Research Article
Extrusion of Femtosecond Laser-Implanted Intrastromal Corneal Ring Segments in Keratoconic Eyes: Prevalence, Risk Factors, and Clinical Outcomes
Table 3
Presumable risk factors in the ring extruded cases.
| | Patient factors | Topography factors | Keraring factors | | Patient # | Age | Sex | Atopic association | Sun exposure | Dry eye severity level | Stage of KC | K max | Cone position | Minimal CT | Number of rings | Extrusion after mns | Ring thickness | Ring arc | CXL timing |
| | 1 | 25 | F | + | − | 2 | 3 | 58.57 | Eccenteric | 420 | 2 | 6 | 300–250 | 160–160 | Same session | | 2 | 18 | F | − | + | 2 | 3 | 59.7 | Eccenteric | 410 | 2 | 3 | 300–300 | 160–160 | Same session | | 3 | 18 | F | − | + | 3 | 3 | 61.22 | Eccenteric | 390 | 2 | 5 | 250–250 | 160–160 | Same session | | 4 | 23 | F | − | − | 2 | 3 | 62.92 | Eccenteric | 402 | 2 | 8 | 300–300 | 210–90 | Same session | | 5 | 20 | F | + | + | 3 | 3 | 55.18 | Eccenteric | 395 | 2 | 12 | 300–250 | 210–90 | Same session | | 6 | 21 | F | − | + | 3 | 3 | 60.57 | Eccenteric | 384 | 2 | 12 | 300–250 | 160–160 | Same session | | 7 | 19 | M | + | + | 3 | 3 | 68.96 | Eccenteric | 412 | 2 | 7 | 300–300 | 160–90 | Sequential |
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F, female; M, male; KC, keratoconus; K, keratometry; CT, corneal thickness; CXL, crosslinking.
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