Oph_1st
Corneal Health Quiz
Test your knowledge about corneal health and microbial keratitis with this comprehensive quiz designed for students and professionals in the field of ophthalmology.
Challenge yourself with questions covering a variety of topics, including:
- Corneal Anatomy
- Conditions affecting the cornea
- Infections and treatments
- Diagnosis and prevention
90 percent of the cornea is made up of
Stroma
Epithelium
Bowman’s layer
A. Descemet’s membrane
Which one is not the Cornea characterize
Avascular
Transparence
High density of nerves supply
Nutrition by nutrient from Vitreous
The clarity of the Cornea due to from
Endothelium of cornea
Corneal Stroma
Tear film
Epithelium of cornea
Fungal keratitis is the most difficult to treat cause by :
Organism are resistance with Anti – Fungal drugs
General health of the patient is weaker
All of Anti-Fungal are Fungal –static drugs
Large corneal epithelial damage
The principal treatment of microbial keratitis except :
Promote re-epithelialization of cornea
Use all types of drugs the same time
Control infection agents
Control inflammation
Which one is the most common of microbial keratitis in Cambodia ?
Fungal keratitis
Bacterial Keratitis
Viral keratitis
Parasite keratitis
Very painful of Acantamoeba Keratitis due to from :
Ciliary muscle spasm and inflammation
Large of epithelial defected
Density of organisms in the area of stroma infected
Radial Kerato- neuritis of the corneal nerves
/ Which organism is the most powerful of corneal perforation in microbial keratitis ?
Fungal keratitis
Bacterial Keratitis
Viral keratitis
Parasite keratitis
Which organism is the most leaded to neurotrophic dry eye after microbial keratitis ?
Fungal keratitis
Viral keratitis
Bacterial Keratitis
Parasite keratitis
Most common viral infection of the cornea is:
Molluscum contagiosum
Herpes simplex
Adenovirus
Herpes zoster
The most significant cause of red eye which requires immediate attention is:
Exposure keratitis
Acute angle closure glaucoma
uveitis with conjunctiva and scleral and hyperemia
Severe bacterial conjunctivitis
Eye pain is caused by:
Shallow anterior chamber
Presence of severe discharge
Cilliary muscle spasm
an intraocular pressure of 24 mmHg
Corneal opacity from Trachoma (CO) can happen on the people age :
People from 15 to 30 year old
Children under 9 year old
Children from 9 to 15 year old
People over 30 year old
What is proper Treatment of trichiasis :
Epilation of the eyelashes
Use eye Lubricate medication
Use bandage contact lens (BCL)
Electrolysis of the eyelashes follicle
Trichiasis from Trachoma (TT) can happen on the people age :
People from 15 to 30 year old
children under 9 year old
Children from 9 to 15 year old
people over 15 year old
The Trachoma can be control by :
SAFE strategy
Use anti biotic
Face washing
Environment improving
What is congenital distichiasis ?
The eye lashes grow behind the meibomian orifice row
The eye lashes grow on the grey line
This is inherited in an AD manner that the eye lashes grow behind the meibomian orifice row
There is the modified of the skin and conjunctiva at grey line that metaplasia and dedifferentiation of the meibomian glands to become hair follicles
Which on is proper for treatment of distichiasis :
Eyelashes follicle destroy or excision
Epilation of the eyelashes
Eye lid correction procedure
Use bandage contact lens ( BCL)
Herpetic corneal ulcer is fastest diagnosed by:
Geimsa stain
EL1SA
Cell culture/PCR
Rose Bengal stain
The most complication of ectropion is
Conjunctival keratinization
Corneal scarring
Conjunctival chemosis
Exposure keratitis
A conjunctival inflammatory response characterized by multiple polygonal nodules with central fibrovascular cores is consistent with a:
Phyctenular response.
Papillary response
Giant papillary response
Follicular response.
Which of the following is not an advantage of photorefractive keratectomy (PRK) when compared to laser-assisted in situ keratomileusis (LASIK) ?
