الفهرس 
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Abstract
This essay discussed several options with the patient and
differentiated between those that would mainly be advantageous to
addressing the refractive error (i.e., lower-order aberration) and those that
would mainly address the halos and glare (i.e., higher-order aberrations).
The surgical options included: (1) PRK, (2) topography-driven laser
treatment, (3) Intacs ring segments (Addition Technology, Inc., Des
Plaines, Illinois),
Photorefractive keratectomy:
PRK would effectively reduce the refractive error; however, it
would also come with the risk of further corneal surgery, resulting in
additional decrease of the optical zone. This would likely aggravate the
patient’s night glare symptoms.
Topography-driven treatment:
Although the goal of this treatment is enlargement of the optical
zone to decrease the halo and glare phenomena, it is currently unavailable
in some countries.
Intrastromal ring segments:
INTACS also offers the option of providing a larger optical zone.
The largest drawback is its refractive predictability, which is uncertain
given the history of bilateral high myopic LASIK and enhancements.