Nbeo Optics Part 1

Front 1

aperture stop correlate in object space

Back 1

entrance pupil

Front 2

aperture stop correlate in image space

Back 2

exit pupil

Front 3

physical stop which limits amt of light

Back 3

aperture stop

Front 4

ray from the object to the edge of aperture stop

Back 4

marginal ray

Front 5

ray from the object to the center of aperture stop

Back 5

chief ray

Front 6

imaginary line running through the centers of curvatures of all optical elements in the eye

Back 6

optic axis

Front 7

real line normal to the anterior surface of the cornea and passing through the entrance pupil, real pupil, and center of curvature

Back 7

pupillary axis

Front 8

visual axis

Back 8

imaginary straight line from the point of fixation through the nodal point to the fovea

Front 9

line of sight

Back 9

real straight line connecting the point of fixation with the center of the entrance pupil

Front 10

fixation axis

Back 10

imaginary straight line connecting the point of fixation with the center of fixation

Front 11

Mnemonic to remember angles for different axis

Back 11

I I I R R
F O V P L
G A K L

Front 12

Purkinje im #1

Back 12

Brightest, formed by anterior cornea

Front 13

units for luminous power

Back 13

lumens

Front 14

units for luminous intensity (I)

Back 14

lumens/steradian
candelas

Front 15

units for luminance (L)

Back 15

candelas/sq m
foot lamberts

Front 16

units for illuminance (E)

Back 16

lumens/ sq m
foot candels

Front 17

Law of Illumination

Back 17

E=I/d^2

(cosine law E=I / d^2cosx)

Front 18

Lambert's cosine law of diffuse reflection

Back 18

Intensity (I)
I=In(CosX)
X (in degrees) is measured from the normal

Front 19

Purkinje img # 1 is formed by

Back 19

ant cornea

Front 20

Purkinje img # 2 is formed by

Back 20

posterior cornea

Front 21

Purkinje img # 3 is formed by

Back 21

ant lens

Front 22

Purkinje img # 4 is formed by

Back 22

post lens

Front 23

which purkinje img is inverted and smallest

Back 23

4

Front 24

which purkinje img is largest but dimmest

Back 24

3

Front 25

which purkinje img is formed by reflection, refraction?

Back 25

reflect: 1
refraction: 2-6

Front 26

Zernike polynomials:
Defocus is which term

Back 26

4

Front 27

Zernike polynomials:
Astigmatism is which term

Back 27

3 and 5

Front 28

Zernike polynomials:
coma is which term

Back 28

7

Front 29

Zernike polynomials:
spherical aberration is which term

Back 29

12

Front 30

Zernike polynomials:
Defocus is which term

Back 30

4

Front 31

Zernike polynomials:
Astigmatism is which term

Back 31

3 and 5

Front 32

Zernike polynomials:
coma is which term

Back 32

7

Front 33

Zernike polynomials:
spherical aberration is which term

Back 33

12

Front 34

Anything in a fixed retinal location is not seen, it is due to

Back 34

trochsler fading
(thats why we dont see our BV)
ob can be viewed with rapidly moving light eg oscope)

Front 35

"worm like bright spots" seen with bright blue background (short wavelenght) is due to

Back 35

capillary circulation due to white blood cells

Front 36

Haidinger's Brush is seen when

Back 36

looking in blue plane polarized light

Front 37

blue arcs due to

Back 37

secondary stimulation of neighboring cells by the action currents in the initial optic nerve fibers

Front 38

catoptric images refer to images that are formed by

Back 38

reflection

Front 39

dioptric images refer to images that are formed by

Back 39

refraction