Orthokeratology
Frequently asked questions about Orthokeratology (also known as OrthoK)
Download a copy of the Orthokeratology eBook written by Dr Carina Trinh (optometrist), Carina Eye Care.
Orthokeratology eBook
Please enter your email to receive a copy of the Orthokeratology eBook in your inbox.
Thank you!
You have successfully signed up from the Orthokeratology eBook and will receive an email shortly. Any issues, feel free to contact hello@sydneyorthokeratology.com.au.
What is Orthokeratology (OrthoK)?
OrthoK is a type of contact lens treatment where hard contact lenses are worn at night only, to gently mold the front surface of the eyes into a shape that refocuses light so that patients can see without the need for glasses or contact lenses during the day time.
Who is Orthokeratology appropriate for? Is Orthokeratology an alternative to LASIK or laser vision correction?
OrthoK is highly recommended in children between the age of 7 and 17 who are short-sighted and deteriorating rapidly. If their prescription is not stable, and is changing by -0.50DS a year or more, please ensure that they are being tested at least every 6 months by an optometrist who is up to date with the latest information on myopia control.
OrthoK is also appropriate for adults who are simply looking for an alternative form of vision correction.
What are the advantages over LASIK?
- It’s suitable for patients who don’t have a stable prescription
- It does not exacerbate dry eye
- OrthoK lenses can be adapted as your prescription changes
Who is a good candidate for Orthokeratology / OrthoK?
- Those unable to wear contact lenses due to allergies and dry eye
- Those working in dusty or dirty environments
- Active people who do not want the inconvenience of glasses or contact lenses when participating in sports
- People who want freedom from their glasses / day contact lenses
- Children whose myopia (short-sightedness) is getting progressively worse
- Mild to moderate myopia (<-4.00 cases are more straight forward)
An assessment is required with your optometrist to determine whether you are a suitable candidate, to check that your eyes are healthy, and the appropriate shape that maximises the likelihood of successful OrthoK wear. This appointment will be bulk-billed on Medicare, with no out of pocket cost – leave a note that you’d like to have an OrthoK assessment. Official recommendations from the Orthokeratology Society of Oceania can be found here.
What is Orthokeratology? How does Orthokeratology work?
When a person cannot see clearly it may be because the eye is too long, too short or the surface of the eye is out of shape so that images do not focus on the back of the eye (the retina). Normally we fix this by refocussing images with spectacles or contact lenses. OrthoK refocuses images by gently changing the shape of the front surface of the eye using tear fluid forces.
To make an OrthoK lens we first map the surface of your eye, using an instrument known as a corneal topographer. Your eye care practitioner uses this information along with your prescription to design a customised lens for your eye.
OrthoK lenses are manufactured on a high-speed computer assisted lathe. They are made of materials that have high oxygen permeability that allow your eyes to ‘breathe’ overnight while you sleep, maintaining eye health. The result after waking and removing your lenses is improved vision, with already some changes usually noted after the first night. If you stop wearing the lenses, the eyes will revert to normal within weeks.
Official information from the Orthokeratology Society of Oceania can be found here on what it is, how it works, and whether it is safe.
What role does Orthokeratology play in Myopia control / management?
The number of children who are becoming myopic has grown rapidly over the last 25 years. The Centre for Disease Control in the United States has estimated, that by the year 2020, 50% of the world’s population will have myopia. The results of recent scientific studies point to OrthoK as one of the best options for controlling myopia progression. Although, OrthoK has been shown to slow myopia progression in the groups studied, the same results cannot be guaranteed in individual cases.
How do I find a suitable Orthokeratology practitioner? How do I know if the Orthokeratology practitioner is qualified?
The Orthokeratology Society of Oceania provides world-leading training in orthokeratology, myopia, and complex contact lens fitting. Serious orthokeratologists will be registered as members, and have undertaken their courses and ongoing education. If you can find the optometrists name in this directory, then you know that they are a qualified orthokeratologist practitioner. My tip for deciding which practitioner is suitable for you or your child would be to get in touch by phone, or online to ask any questions that you may have, and to book in for a consultation to meet the optometrist to make sure that you feel comfortable with them and their expertise.
Does Orthokeratology hurt?
