Table 7.
Contact-lens related complications (adverse events) in keratoconus eye.
| Complications | Type of contact lens used | Rate (% eyes) |
|---|---|---|
| Discomfort/lens intolerance | RGPCL | 3.9 to 32.7 [13, 35, 41] |
| HCL | 62.5 [112], 12.1 [113], 1.6 [107], 29.1 [108] | |
| Unsatisfactory vision | RGPCL | 15.6 [13] |
| HCL | 5 [112] | |
| Corneal warpage | RGPCL | 77 [33] |
| Alterations of the tear film | RGPCL | [68] |
| ScCL | [131], 45 [125] | |
| Difficulties with the lens manipulation | RGPCL | 3.1 [13] |
| HCL | 12.1 [113] | |
| ScCL | [121] | |
| Neovascularization | SCL SiH | 3.2 [20] |
| Staining | SCL SiH [20] | 4.26 [20] |
| RGPCL | 38 [139] | |
| Injection | SCL SiH | 2.13 [20] |
| RGPCL | 15 [139] | |
| Superficial punctate keratitis | RGPCL | 4.6 [13] |
| 0.002 [41] | ||
| Giant papillary conjunctivitis | RGPCL | 11.8 [41] |
| PBCL | 4.6, 13.7 [92] | |
| HCL | 11.5 [112], 25 [108] | |
| Corneal erosion | RGPCL | 7.5 [41] |
| HCL | 1.6 [112] | |
| Corneal staining/SPK | PBCL | 3.4 [92] |
| HCL | 3.2 [112] | |
| Corneal vascularization | HCL | 25 [108] |
| Lens damage/loss | PBCL | 3.4 [92] |
| HCL | 3.2 [112], 29.1 [108] | |
| Interleukin changes | PBCL | 58.3 [97] |
| Keratocyte density | PBCL | 58.3 [97] |
| Discontinuation CLs | HCL | 9.1 [113] |
| Dry eye | HCL | 4.9 [112], 4.7 [107] |
SCL: soft contact lens; RGPCL: rigid gas permeable contact lens; PBCL: piggyback contact lens system; HCL: hybrid contact lenses; ScCL: scleral contact lens