This document contains a 25 question quiz on optics of the eye. It covers topics like the structures of the eye, their functions, refractive errors like myopia and hypermetropia, accommodation, and other eye-related concepts like cataracts and glaucoma. The questions are multiple choice with one right answer out of 5 options for each question.

1. OPTICS OF EYE
BCQs = 25
TIME = 50mins
MARKS = 50
Dr Saadiayh Rao
Depart of Physiology, DIMC

2. Light travels faster through:
a. Air
b. Liquids
c. Solids
d. Glass
e. Water

3. Photo receptors are sensitive only to
wavelengths b/w:
a. 100-300nm
b. 300-800nm
c. 400-700nm
d. 600-900nm
e. 100-1000nm

4. Light with longest wavelength
is:
a. Violet
b. Blue
c. Red
d. Green
e. Yellow

5. Most of refraction occurs at:
a. Ant surface of cornea
b. Ant surface of lens
c. Ant surface of retina
d. Post surface of cornea
e. Post surface of lens

6. Refractive ability of which of the
following structure can be changed:
a. Sclera
b. Cornea
c. Iris
d. Lens
e. Retina

7. The total refractive power of the
reduced eye is:
a. 80
b. 75
c. 69
d. 59
e. 49

8. Following statements are true about
eye muscles EXCEPT:
a. Medial rectus is supplied by abducent nerve
b. Lateral rectus is supplied by abducent nerve
c. Medial rectus is supplied by oculomotor nerve
d. Superior oblique is supplied by trochlear nerve
e. Inferior oblique causes elevation of eye

9. Sclera:
a. Forms ant 1/3 of eyeball
b. Is composed of dense connective tissues
c. Is highly vascular layer
d. Does not protect eyeball
e. Is pierced by ciliary artery

10. Cornea:
a. Is a semi transparent layer
b. Forms ant 1/3 of eyeball
c. Is highly vascular layer
d. Is nourished by lymphatics
e. Protect eye from light entry

11. In Astigmatism, the curvature of
which of the following structure is
uneven:
a. Sclera
b. Cornea
c. Iris
d. Lens
e. Retina

12. Factor dilating pupil is:
a. Near vision
b. Emotions
c. Sleep
d. Exposure to Light
e. Parasympathetic stimulation

13. Factor constricting pupil is:
a. Distant vision
b. Exposure to dark
c. Emotions
d. Sleep
e. Sympathetic stimulation

14. Lens:
a. Is a transparent biconcave elastic structure
b. Lies b/w iris & vitreous body
c. Aqueous humor fills the cavity behind it
d. Is highly vascular structure
e. Has more refractive ability than cornea

15. Cataract:
a. An opaque area in eye lens
b. Occurs due to defective lipids in lens
c. Treated by topical medicines
d. Occurs in old age only
e. Is due to increased amount of aqueous humor

16. Most of the aqueous humor is
secreted by:
a. Cornea
b. Lens
c. Iris
d. Choroid plexus
e. Ciliary process

17. Aqueous humor is formed by the
process of:
a. Active secretion
b. Osmosis
c. Passive diffusion
d. Facilitated diffusion
e. Bulk transport

18. Aqueous humor contains all of the
following EXCEPT:
a. Water
b. Sodium
c. Fibrinogen
d. Hyaluronic acid
e. Ascorbic acid

19. Tonometry is a process of
measuring:
a. CSF pressure in ventricles
b. CSF pressure in spinal cord
c. Blood pressure in heart
d. Pleural pressure
e. Intraocular pressure

20. Retina:
a. Is thin delicate outer layer of eyeball
b. Extends posteriorly to ciliary body
c. Is organized in three layers
d. Rods & cones are present in neural portion
e. Fovea is the region where optic nerve leave
retina

21. Emmetropia:
a. Is normal eye
b. Occurs in old age
c. Corrected by cylindrical lens
d. Corrected by concave lens
e. Corrected by convex lens

22. Presbyopia:
a. Is more common in young age
b. Occurs due to increase in range of
accommodation
c. Occurs in old age
d. Treated by cylindrical lens
e. Is normal eye

23. When the eye is accommodated for
near vision:
a. Ciliary muscles relax
b. Pupil dilate
c. Convergence of eyes
d. Image of the object is focused in front of retina
e. Image of the object is focused behind the retina

24. Stimulation of parasympathetic
nerves to eye, causes:
a. Relaxation of ciliary muscles
b. Contraction of ciliary muscles
c. Dilation of pupil
d. Accommodation of eye for far vision
e. Decrease in lens power

25. A myopic person:
a. Needs bifocal lens
b. Needs cylindrical lens
c. Needs convex lens
d. Is unable to see the far object clearly
e. Is unable to see the near object clearly

26. The term hypermetropia means:
a. Eyes with normal vision
b. Difficulty in focusing near object
c. Difficulty in focusing far object
d. Failure of accommodation of eyes
e. Increased intra ocular pressure