Sibling

Age (years)

Sex

Post-refraction

Spheres

Cylinders

Axes

Spherical equivalents

Astigmatism type

OD

OS

OD

OS

OD

OS

OD

OS

OD

OS

1

9

Male

+0.50

+0.50

−3.00

−3.50

30

160

−1.00

−1.25

With the rule

With the rule

2

14

Male

0.00

0.00

−2.00

−2.00

180

180

−1.00

−1.00

With the rule

With the rule

3

18

Female

−2.50

−3.00

−2.00

−2.50

180

180

−3.50

−4.25

With the rule

With the rule

4

21

Female

−3.50

−2.00

−3.00

−2.50

20

170

−5.00

−3.25

With the rule

With the rule