|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Web site created by
Berney Design
|
|
|
|
Enhancements and more surgery
|
“Enhancement” is really a euphemism for “more surgery.” Current technology can surgically correct simple problems, like residual refractive error (defocus) and regular astigmatism (cylinder). But additional surgery for these problems is not always advisable, especially when the residual refractive error is small (because there is a risk of overcorrection, as well as creating new, uncorrectable problems), or when there are other problems (like dry eye or thin corneas).
Current technology cannot reliably fix some problems created by refractive surgery. Optical zones that are too small, off center and/or when the surface is irregular can be made worse with additional surgery. Technology continues to improve, however, and there have been advances in measuring and describing the different visual problems after refractive surgery. But laser technology has not advanced to the level where the solutions to many problems are reliable enough to recommend considering additional surgery
|
|
back to visual-optical complications
|
|
back to handbook
|
|
|
|
|
|
|
