FREQUENTLY ASKED QUESTIONS
Can I use this if I have already had surgery?
The SuReHaMove™ lens is from the SightMove™ family and is very successful in restoring lost vision from the ill effects of RK, PRK, and LASIK. Some, have been fortunate enough to be able to wear NightMove™ designs and function all day with good uncorrected VA and only wear the lenses at night. It is more common to wear the SuReHaMove™ lens for day time wear rather than nightwear.
Can the effects be reversed with the orthokeratology lenses?
Yes and very safely? The effects can be reversed through either ceasing the use of the existing lens system or replacing it with a differently designed one. Simply wearing the RGP lenses that the patient wore before the orthokeratology will move the cornea back to within a few hours.
What is the range of power?
Up to –4.00 – easily in most cases
Up to –6.00 – may be more effort with minor side effects such as ghosting of images.
Up to –10.00 with an understanding that if any compromise to physiology or sight occurs, the lenses are modified or redesigned for daytime wear and limited improvement.
Up to –1.50 astimia with the rule.
Against the rule can be done in many cases but must be assessed on an individual basis. A consultant may be very helpful in determining the potential success.
Can they be modified in house?
Yes! They can be modified depending on the problems and the original design. For the most part these lenses are designed at a high level of accuracy and discrete specific force control. Therefore it is difficult to make controlled shifts of lens material and stay consistent with the lens design characteristics. There are certain modification that can be done to reduce saggital depth creating more central pressure for greater power change.
How fast does the correction happen?
In most cases overnight. As the refractive target power increases, the amount of time needed to complete the results can increase. With a well designed lens generally the majority of the target power will be achieved with in a few days.
Can they be used for keratoconous?
The ConeMove™ lens are designed specifically for keratoconus. They can be used for daytime wear easily in most cases and a few cases night time wear can work in mild cases.
What are the benefits of using these over surgery?
No healing necessary
No guessing about the healing response
Can change it if visual changes occur over the years
Patient has a high degree of control by changing lenses for different purposes. Such as in presbyopia, a lens can be changed to produce a mono-aniso system.
How often do people experience problems with the lenses?
Less than 15% of the time if the doctor is skilled at orthokeratology.
What, if any, are the restrictions for who can benefit from these lenses?
These lenses work well for up to –4.00 diopters with less than –1.50 astigmia. A doctoral thesis was done by students from Pacific University in 1998 and 2000. Their results demonstrated that the NightMove™ lens were successful 94% of the time for up to -4.00 and 79% of the time on –4.00 to –10.00. Clearly, the higher the power the more potential complications may exist. Only master fitters should attempt above –5.00 diopters [in our opinion].
What kind of eye maintenance is required?
Orthokeratology patients should have a full examination and evaluation every year.
At six months intervals the corneas and the lenses should be checked.
The lenses should be resurfaced every three months without fail. Reason: Muco-Protien builds up on the surface of any contact lens over time. On a reverse geometry lens it builds up sometimes even faster as a result of the hydraulic brake effects produced by a reverse curve configuration. As the protien builds up on the concave surface of the lens, a breakdown of the mathematics on the back of the lens begins to cause a drop in performance. This is not dangerous but simply may lose of uncorrected visual acuity, comfort and enthusiam.
How long do these lenses last? The average life of a reverse geometry lens is about 2 years. They last longer or less time that 2 years.