Average measurements

Question 1

What are the vertical and horizontal dimensions?

Answer 1

Vertical=11.5 mm
Horizontal=12.5 mm
At birth, horizontal=9.5-10.5 mm (reaches adult size by age 2)

Question 2

Central and peripheral thicknesses of the cornea? Which part is thinnest? Which part is thickest?

Answer 2

Central=550 microns
Peripheral=1000 microns
Inferotemporal paracentral thinnest
Superior paracentral thickest

Question 3

Radius of curvature for anterior and posterior surfaces?

Answer 3

Anterior=7.8 mm

Posterior=6.2-6.8 mm

Question 4

Power of anterior and posterior surfaces? Total power and % of eye’s total power?

Answer 4

Anterior=49D
Posterior=-6D
Total=43D (75% of total power of eye)

Question 5

Refractive index?

Answer 5

1.36