Non-surgical technique for removal of glasses
What is Ortho-k or EyeDream?
- Correct your vision while you sleep!
Ortho-k lenses correct your vision while you sleep. Simply pop your ortho-k lenses in before bedtime, remove them in the morning, and wake up to a world of clear, sharp, natural vision. Ortho-k is sometimes called EyeDream.
Sleepy Times Lenses wakey times no Lenses (ORTHO K LENSES)
- Orthokeratology (also referred to as Corneal Refractive Therapy) is a sophisticated non-surgical process using specially designed rigid gas permeable (RGP) contact lenses to gently reshape the cornea (the front layer of the eye) while you sleep. When you wake up, you remove the lenses and are able to go throughout the day without the use of glasses or contact lenses.
- The Orthokeratology lens redistributes the superficial cells of the corneal epithelium to flatten the central corneal shape, allowing light that once focused in front of retina to now focus on the retina. The lenses are worn at night during sleep, and are removed upon awakening.
- If you stop wearing the lenses regularly while you sleep, your vision will return to its original state in as little as 72 hours
- It is the reduction of refractive error by the programmed application of contact lenses.
- A method of improving unaided vision by molding the cornea with contact lenses.
- Modern Orthokeratology involves the combination of reverse geometry designs, high permeability GP materials, and corneal topography to understand the relationship of the shaping lenses to the cornea
Ortho-k for Children
Myopia Control - Reduce the progression of Short-sightedness
Ortho-k is fantastic for children. Numerous studies on myopia (short-sightedness) and ortho-k have indicated that these lenses can dramatically slow, even stop, the progression of short-sightedness in children. Subsequently they can reduce the risk of developing associated problems, such as glaucoma, in adulthood.
The improvements vary for each individual child, and the treatment has never been known to exacerbate short-sightedness, making it the best, safest option available now.
Ortho-k is ideal for:
- People who want clear natural vision all day - every day
- Sporty or active people
- Young people - Ortho-k can help to reduce the progression of shortsightedness
- People who have considered laser surgery but are worried about the risks
- People who find contact lenses uncomfortable or specs inconvenient
Ortho-K – overnight vision correction
Ortho-K (orthokeratology), also known as overnight vision correction, is the use of specially designed RGP (rigid gas-permeable) contact lenses to alter the shape of the cornea during the night. Once the lens is removed in the morning, the changed corneal shape provides clear corrected vision throughout the day.
Ortho-K correction allows you to be free of both contact lenses and spectacles for the majority of, or possibly all, waking hours. The freedom from any artificial aid appeals to myopic glasses and contact lens wearers and is ideal for sportsmen, those who work in dusty or dirty environments or people who find spectacles and conventional lenses a nuisance.
It is a suitable and reversible option for those who are either unsuitable or are not keen on laser refractive surgery.
Ortho-K lenses are also offered to the group of patients suffering from dry eyes who are no longer able to wear contact lenses comfortably during the day.
Ortho-K can also be effective with low degrees of astigmatism. The fitting process is aided by corneal topography that accurately scans the cornea and allows the manufacture of lenses with much greater accuracy than in the past, giving a controlled and precise reduction in the eye’s optical imperfection. In addition, new developments in lens materials have been made that enable safe overnight wear to be possible.
Ortho-K can help control myopia progression
Ortho-K can be used to help control myopia progression in children and teenagers by changing how the peripheral vision is focussed, which has been shown by recent studies to be the driving force behind myopia progression. Glasses and regular contact lenses will control central blur, providing a clearly perceived image, however light is focussed behind the retina in the periphery. Due to the unique way in which Ortho-K contact lenses change the corneal profile to correct the myopia, peripheral retinal blur is brought forwards so that light is focussed in front of the retina. This effect is believed to be the reason why Ortho-K is effective to help control the myopic shift in youngsters. Please visit our myopia control page for more information.
Who is suitable for Ortho-K?
The procedure works best for prescriptions of up to -4.00 dioptres of myopia and 2.00 dioptres of astigmatism. Errors above this may be reduced but total correction is not usually possible. In addition, there are several unknown factors for each individual, such as the complexity of the corneal shape and the rigidity of the cornea itself, so the speed of corneal moulding from one individual to the next will vary. While the success rate is very high, total success cannot be guaranteed due to these factors.
What does the procedure involve?
First, an assessment appointment including a full eye examination and computerised corneal topographical scan will be required. This will give us the opportunity to assess the general condition and health of the eyes and also to determine the likely effectiveness of the procedure in you.
Based on these measurements, a pair of Ortho-K contact lenses will be manufactured to reshape the cornea to a flatter profile to reduce myopia and astigmatism while dramatically improving unaided eyesight. Excellent vision and comfort are normally maintained while wearing Ortho-K contact lenses.
You will have an assessment the first morning after wearing the lenses overnight, and then the lenses will take around two weeks to have their full effect. The next check up will be after two to three weeks, when we will check that the full correction has been attained. If not, the lenses will be remade, usually with minor adjustments, until the vision is sufficiently corrected (although you will only pay for the final, successful pair of lenses). You can expect to need around two to four visits in the first two months of being fitted with Ortho-K contact lenses.
Once the lenses are working well and the vision is sufficiently corrected, you will need to wear the lenses every night in order to maintain the effect. A check-up every six months is recommended and you will need to replace the lenses every six months to a year, as they will degrade with time and usage.
The benefits of Ortho-K
- It may slow down the increase in myopia in children
- Good vision without spectacles or contact lenses for all/most of the day
- It is not a surgical procedure
- It is reversible
- It is modifiable
- It does not hurt
- Using well-established contact lens fitting techniques mean that there are very few risks
The advantages over laser surgery (Lasik)
No ethical surgeon will treat a patient until they are at least 18 or, more usually, 21 years old. Ortho-K is available to children of a young age and upwards.
- It does not cause the permanent hazy vision experienced by some patients following laser surgery
- Both eyes are done together (rather than several weeks or months apart)
- Changes in prescription over time can be dealt with, without surgery
- The procedure is REVERSIBLE
There is significant understanding of the effects of contact lens wear on the cornea because of the many years of lens use. There is no post-operative pain. Ortho-K is significantly cheaper and does not preclude surgery in the future. As yet, the long-term effects of Lasik are not totally understood.
Things to be aware of
- You must be prepared to allow for 4-6 visits over 3-6 months
- Retainer lens wear is essential or the cornea will revert to its original shape
- The degree of success is high but cannot always be guaranteed
- The speed of reduction in the myopia varies from one person to the next
- You must follow instructions implicitly for the best results
What are the costs?
The procedure is time consuming and involves several lens changes, which means that there will be more than one consultation fee. Once complete, the ongoing costs are significantly less than conventional soft contact lens wear. This cost will be slightly higher if you have astigmatism, as the lenses required are more complex.