H. G. Landau has characterized those integer-sequences S = (s1, s2, . . . , sn) which can arise as score-vectors in an ordinary roundrobin tournament among n contestants [17]. If s1 ≤ s2 ≤ · · · ≤ sn, the relevant conditions are expressed simply by the inequalities:

AIMS To investigate the effect of frequency of testing on the determination of visual field progression using pointwise linear regression (PLR). METHODS A "virtual eye" was developed to simulate series of sensitivities over time at a given point in the eye. The user can input the actual behaviour of the point (for example, stable or deteriorating steadily), and then a configurable amount of n...