Table 1.
Classification of articles based on the type of intervention and type of studies.
| Corrections | Numbers and type of study | |||||
|---|---|---|---|---|---|---|
| Prospective comparative | Prospective cases series | Retrospective | Case report | Total | Follow-up range | |
| SCLs | 4 | 8 | 4 | 16 | Two weeks–24 months | |
| RGPCLs | 10 | 7 | 4 | 1 | 22 | 3 months–25 years |
| PBCLs | 4 | 5 | 9 | 3 weeks–3 years | ||
| HCLs | 2 | 1 | 4 | 7 | 1 day–23 months | |
| SsCLs | 6 | 11 | 12 | 3 | 32 | 1 day–85 months |
SCLs: soft contact lenses, RGPCLs: rigid gas permeable contact lenses, PBCLs: piggy back contact lens system, HCLs: hybrid contact lenses, SsCLs: scleral contact lenses.