Optics for VO 2

Question 1

Why consider image size?

Answer 1

• Leads to important results about blur
• Gives insight into the magnification produced by diff corrections (Spectacles, contact lenses and refractive surgery)
• Has clinical relevance to aniseikonia.

Question 2

What is Traverse Magnification?

Answer 2

Ratio of image height to object height

Question 3

For real objects forming real images on it near the retina, the magnification is:

Answer 3

• negative, therefore image is inverted

- «1 therefore retinal image is much smaller than the object

Question 4

Nodal Points (N,N)

Answer 4

=conjugate points along the optical axis of unit angular magnification
- means a ray directed at the first nodal point leaves the system undeviated from the second

Question 5

Principal Points, P, P’

Answer 5

=conjugate points along the optical axis of unit angular transverse magnification
- incident ray height at first principal plane is same as height of exiting ray on second principal plane