Table 1 The degree of refractive correction
offered by various procedures ([dagger]) Intraocular surgery is the option of choice for refractive errors falling outside of the treatable range for PRK/LASEK/LASIK but is also suitable for lower prescriptions Refractive procedure Myopia Hyperopia Astigmatism PRK/LASEK <-6.
However, what we know about aniseikonia and the effect of refractive correction
on amblyopia mean that contact lenses are the preferred mode of optical correction for patients with this condition.
c A low power compact telescope is mounted in a carrier lens in line with the visual axis with refractive correction
Although possible, hyperphorias are less likely to respond to either refractive correction
or eye exercises, and this is where relieving prisms may be appropriate.
Recent studies have shown that refractive correction
alone (without occlusion therapy) can successfully treat amblyopia in a proportion of cases, (2-4) and the recommendation now is to provide spectacles for the child to wear constantly for around 18 weeks before considering occlusion therapy.
Keraflex[R] KXL, a non-invasive, incision-less refractive correction
procedure is the first technology that Avedro has developed from its Thermo-biomechanics and crosslinking platforms.
It is important for strabismus to be prevented by refractive correction
if appropriate, or at the very least to be diagnosed at the earliest opportunity.
In its European clinical trials for the correction of myopia and the treatment of keratoconus, a progressive disease of the cornea, Avedro has investigated a two-step procedure whereby Keraflex provides corneal flattening to achieve refractive correction
and concomitant collagen crosslinking stabilizes the cornea.
Fifty four patients were found to require a refractive correction
, without an anomaly of binocular vision.
Avedro has been conducting its own myopia and keratoconus clinical trials in Europe with its Keraflex KXL procedure, which combines refractive correction
and corneal collagen crosslinking stabilization.