Prisms

Question 1

P=C/D

Answer 1

P= Prism power (PD)
C= Displacement (cm)
D= Distance from prism (m)

Question 2

Prism Orientation

Answer 2

BU= Base Up
BO= Base Out
BD= Base Down
BI= Base In

Question 3

Lens that is minus power, apex to apex prism and concave

Answer 3

Diverging

Question 4

Lens that is plus power, base to base prism and convex

Answer 4

Converging

Question 5

P=1/f

Answer 5

P= Vergence Power (Diopter)
f= distance of focal length (m)

Question 6

U=1/u

Answer 6

U= Vergence of object rays (D)
u= distance of object from lens (m)

Question 7

V=1/v

Answer 7

V= Vergence of image rays (D)
v= distance of image from lens (m)

Question 8

U+P=V

Answer 8

U= Vergence power of object rays (D)
P= Power of lens in Diopters (D)
V= Vergence power of image rays (D)