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

Table 4 Follow-up results for the five subjects

Number	Eye	Number of PTK treatments	Duration of follow-up (years)	3 months after the last PTK		Final follow-up in 2017
Number	Eye	Number of PTK treatments	Duration of follow-up (years)	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
I2	OS	2	20	0.52	△	*	*	8	N1
II1	OD	4	21	0.30	△	Hand movement	284	10	Y1
II1	OS	3	21	0.40	393	0.70	370	10	Y2
II3	OD	3	16	0.30	380	*	*	8	N2
II3	OS	3	21	0.30	291	0.11	242	8	Y3
II5	OD	3	20	0.40	△	*	*	9	N3
II5	OS	3	21	0.30	△	0.52	395	9	Y4
III1	OD	2	19	0.30	△	*	*	8	N4
III1	OS	3	17	0.40	422	0.52	501	8	Y5
Average	–	2.80 ± 0.63	20	0.39 ± 0.12	371.50 ± 56.47	–	358.40 ± 101.11	8.60 ± 0.89	–

BCVA = best-corrected visual acuity, PKP = penetrating keratoplasty, PTK = phototherapeutic keratectomy
△: 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

ISSN: 1471-2415