Eye Anatomy and Physiology Quiz
Eye Anatomy and Physiology Quiz
Test your knowledge of eye anatomy and physiology with this comprehensive quiz consisting of 30 multiple-choice questions. Perfect for students, educators, and anyone interested in deepening their understanding of the eye's structure and fun
Key Features:
- 30 carefully crafted questions
- Covers various aspects of ocular health and anatomy
- Multiple-choice format with instant feedback
Aqueous humor
Removes waste like co2 and lactate and contributes to the shape of the eye
Contributes to the shape of the eye
Removes waste like co2 and lactate
Nourishes vascular structures with oxygen and amino acids
Nourishes avascular structures like iris, sclera and conjunctiva with o2 and amino acids.
Identify the correct statement
Rods are located in the center of the retina, and gives us our night vision
Rods gives us our night vision but cannot distinguish colour
Cones are located in the center of the retina, and gives us our night vision
Rods let us perceive colour in daylight conditions
Rods are located in the peripheral retina and gives us our daylight vision
Identify the FALSE statement about Bruchs membrane
Increases in thickness with age
Contains the basement membrane of the choriocapillaris
It forms a loose junction with the cornea
Lies beneath the RPE
Lies between the choriocapillaris and RPE
Identify the incorrect statement
The average range for pH of tears is 5.20 to 8.35
The aqueous layer is the thickest layer of the tear film
The normal flow of tears is under the sympathetic control
The mucin layer converts corneal epithelium into a hydrophobic surface allowing tear film adhesion
The lipid layer of tears is the outermost layer
Identify the incorrect statement
Damage to blood vessels in the verve fiber layer result in spindle-shaped haemorrhages
Blood from bleeding blood vessels in the inner nuclear layer settle in the outer plexiform layer of the retina
The cystic spaces in the macula are longitudinally arranged and give the appearance of a hexagon when there is leakage in the retina due to hypertension
The vortex ampullae drains the choroid vasculature into the vortex vein and the sclera's canal
The branches of the central retinal artery and vein provide nutrition to the inner layers of the retina
Identify the incorrect statement with respect to the conjunctiva of the eye
It is the membranous junction between the lids and the globe of the eye
It is transparent and loosely attached to the underlyingtissue
The junction between the palpebral and bulbar conjunctiva is called the fornix
It folds medially into the plica semilunaris
The palpebral part lines the globe of the eye
Identify the incorrect statement
The branches of the central artery and vein run in the nerve fibre layer
Axons are normally unmyelinated until they pass through the lamina cribrosa
All retinal layers cease at disc, except the nerve fibre layer
The macula has dual vasvular supply
The choriocapillaris provide blood supply to the inner retinal layers
Identify the pathway for tear drainage
Puncta, canaculi, lacrimal sac, nasolacrimal duct, inferior nasal meatus
Lacrimal sac, puncta, nasolacrimal duct, canaculi, inferior nasal meatus
Nasolacrimal duct, lacrimal sac, canaculi, puncta
Puncta, nasolacrimal duct, inferior nasal meatus, lacrimal sac
Canaculi, puncta, nasolacrimal duct, lacrimal sac, inferior nasal meatus
In the statements below, which of the actions of the accompanying extraocular muscles is FALSE?
