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Table 1 Corneal radius, corneal curvature and corneal astigmatism are depicted depending on breed

From: Intraocular lens power calculation for the equine eye

Breed

horizontal corneal radius (mm)

vertical corneal radius (mm)

averaged corneal radius (mm)

K1 (D)

K2 (D)

Mean K (D)

corneal astigmatism (D)

Haflinger

16.06 ± 0.47

15.53 ± 0.40

15.79 ± 0.42

20.94 ± 0.62

21.66 ± 0.55

21.30 ± 0.56

0.72 ± 0.36

Friesian

16.94 ± 0.50

16.66 ± 0.49

16.80 ± 0.48

19.86 ± 0.61

20.19 ± 0.62

20.02 ± 0.60

0.34 ± 0.29

Pony

15.16 ± 1.12

14.76 ± 1.34

14.96 ± 1.22

22.29 ± 1.61

22.94 ± 1.95

22.61 ± 1.76

0.65 ± 0.61

Shetland pony

14.46 ± 0.62

13.89 ± 0.57

14.18 ± 0.57

23.30 ± 1.00

24.25 ± 0.97

23.77 ± 0.94

0.95 ± 0.58

Warmblood

16.45 ± 0.66

15.99 ± 0.74

16.22 ± 0.69

20.46 ± 0.84

21.06 ± 0.96

20.76 ± 0.88

0.60 ± 0.35