Table 2

Comparability of eyes at the start of therapy

Drug allocated (n = no of eyes)
Timolol (n = 96)Betaxolol (n = 96)Carteolol (n = 88)
% left side514945.5
Mean disc grading ratio (SE)0.57 (0.015)0.55 (0.016)0.54 (0.015)
Mean IOP mm Hg (SE)27.74 (0.48)27.90 (0.43)27.78 (0.46)
Mean visual acuity (SE)2.64 (0.15)2.66 (0.15)2.47 (0.16)
Mean field loss grade (SE) 1.11 (0.14)1.07 (0.14)0.87 (0.13)
Mean MD (SE)−4.91 (0.63)−4.33 (0.67)−3.76 (0.58)
Mean CPSD (SE)3.57 (0.40)3.87 (0.36)3.34 (0.37)
  • Cup to disc ratio.

  • Visual acuity grading 1 = 6/5, 2 = 6/0, 3 = 6/9, 4 = 6/12, 5 = 6/18, etc.

  • Field loss grading 0—5 0 = none, 5 = severe.