Table 2.
Functional KTP.
| No. | Authors | Number of eyes | Method of KTP | Type of pigment material | Outcomes and FUT |
|---|---|---|---|---|---|
| 1 | Al-shymali et al. [39] | 9 functionally disabled eyes out of entire 136 eyes (6 eyes with aniridia, 2 eyes with albinism, 1 eye with iris cyst) | SMK, SAK | First GP, second GP and third generation CE mark pigments | Postoperative complications: 1 patient with pain while undergoing MRI in FU < 3 months and 12 eyes with organic complications in FU > 3 months (2-neovascularization, 6-colour fading and 7-change in colour in 2.4–14 years FU |
| 2 | Tone et al. [38] | 5 eyes with post-LPI dysphotopsias | MIK | An alcohol-based commercially available black tattoo pigment | Immediate postoperative relief in all symptoms of patients |
| 3 | Ricardo et al. [22] | 2 eyes with post PI symptoms | FAK | Black and brown tattoo pigments | Total elimination of symptoms, and no significant complications in 6–8 months FU |
| 4 | Alio et al. [15] | A case with unilateral Urrets-Zavalia syndrome | Double-intrastromal tunnel FAK | Mineral micronized black pigment | No postoperative complications in 12 months FU |
| 5 | Segal et al. [37] | 5 eyes with post PI symptoms | Intrastromal lamellar pocket technique | Commercially available black pigment | No major complications but postoperatively, all patients complained of mild irritation and/or photophobia, lasting from 2 days to 2 weeks |
| 6 | Alio et al. [13] | A case of essential iris atrophy | FAK | Mineral micronized pigment | No intraoperative or postoperative complications 12 months FU |
| 7 | Alio et al. [14] | 11 eyes with iris defects | MIK (8 patients), MIK + SAK (2 patients), FAK (1 patient) | Mineral micronized pigments | No major complications in any patients in 3–12 months FU |
| 8 | Gupta et al. [43] | Complicated PI | Intrastromal lamellar pocket technique | Black sterile marking ink | No complications in 12 months FU |
| 9 | Islam et al. [44] | Post PI symptoms | Corneal stromal pocket anterior to PI | Hydrazine hydrate solution | No complications in 20 months FU |
FUT follow-up time, GP generations of pigments, MIK manual intralamellar keratopigmentation, SAK superficial automated keratopigmentation, SMK superficial manual keratopigmentation, FAK femtosecond-assisted keratopigmentation, PI peripheral iridotomy