The OrthoK contact lenses are made of a stiffer material than soft disposable contact lenses, however the procedure does not hurt in any way. An adaptation period is required where initially the lenses may be more noticeable compared to your standard soft lens, however this improves after a few nights.
Who is answering the FAQs on this page?
My name is Carina, and I’m the author of this website, Sydney Orthokeratology. I have been practising Orthokeratology since 2013, and have had experience with forms of myopia management options a few years prior to this. My practice Carina Eye Care is situated in Burwood, an inner west suburb of Sydney in NSW, Australia. I have built my practice around providing proactive and comprehensive care, to provide patients with complete confidence in their ongoing eye care. If you are interested in meeting me for a FREE or bulk-billed consultation for you or your child, please feel free to get in touch via email, phone, or by booking an appointment online.
Is Orthokeratology safe?
This safe and effective technique is mainly used to correct short-sightedness (myopia) in suitable patients. However, it can also be used in some cases for long-sightedness (hyperopia), astigmatism, and presbyopia (blurred near vision). It is an alternative to LASIK for those who don’t want surgery.
OrthoK is a safe and reversible procedure. It was approved by the United States of America Food and Drug Administration in 2002. The Australian Therapeutics Goods Administration includes OrthoK lenses.
All contact lens wear has a small risk of serious eye infections and this includes OrthoK lens wear. Typically, infections can be treated by your eye care practitioner. The risk of infection can be greatly reduced by following your cleaning and lens care instructions meticulously, only wearing the OrthoK lenses as prescribed by your optometrist and attending the necessary follow up visits.
Can Orthokeratology be used by children?
Children make great OrthoK lens wearers. Practitioners note that children are very motivated and follow their instructions. Children also learn how to handle and care for OrthoK lenses very quickly. The OrthoK lenses are inserted just before going to bed and taken out in the morning. This means that children will not need to handle their lenses during the day or at school. When lenses are inserted there may be some mild discomfort however, the lens sensation disappears when they close their eyes and go to bed.
Is Orthokeratology safe for children?
Orthokeratology has been used in children for over 20 years now and is a great way for parents to feel at peace with their child’s eye since they no longer need to wear glasses or contact lenses during the day, only at night under where parents can monitor their insertion and removal if they are concerned. Children quickly learn how to use these lenses themselves without the help of their parents.
Are contact lenses safe for children?
Evidence shows that young children are actually much safer contact lens wearers when compared to adults in their 20s. For more information about the safety of contact lens wear in children, please watch this short video.
Why haven’t I heard about Orthokeratology before?
OrthoK is not available everywhere because it requires specific equipment and training to design the appropriate lenses for you or your child. Your optometrist works closely with the laboratory, utilising measurements to the nearest micron.
What is the process for Orthokeratology?
There are a series of steps that begin with:
Step 1: Have a full comprehensive consultation
You will need to have had a full comprehensive initial consultation with us to have your prescription measured, and your eye health assessed. At this consultation, we will also take a corneal topography map to fully assess your suitability for OrthoK.
Step 2: Start an OrthoK Program
If you choose to proceed, you will be on a plan that covers your consultations for 12 months. Either $1700 for lower prescriptions, or $2100 for higher/complex prescriptions (discounts are available if more than one child is involved, or if you refer other patients, and special consideration is given for those with difficult financial circumstances). A 50% deposit is required to start the manufacturing process for your treatment. Your lens care and eye care products for 12 months will be at an additional cost. The exact number of consultations will vary depending on your eyes and how they respond to the treatment. When you start your OrthoK program, your optometrist will place an order with the laboratory for your lenses from the data that we have gathered.
You will need to arrange for an appointment once we notify you that the lenses are ready for pick up, and also an additional appointment the morning after to review after the first night of wear.
Dr Carina Trinh (optometrist) has been practising Orthokeratology since 2013, treating hundreds of children to protect their eyes from deterioration, and free adults from their dependence on glasses.
Member of Orthokeratology Society of Oceania
Senior Vice President of Optometry Australia NSW/ACT
Starting early with myopia management is the key to the best outcome possible for your child.
Find out your child’s risk factors for myopia progression here through an online tool at MyKidsVision.org.au.