Reduced postoperative pain
Reduced incidence of corneal perforation
Reduces incidence of endophthalmitis
Faster recovery vision post operation .
The only bacterial conjunctivitis that routinely leads to preauricular lymphadenopathy is:
Streptococcus pneumoniae
Neisseria meningitidis
Haemopilus influnzae.
Haemiphilus aegyptius
The most common cause of hyper acute purulent conjunctivitis is:
Streptococcus pneumoniae
Haemophilus aegyptius
Neisseria meningitides
Neisseria gonorrhoeae
25 / Typically, the first of antibody produced against a newly encountered antigen is:
IgA
IgE
IgM
IgG
The cornea has:
5 layers
4 layers
Epitheliual covering which is not capable of regenation
Higher water content than adjacent sclera .
The corneal has a refractive power :
Decreasing as the corneal flattens
A greater than the lens
Capable of producing astigmatism in certain condition.
All of above .
The Normal cornea has not :
The ability to regenerate Bowman”s membrane
A abundant blood vessels seen only with high magnification
Rich sensory innervation
One layer endothelium
Band shaped keratopathy is commonly caused by deposition of:
Magnesium salt
Calcium salt
Ferrous salt
Copper salt
Irrespective of the etiology of a corneal ulcer, the drug always indicated is:
Corticosteroids
Cycloplegics
Antibiotics
Antifungals
Dense scar of cornea with incarceration of iris is known as:
Adherent Leucoma
Dense leucom
Ciliary staphyloma
Iris bombe
Corneal sensations are diminished in:
Herpes simplex
Conjunctivitis
Fungal infections
Marginal keratitis
The color of fluorescein staining in corneal ulcer is:
Yellow
Blue
Green
Royal blue
Phlycten is due to:
Endogenous allergy
Exogenous allergy
Degeneration
Conjunctival dystrophy
A recurrent bilateral conjunctivitis occurring with the onset of hot weather in young boys with symptoms of burning, itching, and lacrimation with large flat topped cobble stone papillae raised areas in the palpebral conjunctiva is:
Mucopurulent conjunctivitis
Trachoma
Vernal keratoconjunctivitis
Phlyctenular conjunctivitis
Which of the following organism can penetrate intact corneal epithelium?
Staph aureus
Strept pyogenes
Pseudomonas pyocyanaea
Corynebacterium diphtheriae
A 12 years old boy receiving long term treatment for spring catarrh, developed defective vision in both eyes. The likely cause is:
Retinopathy of prematurity
Posterior subcapsular cataract
Optic neuritis
Vitreous hemorrhage
A 16 years old girl receiving long term treatment for spring catarrh, developed defective vision in both eyes. The likely cause is:
Retinopathy of prematurity
Optic neuritis
Suddenly change of corneal refractive power
Glaucoma with increased IOP
A young child suffering from fever and sore throat began to complain of lacrimation. On examination, follicles were found in the lower palpebral conjunctiva with tender preauricular lymph nodes. The most probable diagnosis is:
Staphylococal conjunctivitis
Trachoma
Phlyctenular conjunctivitis
Adenoviral conjunctivitis
Patching of the eye is contraindicated in:
Bacterial corneal ulcer
Corneal abrasion
Mucopurulent conjunctivitis
After glaucoma surgery
Ten years old boy complains of itching. On examination, there are mucoid nodules with smooth rounded surface on the limbus, and mucous white ropy mucopurulent conjunctival discharge. He most probably suffers from:
Bulbar spring catarrh ( Allergy of conjunctiva) d.
Purulent conjunctivitis
Trachoma
Mucopurulent conjunctivitis
In viral epidemic kerato-conjunctlvitis characteristically there is usually:
Excessive watery lacrimation
Copious purulent discharge
Copious muco-purulent discharge
Mucoid ropy white discharge
Corneal Herbert's rosettes( Limbal follicle shrinking ) are found in:
Phlyctenular keratoconjunctivitis
Mucopurulent conjunctivitis
Trachoma
Spring catarrh
A patient complains of maceration of skin of the lids and conjunctiva redness at the inner and outer canthi. Conjunctival swab is expected to show:
Slaphylococcus aureus.
