LASIK Astigmatism Workup

Updated: Mar 03, 2017
  • Author: David R Hardten, MD; Chief Editor: Hampton Roy, Sr, MD  more...
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Workup

Laboratory Studies

For any patient undergoing surgical correction of astigmatism, the patient’s general health is important. No routine laboratory workup is typically done, but the status of any concurrent systemic disease should be known.

Diabetes mellitus, in particular, is an example of one systemic disorder that can cause wide fluctuations in the refractive status of the eye. Prior to surgical treatment, diabetes should be well controlled, and relatively stable refractions should be performed over several visits.

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Imaging Studies

The most important imaging studies for astigmatism correction are corneal topography and tomography. [39, 40, 31, 41] These imaging studies are essential in understanding the shape and curvatures of the cornea, and they can be of tremendous help in establishing a diagnosis and in deciding management.

Corneal thickness using ultrasonic pachymetry may also be useful.

In patients who have had prior surgery, such as cataract surgery, phakic intraocular lens implantation, or keratoplasty, the corneal endothelium can be monitored using specular microscopy.

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