Despite the limitations of the small sample size, the study's results suggest that parameters besides residual corneal bed thickness (eg, age, attempted correction) may have to be considered to avoid post-LASIK ectasia.

The present study provides quantitative data on the ocular rigidity coefficient based on measurements in a large series of living human eyes. A positive correlation between the ocular rigidity coefficient and the patient's age was documented.

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A 21-year-old woman had crosslinking for keratoconus in the right eye; the left eye was scheduled for penetrating keratoplasty. Five days postoperatively, she presented with geographic epithelial keratitis and iritis. Analysis of tear samples by polymerase chain reaction confirmed the diagnosis. The patient was treated with oral steroids and acyclovir, with significant improvement. Two months postoperatively, the visual acuity was improved and there was no evidence of herpetic disease recurrence. Crosslinking can induce herpetic keratitis with iritis even in patients with no history of herpetic disease. Early diagnosis and proper treatment are essential for a favorable outcome.

PURPOSE:To compare 2 sequences of combined intrastromal corneal ring segment (ICRS) implantation and ultraviolet/riboflavin-mediated corneal collagen crosslinking (CXL) in progressive keratoconus.SETTING: Dunya Eye Hospital, Istanbul, Turkey. METHODS:In this prospective comparative randomized consecutive study, CXL was followed by ICRS implantation (Group 1) or ICRS implantation was followed by CXL (Group 2). Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, spherical equivalent (SE), manifest cylinder (cylinder), and mean keratometry (K) were compared preoperatively and postoperatively. RESULTS:The mean interval between treatments was 7 months G 2 (SD) (mean follow-up, 13 G 1 months). The mean UDVA and CDVA improved in both groups (UDVA: 0.07 G 0.09 to 0.25 G 0.12, Group 1, and 0.11 G 0.09 to 0.32 G 0.21, Group 2; CDVA: 0.24 G 0.11 to 0.41 G 0.20 and 0.22 G 0.16 to 0.55 G 0.2, respectively). The mean SE, cylinder, and mean K values decreased in both groups (SE: À7.13 G 3.34 D to À2.98 G 2.33 D, Group 1, and À7.05 G 5.54 D to À2

Simultaneous PRK followed by CXL seems to be a promising treatment capable of offering functional vision in patients with keratoconus.