Glaucoma patients are currently undergoing monitoring by community bas
ed optometrists as part of a randomised controlled trial of shared car
e. As part of this trial, the costs of monitoring these patients by co
mmunity optometrists are being calculated. Data were obtained from eig
ht practices for the 1993-1994 financial year. The average 'full' cost
of a 40 min appointment was calculated as pound 31.56. The average nu
mber of unbooked appointments for the month of October 1994 was 16 per
practice, which equated to 12, 40 min appointments. Once the number o
f unbooked appointments was surpassed for each practice, an average op
portunity cost of pound 54.00 was experienced per appointment. The par
ticipating optometrists were willing to accept a minimum fee of pound
26.03 for a small number of patient assessments but this rose to pound
43.16 for up to 100 glaucoma patients seen per annum.