Human Eye Quiz
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What type of lens creates the image seen in the eyeglasses?
A. convex
B. concave
C. reflection
D. plane
Crystalline lens of people at old age becomes milky and cloudy. This condition is called
A. myopia
B. lever
C. cataract
D. presbyopia
Reason behind advance sunrise and delayed sunset
A. atmospheric refraction
B. total internal reflection
C. dispersion
D. reflection
The focal length of the eye lens increases when eye muscles
A. are relaxed and lens becomes thinner
B. contract and lens becomes thicker
C. are relaxed and lens becomes thicker
D. contract and lens becomes thinner
Which parts of your eye are transparent?
A. retina
B. optic nerve
C. cornea and lens
D. iris
A dark muscular membrane which controls size of pupil
A. eye
B. iris
C. cornea
D. retina
The part of your eye that gives it its color. It is a muscle that controls the size of your pupil.
A. cornea
B. lens
C. pupi
D. iris
Least distance of distinct vision for normal eye is
A. 25 cm
B. 50 cm
C. 75 cm
D. infinity
What type of lens is used in the shown instrument?
A. concave lens
B. convex lens
C. reflection lens
D. reduction lens
Myopia and Hypermetropia can be corrected by
A. Concave and plano-convex lens
B. Concave and convex lens
C. Convex and concave lens
D. Plano-concave lens for both defects.
minimum focal length of eye is…………………..
A. 2.25cm
B. 2.27cm
C. 2.25mm
D. 2.27mm
The shape of eye-ball is nearly _________________
A. Elliptical
B. Oval
C. Circular
D. Spherical
The person who is suffering from _____________ requires bi-focal lens.
A. (a) Hypermetropia
B. (b) Myopia
C. both option(a) and (b)
D. none of these
Twinkling of stars is due to atmospheric
A. dispersion of light by water droplets
B. refraction of light by different layers of varying refractive indices
C. scattering of light by dust particles
D. internal reflection of light by clouds
This part of the eye carries the message from your eye to the part of your brain that controls vision.
A. cornea
B. lens
C. optic nerve
D. retina
