Corneal Ectasia; Case 1: Ectasia After Radial Keratotomy By Prof. Renato Ambrósio Jr - OCULUS Pentacam Interpretation Manual

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Corneal ectasia

8.1 Case 1: Ectasia after radial keratotomy
by Prof. Renato Ambrósio Jr
A 28-year-old male patient had RK (radial keratotomy) in 1995 for myopic astigmatism followed
by RK enhancement three years later in OS. Corneal topography was not performed prior to surgery
according to patient information. Uncorrected vision acuity was 20/30 in OD and 20/200 in OS.
Patient refers severe glare and starburst all day, mainly at night.
OD: sph -0.25 cyl -3.00 A 156°
„ „
OS: sph -5.00 cyl -2.25 A 39°
„ „
The Pentacam® 4 Maps Refractive map (revealed corneal ectasia in both eyes, with a more advanced
condition in OS (Figure 31). In OD
relatively good uncorrected vision.
Figure 30: 4 Maps Refractive of OD showing post-LASIK ectasia
VA 20/20
VA 20/30
(Figure 30) the central cornea showed less distortion, permitting
8 Corneal ectasia
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