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Analysis 1.2. Comparison 1 Deep anterior lamellar keratoplasty (DALK) versus penetrating keratoplasty (PK), Outcome 2 Postoperative BCVA (varied follow-up times, post-suture removal) (LogMAR).. .. .. .. .. .. Analysis 1.3. Comparison 1 Deep anterior lamellar keratoplasty (DALK) versus penetrating keratoplasty (PK), Outcome 3 Postoperative functional BCVA achieved (varied follow-up times, post-suture removal).. .. .. .. . Analysis 1.4. Comparison 1 Deep anterior lamellar keratoplasty (DALK) versus penetrating keratoplasty (PK), Outcome 4 Postoperative UCVA (varied follow-up times, post-suture removal) (LogMAR).. .. .. .. .. .. Analysis 1.5. Comparison 1 Deep anterior lamellar keratoplasty (DALK) versus penetrating keratoplasty (PK), Outcome 5 Postoperative functional UCVA achieved (varied follow-up times, post-suture removal).. .. .. .. . Analysis 1.6. Comparison 1 Deep anterior lamellar keratoplasty (DALK) versus penetrating keratoplasty (PK), Outcome 6 Postoperative keratometric astigmatism (varied follow-up times, post-suture removal) (D).. .. .. .. Analysis 1.7. Comparison 1 Deep anterior lamellar keratoplasty (DALK) versus penetrating keratoplasty (PK), Outcome 7 Postoperative spherical equivalent (varied follow-up times, post-suture removal) (D).. .. .. .. .. Analysis 1.8. Comparison 1 Deep anterior lamellar keratoplasty (DALK) versus penetrating keratoplasty (PK), Outcome 8 Postoperative keratometric astigmatism (12 months