PMC5399977_01
Pre-op Orbscan of the left and right eyes showing early ectasia.. Abbreviations: OD, right eye; OS, left eye.
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The steepest keratometry value was 46.2 and the pachymetry value was 469 mum (Figure 1).
Left eye 3 weeks post-op.
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A central corneal opacity had increased in density at the central anterior stroma with surrounding diffuse superficial stromal haze (Figure 2).
(A and B) Left eye 4 months post-op showing central corneal opacity with dense central vertical striae.
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The left corneal opacity with vertical striae and fine iron line remained visible at 4 months post-op (Figure 3A and B).
Right eye 6 months post-op showing diffuse anterior stromal haze without the central dense opacity.
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At 2 weeks post-op, the right eye had healed well with an uncorrected visual acuity (UCVA) of 1.0; however, fine anterior stromal reticular haze had formed centrally, which remained visible 6 months post-op (Figure 4).
Early post-op (3 weeks) vs late post-op (6 months).. Notes: (A) Corneal OCT of the left eye showing stromal thinning with the epithelium compensating for the thinning of the stroma with resulting improvement in the hyperopic refraction. (B) Pachymetry and epithelial maps of the left eye at 3 weeks and 6 months post-op. Notice the recovery of stromal thickness and epithelial compensation.. Abbreviations: OCT, optical coherence tomography; SSI, scan score index; OS, left eye.
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A corneal OCT comparison of 2 weeks and 6 months post-op of the left eye showed how the epithelium compensated largely for the stromal thinning and hyperopic shift (Figure 5A and B).
Post-op right eye (4 months) showing normalized postoperative stromal and epithelial thicknesses.. Abbreviations: OD, right eye; SSI, scan score index.
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There was no anterior stromal thinning or epithelium thickening in the right eye on corneal OCT at 6 months post-op (Figure 6).