Optics of the eye

Question 1

Calculate accommodation power

Answer 1

D = 1/On - 1/Of
*convert to m

Question 2

Calculate visual acuity

Answer 2

a = (landolt ring gap/ longest d of clear)* 180/pi * 60

visual acuity = 1/a
* convert to mm

Question 3

Calculate receptor density

Answer 3

1 / (17* landolt ring gap/longest d of clear)^2

*Answer in mm
Tells how many light receptors in our eyes

Question 4

Calculate the diameter of the blind spot

Answer 4

(17 x 60)/eye d reapp - (17 x 60)/eye d disapp

*answer in mm

Question 5

Calculate the distance of blind spot from fovea centralis

Answer 5

[(1760/d eye dot reapp) + (1760/d eye dot disapp)] / 2

*Answer in mm