Streptococcus viridans.
Morax- Axenfeld diplobacilli
Tranta's spots are noticed in cases of:
Active trachoma
Bulbar spring catarrh
Corneal phlycten
Vitamin A deficiency
Some pain, tender, non itchy localized redness of the conjunctiva can be due to:
Episcleritis
. Bulbar spring catarrh
Vascular pterygium
Phlyctenular conjunctivitis
In trachoma the patient is infectious when there is:
Post-trachomatous concretions
Arlt's line
Follicles and papillae in the palpebral conjunctiva
Herbert's pits
A female patient 18 years old, who is contact lens wearer since two years, is complaining of redness, lacrimation and foreign body sensation of both eyes. On examination, visual acuity was 6/6 with negative fluorescein test. The expected diagnosis can be:
Giant papillary conjunctivitis
A. Acute anterior uveitis..
Acute congestive glaucoma
Bacterial corneal ulcer
Fifth nerve palsy could cause:
Ptosis
Proptosis
Neuropathic keratopathy
Lagophthalmos
Topical steroids are contraindicated in a case of viral corneal ulcer for fear of:
Cortical cataract
Secondary glaucoma
Corneal perforation
Secondary viral infection.
The sure diagnostic sign of corneal ulcer is
Ciliary injection
Blepharospasm
Miosis
Positive fluorescein test.
The effective treatment of dendritic ulcer of the cornea is:
Local corticosteroids
Systemic corticosteroids
Surface anesthesia
Acyclovir ointment
Herpes simplex keratitis is characterized by:
No tendency to recurrence
Presence of pus in the anterior chamber
Corneal hyposthesia
Tendency to perforate
Bacteria, which can attack normal corneal epithelium:
Neisseria gonorrhea
. Staphylococcal epidermidis
Moraxella lacunata
Staphylococcal aureus
Advanced keratoconus is least to be corrected when treated by
Rigid gas permeable (RGP) contact lens
Hard contact Lens
Spectacles
Keratoplasty.
The most Organisms causing angular conjunctivitis are:
Moraxella Axenfeld bacilli
Pneumococci
Gonococci
Adenovirus
Chalazion is a chronic inflammatory granuloma of
Meibomian gland
Zies’s gland
Sweat gland
Wolfring’s gland
Deep leucoma is best treated by:
Tattooing
Lamellar keratoplasty
Keratectomy
Penetrating keratoplasty
Blood vessels in a trachomatous pannus lie:
Between Bowman's membrane & Epithelium.
Beneath the Descemet's membrane
In the substantia propria.
Between Bowman's membrane & substantia propria.
In vernal catarrh, the characteristic cells are:
Macrophage
Eosinophils
Neutrophils
Epitheloid cells
The commonest cause of hypopyon corneal ulcer is:
Moraxella
Gonococcus
Pneumococcus
Staphylococcus
Irrespective of the etiology of a corneal ulcer, the drug always indicated is:
Corticosteroid
Atropine
Antibiotics
Antifungal
Fleischer ring is found in:
Keratoconus
Chalcosis
Argyrosis
Buphthalmos
Intercalary staphyloma is a type of
Scleral staphyloma ( root of the iris area)
Equatorial staphyloma
Posterior staphyloma
Anterior staphyloma
Cornea is supplied by nerve fibers derived from:
Optic nerve
Trochlear nerve
Trigeminal nerve
Oculomotor nerve
Ciliary injection is not seen in:
Bacterial ulcer
Chronic iridocyclitis
Catarrhal conjunctivitis
Acute iridocyclitis
Most of the thickness of cornea is formed by:
Descemet's membrane
Epithelial layer
Substantia propria (stroma )
Endothelium
A 30 years old male presents with a history of injury to the eye with a leaf 5 days ago and pain, photophobia and redness of the eye for 2 days. What would be the most likely pathology?
