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Table 4 Follow-up results for the five subjects

From: Multiple phototherapeutic keratectomy treatments in a Chinese pedigree with corneal dystrophy and an R124L mutation: a 20-year observational study

Number Eye Number of PTK treatments Duration of follow-up (years) 3 months after the last PTK Final follow-up in 2017
BCVA (LogMAR) Thinnest thickness of the cornea (μm) BCVA (LogMAR) Thinnest thickness of the cornea (μm) Subjective scoring Remarks
I2 OD 2 20 0.70 * * 8 N1
OS 2 20 0.52 * * N1
II1 OD 4 21 0.30 Hand movement 284 10 Y1
OS 3 21 0.40 393 0.70 370 Y2
II3 OD 3 16 0.30 380 * * 8 N2
OS 3 21 0.30 291 0.11 242 Y3
II5 OD 3 20 0.40 * * 9 N3
OS 3 21 0.30 0.52 395 Y4
III1 OD 2 19 0.30 * * 8 N4
OS 3 17 0.40 422 0.52 501 Y5
Average 2.80 ± 0.63 20 0.39 ± 0.12 371.50 ± 56.47 358.40 ± 101.11 8.60 ± 0.89
  1. BCVA = best-corrected visual acuity, PKP = penetrating keratoplasty, PTK = phototherapeutic keratectomy
  2. : Corneal topography results had low reliability. *: Data not available (reasons are represented by N1–4). N1: This follow-up was performed at the patient’s home because of difficulty in mobility. N2–4: These three eyes were not included in the final follow-up because PKP, PTK combined with epi-aphakia, and PTK combined with epi-aphakia were performed in each eye in the 16th (N2), 20th (N3), and 19th (N4) year of follow-up, respectively. Y1–5: the time points of the final follow-up were 5, 3, 3, 3, and 5 years after the last PTK, respectively