Eye optical system 1. Optical power of the cornca: Feornea = F, + F = Clary fibers R. R. F- optical power of the cornea front surface, D; F, - optical power of the cornea back surface, D; R - radius of curvature of the comea front surface, m; Vieous hunor Compa Lene R, - radius of curvature of the comea back surface, Fo m; n1 ambient refraction index (for air n1 = 1 and for water n, = 1.33); n2 - cornea refraction index; n - aqueous humour refraction index. 2. Optical power of the erystalline lens: Ferystaline lens =+F, = -Opto nerve Аак humor Scara F - optical power of the crystalline lens front surface, D; F, - optical power of the crystalline lens back surface, D; R - radius of curvature of the crystalline lens front surface, m; R, - radius of curvature of the crystalline lens back surface, m; n - aqueous humour refraction index; n, - crystalline lens refraction index; n; - vitreous humor refraction index. Table - Parameters for the Eye Radius, mm Index of Front Back refraction n, =1.38 n4 =1.4 R = 7.8 Ramaz =10 Ramin =6 Aqueous humour and vitreous humor R = 7.3 Ramar = 6 Remis =5.5 Cornea Crystalline lens (Fmin) Crystalline lens (Fm) s 1.33 3. Optical power of eye: F= Farneg + Feristalline lens 4. Lens equation: 1 1. 1 Согпea Lens S- lens focal length (m); F- lens optical power (D); p - distance from the object to the lens or object distance (m); q - distance from the image to the lens or image distance (m). 5. Height of image on the retina: H =- H - height of image on the retina, m; h - height of object, m; q - image distance (for human eye on the average is equal to 1.5 cm), m; p - distance of the object to optical system of the eye, m. 6. Lens magnification: н H- image height (m); h - object height (m), p- object distance (m); g - image distance (m). 7. Law of refraction: nisine, = nastnez 2. (a) Using table data presented in the text, calculate the focusing power Fmin Oof the crystalline lens in the case when eye is focused to view distant objects. (b) Knowing that focusing power of the cornea is Feornea = 42 D, calculate minimum focusing power of the eye. (c) Find what if the eye focal length in this case. case.
Eye optical system 1. Optical power of the cornca: Feornea = F, + F = Clary fibers R. R. F- optical power of the cornea front surface, D; F, - optical power of the cornea back surface, D; R - radius of curvature of the comea front surface, m; Vieous hunor Compa Lene R, - radius of curvature of the comea back surface, Fo m; n1 ambient refraction index (for air n1 = 1 and for water n, = 1.33); n2 - cornea refraction index; n - aqueous humour refraction index. 2. Optical power of the erystalline lens: Ferystaline lens =+F, = -Opto nerve Аак humor Scara F - optical power of the crystalline lens front surface, D; F, - optical power of the crystalline lens back surface, D; R - radius of curvature of the crystalline lens front surface, m; R, - radius of curvature of the crystalline lens back surface, m; n - aqueous humour refraction index; n, - crystalline lens refraction index; n; - vitreous humor refraction index. Table - Parameters for the Eye Radius, mm Index of Front Back refraction n, =1.38 n4 =1.4 R = 7.8 Ramaz =10 Ramin =6 Aqueous humour and vitreous humor R = 7.3 Ramar = 6 Remis =5.5 Cornea Crystalline lens (Fmin) Crystalline lens (Fm) s 1.33 3. Optical power of eye: F= Farneg + Feristalline lens 4. Lens equation: 1 1. 1 Согпea Lens S- lens focal length (m); F- lens optical power (D); p - distance from the object to the lens or object distance (m); q - distance from the image to the lens or image distance (m). 5. Height of image on the retina: H =- H - height of image on the retina, m; h - height of object, m; q - image distance (for human eye on the average is equal to 1.5 cm), m; p - distance of the object to optical system of the eye, m. 6. Lens magnification: н H- image height (m); h - object height (m), p- object distance (m); g - image distance (m). 7. Law of refraction: nisine, = nastnez 2. (a) Using table data presented in the text, calculate the focusing power Fmin Oof the crystalline lens in the case when eye is focused to view distant objects. (b) Knowing that focusing power of the cornea is Feornea = 42 D, calculate minimum focusing power of the eye. (c) Find what if the eye focal length in this case. case.
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Transcribed Image Text:Eye optical system
1. Optical power of the cornca:
Feornea = F, + F =
Clary fibers
R.
R.
F- optical power of the cornea front surface, D; F,
- optical power of the cornea back surface, D; R -
radius of curvature of the comea front surface, m;
Vieous hunor
Compa
Lene
R, - radius of curvature of the comea back surface,
Fo
m; n1
ambient refraction index (for air n1 = 1 and
for water n, = 1.33); n2 - cornea refraction index;
n - aqueous humour refraction index.
2. Optical power of the erystalline lens:
Ferystaline lens =+F, =
-Opto nerve
Аак
humor
Scara
F - optical power of the crystalline lens front
surface, D; F, - optical power of the crystalline lens back surface, D; R - radius of curvature of
the crystalline lens front surface, m; R, - radius of curvature of the crystalline lens back surface, m;
n - aqueous humour refraction index; n, - crystalline lens refraction index; n; - vitreous humor
refraction index.
Table - Parameters for the Eye
Radius, mm
Index of
Front
Back
refraction
n, =1.38
n4 =1.4
R = 7.8
Ramaz =10
Ramin =6
Aqueous humour and vitreous humor
R = 7.3
Ramar = 6
Remis =5.5
Cornea
Crystalline lens (Fmin)
Crystalline lens (Fm)
s 1.33
3. Optical power of eye:
F= Farneg + Feristalline lens
4. Lens equation:
1 1. 1
Согпea
Lens
S- lens focal length (m); F- lens optical power (D); p
- distance from the object to the lens or object distance
(m); q - distance from the image to the lens or image
distance (m).
5. Height of image on the retina:
H =-
H - height of image on the retina, m; h - height of object, m; q - image distance (for human eye on
the average is equal to 1.5 cm), m; p - distance of the object to optical system of the eye, m.
6. Lens magnification:
н
H- image height (m); h - object height (m), p- object distance (m); g - image distance (m).
7. Law of refraction:
nisine, = nastnez
Transcribed Image Text:2. (a) Using table data presented in the text, calculate the focusing power Fmin Oof the crystalline
lens in the case when eye is focused to view distant objects. (b) Knowing that focusing power of the
cornea is Feornea = 42 D, calculate minimum focusing power of the eye. (c) Find what if the eye
focal length in this case.
case.
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