Medial rectus produces adduction of the eye
Superior rectus produces maximum elevation of the eye when it is abducted by 23 degrees
Inferior rectus produces maximum depression of the eye, which is the greatest when the eye adducts
Lateral rectus produces abduction of the eye
Superior oblique produces intorsion of the eye
The actions of the inferior oblique is/are
Tertiary action is abduction
Primary action is intorsion
Secondary action is extorsion
Primary action is depression
Secondary action is adduction
Which of the following statements is true of the endothelium of the cornea
It is the thickest layer of the cornea
Loses hexagonal cells as one ages
Does not play a role in the maintenance of corneal hydration
Cells are capable of profuse cell division
Severe injury to the endothelium does not impair vision
The iris dilator is controlled by the __________ nervous system and has fibres oriented _________
Sympathetic, radially
Parasympathetic, radially
Neurological, radially
Autonomic, longitudinally
Sympathetic, circular
The meibomian glands
Prevent adhesion of the lids
Prevent evaporation of the tear ducts
Enhance overflow of tears at the lid margin
Secretes the mucin components of the tear film
They are arranged horizontally in the tarsal plate
The muscle affected in a patient with a left exotropia
Left superior oblique muscle
Left inferior rectus
Left inferior oblique
Left medial rectus
Left superior rectus
The parts of the uvea from the most posterior to anterior stucture are
Choroid, iris, ciliary body
Iris, ciliary body, choroid
Choroid, ciliary body, iris
Sclera, iris, ciliary body
Ciliary body, iris, sclera
The vitreous
Is the vascular gel between the lens and retina
With age become more viscous and results in decreased adhesion between the vitreous and the internal limiting membrane of the retina
Is an avascular gel between iris and retina
Accounts for 1/3rd of the eye volume
Can be detached from the retina at the optic nerve head producing a Weiss ring
Transparent fluid between iris and cornea
Aqueous humor
Serum
Tears
Vitreous humor
Vitreous and aqueous humor
Which is the cranial nerve that innervates the superior oblique muscle
Trochlear nerve
Facial nerve
Vestibulotrochlear nerve
Abducens nerve
Oculomotor nerve
Which muscle is a continuous annulus of muscle surrounding and opposite the equator of the lens
Muscle of Brucke
Muller's muscle
Muscle of Bowman and Muller's muscle
All of the options are correct
Muscle of Bowman
Which of the following does not go through an aperture in the sclera
Schlemm's canal
Vortex vein
Posterior ciliary arteries
Optic nerve
Anterior ciliary arteries
Which of the following EOMs is not innervated by the 3rd cranial nerve?
Inferior oblique
Medial rectus
Superior rectus
Inferior rectus
Superior oblique
Which of the following forces is not involved in the removal of tears
Blinking
Capillary attraction
Osmosis
Gravity
Lateral lid movement
Which of the following is incorrect regarding the cornea
Descemet's membrane is posterior to the stroma
Neovascularisation of the cornea may occur due to lack of o2
The epithelium is anterior to Bowman's layer
The thickest layer of the cornea is the endothelium
Damage to Bowman's layer can result in scarring of the cornea
Which of the following is incorrect regarding the uvea of the eye
The longitudinal ciliary fibres are furthest away from crystalline lens
When the circular ciliary muscle fibers contract, the ciliary body draws closer to crystalline lens
The ciliary processes of the ciliary body are responsible for the production of aqueous humor
The circular muscle fibres of the ciliary muscle acts as a sphincter
A decrease in tension of the zonules results in a decrease in lens power.
Which of the following is false with respect to the fascia in the eye
The periorbita serves as an attachment site for muscles, tendons and ligaments
The fascia allows for a continuity of the ocular structures within the orbit
The orbital septum serves as a barrier function by preventing disease to spread beyond the eyelid to the orbit
Tenon's capsule represents the innermost fascia
The orbital septum connects the bony frame of the orbit with the eyelid
The iris is thickest at the
Epithelium zone
Collarette
Pupillary zone
Ciliary zome
Pigment frill
Which statement is false about the sclera?
Forms the lamina cribrosa in the optic nerve region
Forms the tough outer coat of the eye
Contains mainly type I and III collagen
Comprises of a thin elastic episclera beneath the surface
Which statement is false regarding Tenon's capsule
Regarded as a continuation of dura mater
Supports the globe
Very easily separated from the sclera
Covers the globe from limbus to the optic nerve
Provides tissue resistance to stress
Which of the following statements is false regarding eyelid movements
Eyelids are closed by action of the orbicularis oculi muscle, which is innervated by cranial nerve III
Frontalis muscle helps the levator palpebrae muscle in extreme upward gaze
Orbital portion of the orbicularis muscle is responsible for forcible closure of the eyelids
Levator palpebrae superioris muscle is responsible for elevation of the eyelid
In reflex blinking, the globe and eyelid move in opposite directions
Which of the following statements is true about layers of the crystalline lens
Lens epithelium serves as a basal membrane for the lens capsule
It is thickest at the lens capsule
The nucleus is surrounded by the cortex, which is surrounded by the capsule
Has the same refractive indices
Lens capsule thickness decreases with age
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