Table 1. Estimates of visual acuity in dogs.

Breed	Sample size	Acuity (cpd)	Light intensity	Method
Mixed breed	1	4–6.2	0.1–37 (lux)	Behaviour [15]
Mixed breed/ Beagle	4	11.6–12.6	86 (cd m-2)	Electro-physiology [14]
Beagle	4	2.5–4.3	86 (cd m-2)	Electro-physiology [13]
Beagle	3	7.1–9.5	73 (cd m-2)	Electro-physiology [12]
Mixed breed	18	25–46	-	Anatomical [5]

Sample size is for individuals except for the last row where sample size denotes the number of eyes from which cone densities were calculated and used to calculate an anatomical acuity estimate.