Sense Organs

Question 1

Accommodation

Answer 1

The ability of the eye to change its focus from distant near objects.

Question 2

Anterior chamber

Answer 2

Area behind the cornea and in front of the lens and iris. It contains aqueous humor. 

Question 3

Aqueous humour

Answer 3

Fluid produced by the celery body and found in the anterior chamber. Gives the eye it’s shape and nourishes the cornea and lens by supplying nutrition.

Question 4

Biconvex

Answer 4

Consisting of two surfaces that are rounded, elevated, and curved evenly like part of a sphere. The lens of the eye is a biconvex body.

Question 5

Choriod

Answer 5

Thin layer of tissue that is part of the middle layer of the wall of the eye, between the sclera and the retina. Filled with blood vessels that bring oxygen and nutrients to the eye. 

Question 6

Ciliary body 

Answer 6

A part of the middle layer of the wall of the eye found behind the iris and includes the ring shaped muscle that changes the shape of the lens when the eye focusses. Makes clear fluid that feels the space between the cornea and iris.

Question 7

Cone

Answer 7

Photo receptor cell in the retina that transforms light energy energy into nerve impulse. Responsible for colour and central vision.

Question 8

Conjunctiva

Answer 8

Delicate membrane lining the eyelids and covering the eyeball up to the cornea

Question 9

Cornea

Answer 9

Fibrous, transparent layer of clear tissue that extends over the anterior portion of the eyeball

Question 10

Fovea centralis

Answer 10

Tiny pit or depression in the retina that is the region of clearest vision

Question 11

Fundus of the eye

Answer 11

Posterior inner part of the eye, visualized with an ophthalmoscope 

Question 12

Iris

Answer 12

Pigmented layer that opens and closes to allow more or less light into the eye

Question 13

Lens

Answer 13

Transparent by convex body behind the pupil of the eye. light raise to bring them into focus on the retina

Question 14

Macula

Answer 14

 Small oval region on the retina near the optic disc, contains the fovea centralis, which is the areas clearest vision 

Question 15

Optic chiasm

Answer 15

Point on which optic nerve fibres cross in the brain

Question 16

Optic disc

Answer 16

Region at the back of the eye where the optic nerve meets the retina. It is the blind spot of the eye because it only contains nerve fibers, no rods or cones, and is thus insensitive to light.

Question 17

Optic nerve

Answer 17

Cranial nerve carrying impulses from the retina to the brain

Question 18

Pupil

Answer 18

Central opening of the eye, surrounded by the iris through which light rays pass. It appears dark.

Question 19

Refraction

Answer 19

Bending of light raised by the cornea lens and fluids of the eye to bring the rays into focus on the retina.

Question 20

Retina

Answer 20

Light sensitive nerve cell layer of the eye containing photo receptor cells. Rods and cones.

Question 21

Rod

Answer 21

Photo receptor cell of the retina, essential for vision and low light and peripheral vision

Question 22

Sclera

Answer 22

Tough white outer coat of the eyeball

Question 23

Thalamus

Answer 23

Relay centre of the brain. Optic nerve fibres pass through the thalamus on their way to the cerebral cortex. 

Question 24

Vitreous humour

Answer 24

Soft jelly like material behind the lens in the vitreous chamber helps, maintain the shape of the eyeball

Question 25

Aque/o

Answer 25

Water

Question 26

Blephar/o

Answer 26

Eyelid

Question 27

Conjunctiv/o

Answer 27

Conjunctiva, pink eye When blood vessels dilate

Question 28

Cor/o

Answer 28

Pupil

Question 29

Cycl/o

Answer 29

Ciliary body or muscle of the eye

Question 30

Dacry/o

Answer 30

Tears, tear duct

Question 31

Ir/o, irid/o

Answer 31

Iris

Question 32

Kerat/o

Answer 32

Cornea (keratitis )

Question 33

Lacrim/o

Answer 33

Tears

Question 34

Ocul/o

Answer 34

Eye

Question 35

Ophthalm/o

Answer 35

Eye

Question 36

Opt/o, optic/o

Answer 36

Eye, vision

Question 37

Palpebr/o

Answer 37

Eyelid

Question 38

Papill/o

Answer 38

Optic disc 

Question 39

Phac/o, phak/o

Answer 39

Lens of the eye

Question 40

Pupill/o

Answer 40

Pupil

Question 41

Scler/o

Answer 41

Sclera (white of the eye )

Question 42

Uve/o

Answer 42

Uvea ; vascular layer of the eye. iris, ciliary body and choroid 

Question 43

Vitre/o

Answer 43

Glassy

Question 44

Ambly/o

Answer 44

Dull, dim

Question 45

Ambly/o

Answer 45

Dull, dim

Question 46

Dipl/o

Answer 46

Double

Question 47

Dipl/o

Answer 47

Double

Question 48

Glauc/o

Answer 48

Gray

Question 49

Mi/o

Answer 49

Smaller, less

Question 50

Mydr/o

Answer 50

Widen, enlarge

Question 51

Nyct/o

Answer 51

Night

Question 52

Phot/o

Answer 52

Light

Question 53

Presby/o

Answer 53

Old age

Question 54

Scot/o

Answer 54

Darkness

Question 55

Xer/o

Answer 55

Dry

Question 56

-opia

Answer 56

Vision

Question 57

-opsia

Answer 57

Vision

Question 58

-tropia

Answer 58

To turn

Question 59

Astigmatism

Answer 59

Defective curvature of the cornea or lens of the eye.

Question 60

Hyperopia. (Hypermetropia)

Answer 60

Farsightedness.

Question 61

Myopia

Answer 61

Nearsightedness 

Question 62

Metic

Answer 62

A drug that contracts the pupil

Question 63

Presbyopia

Answer 63

Impairment of vision as a result of old age 

Question 64

Cataract

Answer 64

Clouding of the lens, causing decreased division. A type of degenerative eye disease. 

Question 65

Chalazion

Answer 65

Small, hard cystic mass on the eyelid. formed as a result of chronic inflammation of a sebaceous gland along the margin of the eyelid

Question 66

Diabetic retinopathy

Answer 66

Disease of the retina caused by diabetes mellitus 

Question 67

Glaucoma

Answer 67

Increased intraocular pressure results in damage to the retina and optic nerve with loss of vision 

Question 68

Trabeculoplasty

Answer 68

Laser therapy for chronic Open angle, Glockoma

Question 69

Trabecul/o

Answer 69

Small beam, rod, or plank of wood

Question 70

Chalazion

Answer 70

Granuloma formed around an inflamed sebaceous gland

Question 71

Dacryocystitis

Answer 71

Blockage inflammation, and infection of a nasolacrimal duct and lacrimal sack, causing redness and swelling in the region between the nose and lower lid 

Question 72

Ectropion

Answer 72

Outward sagging and eversion of the eyelid leading to improper lacrimation and corneal drying  and ulceration

Question 73

Entropion

Answer 73

Inversion of the eyelid, causing the lashes to rub against the eye. Corneal abrasion may result.

Question 74

Hordeolum (stye)

Answer 74

Small superficial white nodule along lid margin due to infection of a sebaceous gland 

Question 75

Ptosis

Answer 75

Drooping of upper lid margin from neuromuscular problems, or trauma

Question 76

Xanthelasma

Answer 76

Raised yellowish plaque on eyelid caused by lipid disorder

Question 77

Hordeolum (stye)

Answer 77

Localized, purulent, inflammatory, staphylococcal infection of a sebaceous oil producing gland in the eyelid

Question 78

Macular degeneration

Answer 78

Progressive damage to the macula of the retina.