Fig. 3: VRS pain scale of the two transepithelial PRK techniques.

Comparison of the VRS pain scale between the two-step PTK-PRK and the single-step TE-PRK. (PTK-PRK Phototherapeutic keratectomy-photorefractive keratectomy, TE-PRK Transepithelial photorefractive keratectomy, VRS Verbal rating scale).