Table 3.
Comparative studies on contact lens efficacy and comfort (GP and soft/scleral/hybrid contact lenses).
| Author | Study design | Contact lens type | No. of eyes | Follow-up (months) | Keratometry (D) | BCLCVA (logMAR) | Contrast sensitivity | Wear-time (hours)/comfort | Cons |
|---|---|---|---|---|---|---|---|---|---|
| Gupta et al. [19] | Randomised comparative trial | Rose K vs. Soper | 60 | 3 |
Sim K max Rose K: 56.72 ± 4.54 Soper: 55.5 ± 3.88 |
Rose K: 0.06 ± 0.09 Soper: 0.09 ± 0.1 |
NA | Rose K group had better comfort scores | NA |
| Levit et al. [24] | Randomised controlled trial | Zenlens (Scleral lens)a vs. Rose K | 34 | 4 | Kmax (mean): 6.2 mm (±0.60) | No significant difference (P = 0.563) | No significant difference (P = 0.316) | SL had higher subjective comfort scores (P = 0.002) | NA |
| Kazanci et al. [20] | Comparative | Rose K, Boston Equalens II, Boston 7, CFKE | 229 | ≥12 | NA | Significant ↑ VA (P < 0.05) | NA | Rose K: 9.7 ± 0.88; Boston Equalens II: 8.0 ± 1.39; Boston 7: 7.9 ± 1.19; CFKE: 8.7 ± 2.24 | NA |
| Fernandez-Velazquez et al. [22] | Retrospective comparative | KIC and Rose K | 94 KIC, 97 Rose-K | ≥6 | Sim K steep: 47.90 ± 3.70 (KIC), 49.00 ± 3.42 (Rose K) | 0.04 ± 0.07 (KIC), 0.04 ± 0.07 (Rose K) | NA | 11.6 ± 1.5 (KIC), 11.1 ± 1.5 (Rose K) | NA |
| Betts et al. [23] | Case series | Rose K and habitual | 20 | 2 | Steep K: 51.74 ± 4.48 (steep eye) | NA | Improvement 0.67 ± 1.28 points (5-point scale) |
15.33 ± 2.74 (Rose K) 14.89 ± 2.76 (habitual) |
NA |
| Hassani et al. [25] | Comparative | GP, ClearKone SynergEyes hybrid | 28 | NA | Mean K: 7.23 ± 0.62 (mm) |
ClearKone: 0.022 ± 0.03 GP: 0.057 ± 0.09 (P = 0.004) |
NA | NA | NA |
| Carracedo et al. [26] | Comparative study | ClearKone vs. habitual CL | 33 | 1 | Mean K steep: 55.11 ± 9.37 |
0.16 ± 0.12 (habitual) −0.006 ± 0.058 (ClearKone) |
1.26 ± 0.22 (habitual) 1.65 ± 0.19 (ClearKone) (P < 0.001) |
VAS comfort score: 8.37 ± 1.43 (ClearKone) | NA |
| Hashemi et al. [27] | Comparative case series | ClearKone-Synergeyes, GP | 40 pts | NA |
Mean K ClearKone: 48.68 ± 5.82 (R) 48.99 ± 4.28 (R) |
ClearKone: 0.01 ± 0.02 (R) GP: 0.02 ± 0.03 (R) (P = 0.22) |
NA | Comfort: ClearKone > GP | NA |
D diopter, BCLCVA best contact lens corrected visual acuity, K keratometry, max maximum, NA not applicable, VA visual acuity, KIC kerasoft IC, RGP rigid gas permeable, CL contact lens, VAS visual acuity score, R right.
aAlden Opital/Bausch and Lomb, Kingston-upon-Thames, UK.