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Abstract
Customized correction of refractive errors using wavefront technology is revolutionizing the way we think of and treat refractive errors.
There are two reasons for this paradigm shift.
The first is that wavefront technology has allowed us to treat not only second-order aberrations, i.e., sphere and cylinder, but also Higher-order Aberrations (HOA) such as coma and spherical aberrations which exists in normal individuals as well as postrefractive surgery patients.
We have been correcting second-order aberrations for the past 200 years, and are now on the verge of being able to detect and correct HOA with laser refractive surgery, contact lenses, and intra-ocular Lenses (IOLs).(3)The second major shift is perhaps even more fundamental.
Until now,eye care practitioners have worked primarily to preserve vision in their patients but have not seen it as their role to enhance vision beyond what nature has designed.
With the advent of adaptive optics, it seems possible to correct most of the eye’s aberrations and improve contrast beyond what we viewed as normal previously.
For some patients, this is a trivial improvement, but in some cases, visual performance can be considerably improved.
Thus, there is a subtle but important shift in our view of ophthalmic optics and the potential of the human visual system.(3)This study was carried out on sixty eyes having refractive errors(myopia, hypermetropia and/or astigmatism).