Drug name Brimonidine Tartrate Timolol Maleate AV ± SD  mg/ml AV ± SD  % AV ± SD  mg/ml AV ± SD  % Repeatability 19.98 ± 0.19 99.88 ± 0.94% 49.90 ± 0.50 99.81 ± 1.00% Intermediate precision 19.99 ± 0.32 99.9 ± 1.59% 49.78 ± 0.84 99.56 ± 1.67% Accuracy & Recovery % 80% 15.99 ± 0.13 99.94 ± 0.78% 40.21 ± 0.43 100.53 ± 1.06% 100% 20.06 ± 0.15 100.32 ± 0.75% 50.01 ± 0.51 100.01 ± 1.02% 120% 24.20 ± 0.19 100.83 ± 0.80% 60.34 ± 0.43 100.57 ± 0.72%

Table 1: Repeatability and Intermediate precision and Accuracy (Recovery %) of Brimonidine Tartrate and Timolol Maleate respectively.