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39 Cards in this Set
- Front
- Back
aperture stop correlate in object space
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entrance pupil
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aperture stop correlate in image space
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exit pupil
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physical stop which limits amt of light
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aperture stop
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ray from the object to the edge of aperture stop
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marginal ray
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ray from the object to the center of aperture stop
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chief ray
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imaginary line running through the centers of curvatures of all optical elements in the eye
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optic axis
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real line normal to the anterior surface of the cornea and passing through the entrance pupil, real pupil, and center of curvature
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pupillary axis
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visual axis
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imaginary straight line from the point of fixation through the nodal point to the fovea
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line of sight
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real straight line connecting the point of fixation with the center of the entrance pupil
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fixation axis
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imaginary straight line connecting the point of fixation with the center of fixation
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Mnemonic to remember angles for different axis
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I I I R R
F O V P L G A K L |
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Purkinje im #1
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Brightest, formed by anterior cornea
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units for luminous power
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lumens
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units for luminous intensity (I)
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lumens/steradian
candelas |
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units for luminance (L)
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candelas/sq m
foot lamberts |
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units for illuminance (E)
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lumens/ sq m
foot candels |
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Law of Illumination
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E=I/d^2
(cosine law E=I / d^2cosx) |
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Lambert's cosine law of diffuse reflection
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Intensity (I)
I=In(CosX) X (in degrees) is measured from the normal |
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Purkinje img # 1 is formed by
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ant cornea
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Purkinje img # 2 is formed by
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posterior cornea
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Purkinje img # 3 is formed by
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ant lens
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Purkinje img # 4 is formed by
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post lens
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which purkinje img is inverted and smallest
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4
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which purkinje img is largest but dimmest
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3
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which purkinje img is formed by reflection, refraction?
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reflect: 1
refraction: 2-6 |
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Zernike polynomials:
Defocus is which term |
4
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Zernike polynomials:
Astigmatism is which term |
3 and 5
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Zernike polynomials:
coma is which term |
7
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Zernike polynomials:
spherical aberration is which term |
12
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Zernike polynomials:
Defocus is which term |
4
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Zernike polynomials:
Astigmatism is which term |
3 and 5
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Zernike polynomials:
coma is which term |
7
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Zernike polynomials:
spherical aberration is which term |
12
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Anything in a fixed retinal location is not seen, it is due to
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trochsler fading
(thats why we dont see our BV) ob can be viewed with rapidly moving light eg oscope) |
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"worm like bright spots" seen with bright blue background (short wavelenght) is due to
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capillary circulation due to white blood cells
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Haidinger's Brush is seen when
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looking in blue plane polarized light
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blue arcs due to
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secondary stimulation of neighboring cells by the action currents in the initial optic nerve fibers
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catoptric images refer to images that are formed by
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reflection
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dioptric images refer to images that are formed by
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refraction
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