23 Questions
Which of the following is true about the amplitude of a wave of light?
Amplitude is the maximum value of the field generated by the propagating wave
What determines the wavelength of a wave of light?
Frequency
Which part of the visual photopigment determines the wavelength of light that the photopigment will absorb?
Opsin
Which of the following is NOT a factor that affects accommodation in vertebrates?
Having two or more separate optic pathways with different refractive powers
What is the refractive power of the human tear film?
43D
What is the refractive power of the cornea?
5D
What is the refractive index of the lens in humans?
1.41
Which muscle is responsible for lens displacement in cats and dogs?
Meridional muscle
Which of the following statements is true about the refractive properties of light in a prism?
Red light refracts more than blue light
Which animals lack accommodation?
Rodents and ungulates
Which of the following animals have multifocal lenses consisting of concentric rings of different refractive properties?
Fish
Which muscle in chickens is responsible for flattening the peripheral cornea and increasing the curvature in the center?
Anterior ciliary muscle
Which of the following animals have miotic pupils that are not round?
Cats
What is the purpose of refraction and accommodation in the eye?
To focus an image on the outer segments of the photoreceptors
Which of the following animals have a round pupil with a monofocal lens?
Tigers
Which of the following is NOT a property of light that is measured using photometers?
Brightness
Which of the following is true about the wavelength range that humans can see?
Humans can see wavelengths between 390-1400nm
Which type of lens causes light rays to spread or diverge?
Concave lens
Which of the following statements about the refractory power of a lens is true?
The refractory power of a lens decreases as its curvature increases
Which of the following is NOT a cause of astigmatism in animals?
Myopia below horizontal
What is the purpose of a cylindrical lens in correcting astigmatism?
To focus light entering the vertical meridian
What is the role of the pupil in reducing spherical aberrations?
To create a more focused image in bright light
What causes chromatic aberrations in the eye?
The refractive index of the eye is wavelength dependent
Test your knowledge on parasympathetic stimulation and lens displacement in cats and dogs. Learn about the differences in accommodation and depth perception between these two animals.
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