Table 4.

Criteria to distinguish responders (R) and non-responders (NR) to photodynamic therapy with verteporfin (PTD-V) on the basis of the total number of PDT-V scheduled in each patient during the 24-month follow-up period (TN-PDT-V), and change of best-corrected visual acuity from baseline to final visit (∆-BCVA). PTD-V, photodynamic therapy with verteporfin; TN-PDT-V, total number of photodynamic therapies with verteporfin; BCVA, best-corrected visual acuity; ∆-BCVA, change of best-corrected visual acuity; logMAR, logarithm of the minimum angle of resolution.

	PDT-V responder (R)	PDT-V non-responder (NR)
TN-PDT-V	from 1 to 4	from 5 to 8
∆-BCVA – logMAR	from −0.4 to 0.1	from 0.2 to 0.7