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Originally posted by Stosh:
What is the perforated area mean ? Pupil ? Why is the OS irregular shaped, and the OD more round ?

I am not familiar with this particular topographer but generally the area bounded by the dotted line is the pupil border. The OS topography is markedly more distorted than the right and this irregularly shaped OS pupil may be an aberration of the digital image produced by the topographer secondary to the topography itself.

Can you determine the OS central island, the fish like image ? Or does the power differential between 3-5mm signifies it.

I can see it in the graphical representation but I think it is too small to scale into the keratometric data.

Can you determine from the image the ablation and blended zones ?

Not well since this is the nature of blending.

Is the ablation decentered ? Is that the ECC value in lower left ?

The Ecc. is the eccentricity determination and it is read in millimeters. There is some eccentricity present, moreso in the left eye.

Is the differential between Rh and Rv bad ?

More than you would expect following refractive surgery, again, moreso in the left eye.

Is the optical center, and geometric center apparent in the image ?

The original geometric center has been altered by the surgery. What is shown is the visual axis (fixation point) versus the topographical ablation center.

BTW, these pictures were taken with my pupils undilated. Dilated they increase about 2mm. Not sure why they were never dilated.

Appreciate your comments.

I don't know enough about your pre-operative condition to speculate. There is a significant degree of irregular astigmatism in the left eye combined with a more prolate appearance, too much to simply be an artifact of what you have described as a central island. I don't see this in the right eye. Was there a significant difference between two eyes prior to surgery?

Stosh

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