Clinic will be closed
29 March (Sat) for Staff training
For emergencies, please call 6476 1211
6 Napier Road
#06-04 Gleneagles Medical Centre
Singapore 258499

Dr Christopher Khng spent a year in the USA under the Health Manpower Development Program (HMDP), sponsored by the Singapore Health Ministry to pursue advanced surgical training in the field of Complex Cataract & Anterior Segment Reconstruction surgery.

He did a clinical fellowship under the tutelage of Dr I. Howard Fine, Clinical Professor at Casey Eye Institute, Oregon Health and Science University, who is an acknowledged world expert in advanced cataract surgery and cataract surgical technology. While with Dr Fine at Oregon Eye Institute in Eugene, Oregon, Dr Khng also spent time with Drs Mark Packer and Richard Hoffman, both world renowned surgeons.

He gained extensive experience in advanced lens surgery, complex lens implant calculations, bimanual microincision phacoemulsification cataract surgery, accommodative and multifocal lens implants, and was involved in research on astigmatism correction and eye pressure changes during cataract surgery.

This research led to publications in the US peer reviewed eye journals and also to the development of a surgical instrument to improve the accuracy of incisional astigmatism correction, developed in conjunction with the American surgical company ASICO.

While in Oregon, Dr Khng gained experience with Refractive surgery, LASIK and Phakic lens implantation, including the Implantable Collamer Lens (ICL, often referred to incorrectly as the Implantable Contact Lens).

Much time was spent with Dr Robert Cionni, the inventor of the Cionni modified capsular tension ring used to secure very loose cataract lenses. This training also provided Dr Khng with the unique opportunity to gain experience with iris repair techniques and special intricate suturing methods allowing the repair to take place through tiny incisions. Dr Khng also received plenty of hands-on experience dealing with cases requiring prosthetic iris implants. Many of these cases referred to CEI were also considered “too difficult” to do by other surgeons elsewhere, and the experience gained in handling these cases has been invaluable. Again, Dr Khng was actively involved in clinical research, and the result of this research produced more than a dozen publications in the peer reviewed US journals and textbooks.

Because of this exposure to a wide variety of difficult cases, Dr Khng has a depth and breadth of experience in complex cataract surgery in Singapore.

Oregon Eye Institute with Dr Fine
Dr Khng won Best Paper in Washington DC
With Dr MacKool in New York
Cincinnati Eye Institute with Dr Osher
Cincinnati Eye Institute with Dr Cionni
Cincinnati Eye Institute with Dr Snyder
Drs Masket, Fine, Khng & Arshinoff
Dr Khng performing surgery
Traumatic cataract & iris loss before repair
After repair
Iris damage – before repair
Iris damage – after repair

Benefits of Artificial Iris Implants for albino children

Children of The Moon

 According to the Native American tribe, people with albinism are referred to as “children of the moon.” This is because of the fair coloration which they share with their legendary Moon Goddess and because they need to stay out of strong sunlight during the day. Such children were rarely seen in every society, as they form a quiet minority. They are considered deviant or strange and the main difficulty people with albinism face is fitting into society, as there is a tendency for others to treat them as freaks of nature or objects of morbid curiosity. But they are unmistakably part of every society in this world.

The word “albinism” refers to a group of inherited conditions. People with albinism have little or no pigment in their eyes, skin, or hair. They have inherited genes that do not make the usual amounts of a pigment called melanin.

Albinism affects people from all races. Most children with albinism are born to parents who have normal hair and eye color for their ethnic backgrounds. A common myth is that by definition people with albinism have red eyes. In fact, there are different types of albinism, and the amount of pigment in the eyes varies. The colour of the eyes may be described as reddish, violet, greyish blue, hazel or brown eyes.

Everyone knows that there are contact lens that can change the colour of your iris and be a fashion statement. Many fashion setters like celebrities & pop stars can now choose to have blue, brown or green eyes. But did you know that this concept is similarly used in artificial iris implants, which provides numerous medical benefits to patients with visual problems. Artificial iris implants often benefit patients who have missing or defective iris, born without an iris (a condition called aniridia) or albinos who have non-coloured iris? This life changing procedure is particularly useful to this unique group of individuals ie “children of the moon”.

Vision Problems

Dr Christopher Khng, Medical Director of EyeWise Vision Clinic, explains “the iris is the coloured part of the eye surrounding the pupil. It acts as a diaphragm or sphincter to control the amount of light entering the eye, and the quality of the visual image.”

In general, common causes of iris damage to eye patients are accidental and surgical trauma, for example during cataract surgery, where it may be more common in male patients taking prostate medications. Surgical trauma to the iris may be noticed after surgery as increased glare and light sensitivity, as the eye can no longer effectively control the amount and quality of the light entering. In the past, these types of injury were left alone because it was thought that “nothing can be done”, and the patient had to live with the discomfort. Fortunately, this is no longer the case. Dr Christopher Khng strongly emphasized that there are a wide array of surgical techniques for iris repair these days. He received his clinical fellowship at the world renowned Cincinnati Eye Institute in Ohio, USA, where he acquired skills in advanced techniques of iris repair and anterior segment reconstruction. He is at the forefront of this field.

A major problem faced by albinos is their visual sensitive to light. As the iris usually helps control the amount of light coming into your eye and hitting your retina, which is located at the back of your eyeball, its function is crucial. When a person has albinism, the iris does not have enough color and can not properly shield the retina from light. So, children with albinism often squint in bright light. Wearing sunglasses or tinted contact lenses can help make them more comfortable out in the sun.

In albinos, the lack of pigment during the development of the eye causes an abnormal development of the retina and affects the formation of the nerve pathways from the eyes to the brain, which causes decreased visual acuity or low vision. They often describe their vision as lacking fine detail. Corrective lenses (i.e. implantable lens, glasses or contact lenses) and low vision aids (i.e. magnifiers or telescopes) can provide some clarification. Some kids with albinism wear glasses or contact lenses to help them see better. Others might need eye surgery.

People with albinism also can have these problems affecting their ability to focus. That’s why it can be important for them to wear glasses. The back of the eye and the use of their vision can both develop more fully if they have the most focused image possible on the back of the eye. This focusing problem can be solved with Intraocular Lens Implants (ICL), glasses and contacts can correct these problems by reshaping the light entering the eye so that it does send an in focus image to the back of the eye, a little like correcting a blurry slide projector or a blurry image in binoculars.

To summarise, Dr Christopher Khng, (MD), highlighted that with the advancements in interior ocular technology and artificial iris implant can refine sufferers of bright light glare and improve their quality of vision and this in turn has changed and improve the quality of life and self image in society. Children of the moon are an integral part of our society and they need to talk to their eye doctor about taking care of their eyes, especially if they are going to be in the sun. The benefits and the technology is here to give focus light on medical advancements.

If you would like an assessment to see what can be done for your iris damage, please call EyeWise Vision Clinic now.