The aims of this study were to investigate whether half-letter width spacing in COMPlog algorithms had an adverse effect on agreement in patients with AMD with the ETDRS chart. Fifty adult participants with AMD took part with a median age of 86 years. All patients had six measurements of their visual acuity, two of which were with the ETDRS chart and the other three with the COMPlogC5 and C3. Most of the patients had wet AMD (44/50). The C5 and C3 scores showed no bias compared to the ETDRS. C5 measurements had equal test-retest variability to the ETDRS but the C3 were slightly more variable but 30s quicker. The authors conclude that both VA tests can be used with equally accurate results in patients with AMD.