Table 1.
Comparative findings in various types of additive keratoplasty for keratoconus
| Author | Year | Country | Study design | Number of eyes | Mean age | Type of treatment | Pocket depth | Form of the lenticule | Follow-up (months) | Findings |
|---|---|---|---|---|---|---|---|---|---|---|
| Jafarinasab et al. [22] | 2021 | India | Prospective | 5 | 29 | Femtosecond Laser-assisted Allogenic Stromal Keratoplasty With or Without Excimer Laser Donor Keratomileusis | 360 µm | concave | 28.4 | A regularization of the anterior surface of the cornea was achieved, along with a correction of refractive errors |
| Pedrotti et al. [28] | 2021 | Italy | Trial | 34 | / | Femtosecond laser-assisted stromal lenticule addition | 200 µm above the endothelium | biconvex | / | The corneal thickness was improved, and there was a satisfactory restoration of the posterior surface |
| Pedrotti et al. [54] | 2023 | Italy | Prospective | 15 | 47 | Femtosecond intrastromal lenticular implantation | 100 µm above the endothelium | positive meniscus lamella | 12 | MS-SLAK appears to be effective in achieving corneal surface regularization |
| Ganesh et al. [24] | 2015 | India | Prospective | 6 | 19.5 | FILI accelerated collagen cross-linking | 100 µm | donut-shape | 6 | A clinical improvement in best corrected visual acuity was observed, along with a flattening of mean keratometry in both the 3-mm and 5-mm zones, accompanied by a reduction in higher-order aberrations |
| Mastropasqua et al. [23] | 2018 | Italy | / | 10 | / | Stromal lenticule addition keratoplasty | / | negative meniscus lamella | 6 | The negative meniscus-shaped lenticule addition induced corneal flattening, resulting in an improvement in visual acuity |
| Jadidi et al. [52] | 2018 | Iran | Prospective | 4 | 27.25 | FAISCG | 250 µm | central keratoconus- circular shape; inferior keratoconus- crescent shape; in asymmetric bow-tie keratoconus- round shape | 12 | They successfully achieved a reduction in Kmax, accompanied by improvements in both best corrected visual acuity and spherical equivalent |
| Jin et al. [26] | 2019 | China | Retrospective | 11 | 22.18 | Small-incision femtosecond laser–assisted intracorneal concave lenticule implantation | 160 µm | concave | 24 | The SFII group demonstrated enhanced corneal regularization, leading to superior visual acuity outcomes within the same group |
| Doroodgar et al. [53] | 2020 | Iran | Prospective | 22 | / | Femtosecond laser with customized Stromal Lenticule Implantation | / | simple necklace or necklace-with-ring shape | / | An improvement was achieved in vision, topography, and refraction |
MS-SLAK, meniscus-shaped stromal lenticule addition keratoplasty; FILI, femtosecond intrastromal lenticular implantation; FAISCG, femtosecond-assisted intrastromal corneal graft; Kmax, maximum curvature power; SFII, small-incision femtosecond laser-assisted intracorneal concave lenticule implantation