, most surgeons in Singapore and globally would typically perform cataract surgery in one eye first, followed by another surgery in the second eye a few days to a few weeks later. This approach allows the surgeon and the patient to evaluate the visual outcome of the first surgery, which may influence choices to be made for the second surgery.
As modern cataract surgery is very safe and effective and the rate of complications is very low, some surgeons do operate on both eyes on the same day. However, such surgeons are in the minority. Advantages of doing both surgeries on the same day include lower cost, fewer clinic visits, fasting recovery of binocular vision for driving and other critical tasks, and a quicker return to normal life. Despite these advantages, most surgeons are reluctant to routinely perform cataract surgery in both eyes simultaneously because if both eyes were to become infected or experience other serious complications at the same time, the result could be visually devastating.

Qide answered 9 months ago

I am 26 years old this year. I’m not sure what caused it but I noticed there is a brown spot on my eye white. Because of the spot, I see a floating dot. Is this serious or will it go away?

dr. Au Eong Kah Guan
replied 9 months ago

A brown spot on the white of your eye (sclera) could be due to a mole (naevus). It may also be due to a Axenfeld nerve loop which is a loop of long nerves within the white of your eye and is a normal structure in your eye.
The brown spot on the white of your eye is unrelated to your symptom of a floating dot. The brown spot on the white of your eye can be seen by you in the mirror or by someone else.

A floating dot seen in your visual field is called a floater. Someone else cannot see the floater you have. Floaters are tiny spots, specks, flecks, “flies” and “cobwebs” that drift aimlessly around in your field of vision. Most floaters are harmless but sometimes, floaters can be a sign of more serious eye problems such as retinal tear or retinal detachment.

You should see an eye specialist to determine the cause of your brown spot on the white of your eye and to check if your floater is associated with any serious retinal condition which may require treatment. If your floater is new or of recent onset, you should arrange to see your eye specialist urgently.

Huie Hong answered 9 months ago

My mother keeps complaining about seeing a rainbow circle. When I Googled it, I found some articles that warn it is one of the early signs of glaucoma. Is that true? Can it be prevented from developing? How do we do that?

dr. Au Eong Kah Guan
replied 9 months ago

Seeing a rainbow-coloured circle around a light source, like a street lamp, can be a cause of concern. These bright circles around a light source are called “haloes”. Haloes around light sources are caused by diffraction or the bending of light entering your eye. There are many eye conditions that can cause this to happen, including glaucoma, cataract, Fuch’s endothelial dystrophy and keratoconus.

A special type of migraine called ocular migraine may also cause rainbow coloured lights. In addition, some people with ocular migraine may see flashing or shimmering lights, zig-zag lines or a blind spot.

It is very important that your mother visits an eye specialist to determine the exact cause of her symptoms. Some conditions, such as glaucoma, can cause irreversible blindness if it is diagnosed late or if left untreated.

Jean answered 7 months ago

Hi, my six-year daughter has a chalazion on her right eyelid for more than 6 weeks. She was prescribed with oral antibiotics and antibiotic ointment for 1 week recently. We also did warm compresses and eyelid cleansing for her during the same week. As the chalazion did not subside, her eye specialist advised that a incision and drainage procedure be performed.

May i know if there is chance for the chalazion to subside on its own if we continue with warm compresses, eyelid cleansing and gentle massage? If yes, how long should she continue with this treatment for us to assess if it works for her? Thank you.

Your Question

Share this thread with a friend:

Share on facebook
Share on twitter
Share on linkedin
Share on whatsapp
Share on email

Your compare list