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Corneal Topography

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Corneal Topography is a technique for mapping the surface curvature of the cornea (cornea is the transparent membrane or the front window of the eye). The image taken will be calculated and interpreted by a computer program.

What does this procedure tell you?
  • Corneal induced astigmatism: the appropriate intraocular lens could be selected when performing cataract surgery.
  • Keratoconus: this results in abnormal vision and reduced visual ability.
  • Thick or thin cornea: thin cornea is the main obstacle of LASIK.
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This procedure is beneficial for the analysis of corneal diseases or abnormalities.
 
  1. Do not use your eyes too much or let them too dry.
  2. Do not wear contact lens for at least 1-2 weeks before the procedure, or upon your ophthalmologist’s discretion.
Step 1
  1. Sit comfortably during the procedure.
  2. Blink or close your eyes as instructed.
  3. If your eyes are too dry, the nurse will apply artificial tears.
 
Step 2
While the machine is taking pictures which should take only a couple of seconds, please look straight at the red spot, do not blink until the picture is taken or when told. It should take only 3-5 minutes for the entire procedure.
 
Nil
 
There are no limitations for travel before or after the procedure.
 
 
The success of the procedure depends on the disease the patient is having.
 
What if this procedure is not performed?
Detailed analysis cannot be performed.
 
Nil

 

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