Table 4.
Summary of previous studies on non-toric and toric intraocular lens implantation for keratoconus.
| Author | Number of eyes | Age (years) | Follow-up (months) | IOL type | IOL calculation formula | Keratometry | UDVA | CDVA | Spherical equivalent | Astigmatism | within ± 0.5 D(%) | within ± 1.0 D(%) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Leccisotti et al.1 | 34 | 56.7 ± 10.4 | 17.4 ± 5.1 | non-toric | Holladay 2 | topography | 0.48 ± 0.25 (decimal) | 0.76 ± 0.23 (decimal) | −1.31 ± 1.08 | 1.22 ± 1.37 | 9 | 47 |
| Thebpatiphat et al.2 | 12 | 55.3 ± 11.8 | 3 | non-toric | SRKI, SRKII, SRK-T | keratometer topography | 0.63 ± 0.47 | 0.21 ± 0.13 | −1.44 ± 1.69 (mild), −5.85 ± 3.94 (moderate) | N.A. | N.A. | N.A. |
| Watson et al.3 | 91 | 59 | 33 | non-toric | SRK-T | keratometer | N.A. | 0.3 (mild) 0.2 (moderate) 0.2 (severe) | −1.0 (mild)-1.5 (moderate) −5.4 (severe) | N.A. | N.A. | 60 (mild) 41.9 (moderate) N.A. (severe) |
| Navas et al.4 | 2 | 55, 46 | 12 | toric | SRKII | topography | 20/25 | N.A. | −0.5, 0 | 0.5 | N.A. | N.A. |
| Visser et al.5 | 3 | 78, 64, 64 | 6 | toric | SRK-T | keratometer | 20/50, 20/130, 20/30 | 20/30, 20/40, 20/25 | −0.75, −3.25, −0.63 | 1.5, 1.5, 0.75 | N.A. | N.A. |
| Jaimes et al.6 | 19 | 48.2 ± 6.6 | 7.9 ± 6.6 | toric | SRKII | topography | 0.29 ± 0.23 | 0.11 ± 0.12 | −0.46 ± 1.12 | 1.36 ± 1.17 | 38 | 85 |
| Nanavaty et al.7 | 12 | 63.4 ± 3.5 | 9.0 ± 8.1 | toric | company proprietary software | N.A. | 20/40 | 20/30 | 0.10 ± 0.60 | 0.60 ± 1.10 | N.A. | N.A. |
| Alió et al.8 | 17 | 56.6 ± 12.5 | 9.1 | toric | Hoffer Q, SRK-T | keratometer | 0.32 ± 0.38 | 0.20 ± 0.36 | −0.62 ± 0.97 | 1.40 ± 1.13 | 71 | 71 |
| Hashemi et al.9 | 23 | 59 ± 12.8 | 3 | toric | Hoffer Q (axial length < 22 mm) SRK II (22 to 24.5 mm) Holladay I (24.5 to 26 mm) SRK/T (> 26 mm) | keratometer topography | 0.27 ± 0.18 (mild) 0.34 ± 0.19 (moderate) 0.38 ± 0.29 (severe) | 0.16 ± 0.09 (mild) 0.18 ± 0.12 (moderate) 0.35 ± 0.13 (severe) | −0.58 ± 0.95 (mild) −0.34 ± 0.90 (moderate) 0.50 ± 0.58 (severe) | 1.83 ± 0.90 (mild) 1.25 ± 0.96 (moderate) 4.67 ± 2.31 (severe) | N.A. | N.A. |
| Kamiya et al.10 | 19 | 63.1 ± 9.1 | 3 | toric | SRK-T | keratometer | 0.46 ± 0.33 | −0.01 ± 0.09 | N.A. | 0.70 ± 0.60 | 68 | 95 |
IOL = intraocular lens, UDVA = uncorrected visual acuity, CDVA = corrected visual acuity, D = diopter, N.A. = not available.
Results was expressed as mean ± standard deviation.