Table 2.
Annual incidence of contact lens-related bacterial, fungal, and protozoan keratitis
| Lens type | Bacterial | Fungal | Acanthamoeba |
|---|---|---|---|
| Overall incidence | 49/10,000 | ∼1/50,000119,a | 1–33/million35 |
| Soft lenses (daily wear) | 1.99–4.18/10,000 | NR | NR |
| Soft lenses (extended wear) | 19.59/10,000 | NR | NR |
| Hydrogel | 9.310–20.98/10,000 | NR | NR |
| Silicone hydrogel | 20.914–25.49/10,000 | NR | NR |
| Gas-permeable (daily wear) | 0.810–4.08/10,000 | NR | NR |
| Orthokeratology | 7.718/10,000 | NR | NR |
Note:
a
Estimation calculated from Konda et al119 which stated 5% of all contact lens microbial keratitis is fungal.
Abbreviation: NR, not reported.