Table 2: Estimated costs for in-person examination and pharmacy-based TO.

Item	Unit description	Cost per unit, $	Total cost, $
Capital costs* per year
Digital camera	1 retinal camera	17 458.50	4 032.45
Table lift	1 table lift	1 045.25	241.43
Software	1 software package	1 610.25	371.93
Carrying case	1 carrying case	1 299.50	300.15
Maintenance	Annual maintenance	460.00	460.00
Camera transportation costs per year
Van rental	1 cargo van	91.07	1 092.84
Fuel	1 L	1.27	76.26
Overhead costs† per year
Pharmacy overhead costs	Annual expenditures per square foot	155.00	775.00
Labour costs per patient
TO coordinator	Hourly wage‡	24.18	4.03§
Ophthalmic photographer	Hourly wage‡	24.18	6.05§
Grader (ophthalmologist)	Consultation per patient	31.66	31.66
Eye care specialist	Consultation per patient	51.10	51.10
Consumables per patient
Referral to retina specialist	Examination per patient	111.31	111.31
Dilation drops
1% tropicamide	Cost per unit (15 mL)	16.15	0.54
2.5% phenylephrine	Cost per unit (5 mL)	4.82	0.12
Chin covers	Cost per pack (500)	56.50	0.113

Note: TO = teleophthalmology.

*Annualized based on a 5-year life span and a 5% depreciation rate.

†Based on average annual pharmacy overhead expenditures for 5 square feet, adjusted to inflation.

‡Based on a part-time annual salary of $21 762.

§Part-time salary was extrapolated according to the number of patients per hour. Workload was estimated based on literature searches.