Anterior uveitis
Fungal corneal ulcer
Corneal laceration
Conjunctivitis
Commonest cause of posterior staphyloma is:
Glaucoma
Retinal detachment
Iridocyclitis
High myopia
Schirmer’s test is used for diagnosing:
Dry eye
Infective keratitis
Watering eyes
Horner’s syndrome
Schirmer’s test is used for diagnosing:
Quantity of Dry eye
Quality of dry eye
Watering eyes
Quantity of tear lipid
Tear breakup time is the test for evaluate :
Quantity of Dry eye
Quality of dry eye
Watering eyes
Quantity of tear lipid .
In Dry Eye ,which is the best test for evaluated of ocular surface damages ?
Rose Bengal staining
Fluoresceine staining
TBUT
Test d Schirmer’s test
7 months old infant with watering lacrimal sac on pressing causes regurgitation of mucopus material. What is the appropriate treatment?
Probing with syringing
Probing
Massage with antibiotics up to age of 18 months
Dacryocystorhinostomy
Stevens –Johnson Syndrome is caused by :
Hereditary diseases
Drugs administrations only
Drugs and micro organisms infections
Infection diseases only
The Dry eye in Stevens -Johnson syndrome is caused from :
Damage of Mucin layer of tear film
Damage of Lipid layer of tear film
Damage of aqueous layer of tear film
Damage of all layer of tear film
The main Deficiencies of aqueous layer of tear film of Dry eye in Stevens -Johnson syndrome is cause by :
Inflammatory of the lacrimal gland
Krause and Wolfring glands Damages
Scaring of lacrimal duct orifice
Infiltrate if Lymphocyte cells into Lacrimal gland
The risk factors of Sjogren’s syndrome is :
The men ages older 40 years old. With Lupus or Rheumatoid diseas
The women ages older 40 years old
The men ages older 40 years old
The women ages older 40 years old with Lupus or Rheumatoid diseases
The dry eye in Sjogren’s syndrome is
Deficiencies of Mucin layer of tear film
Deficiencies of Lipid layer of tear film
Deficiencies of aqueous layer of tear film
Deficiencies of all layer of tear film
The main Deficiencies of aqueous layer of tear film of Dry eye in Sjogren’s syndrome is cause by :
Inflammatory of the lacrimal gland
Scaring of lacrimal duct orifice
Krause and Wolfring glands Damages
Infiltrate if Lymphocyte cells into Lacrimal gland
Specular microscopy reveals a patient’s cornea to have 60% non-hexagonal endothelial cells. Which one of the following is the MOST likely diagnosis?
Maumenee’s corneal dystrophy
Congenital hereditary endothelial dystrophy
Posterior polymorphous corneal dystrophy
Fuch’s endothelial dystrophy
What is the MOST common autoimmune condition associated with peripheral ulcerative keratitis?
Rheumatoid Arthritis
Relapsing polychondritis
Systemic lupus erythematosis (SLE)
Granulomatosis with Polyangiitis (Wegener Granulomatosis)
A patient has splashed a detergent (cleaning solution ) into their eye. After irrigation there is conjunctival injection and punctate keratopathy. There is no obvious limbal ischaemia and no epithelial defect. What would be the MOST appropriate next line of management?
Topical potassium citrate and antibiotic
Topical antibiotic and analgesia
Topical potassium ascorbate, antibiotic and steroid
Topical antibiotic, steroid and analgesia in short period
With regard to ocular cicatricial pemphigoid (OCP) which one of the following is MOST likely to be correct? A. B. C. D.
When a conjunctival biopsy is taken, only an incisional biopsy within the scarred conjunctiva should be taken
Presence of lymphocytes and goblet cells at the basement layer is the pathognomonic feature of OCP
A negative biopsy does not exclude the diagnosis of OCP
OCP is usually self-limiting and will enter a “burnt -out” period without treatment in most cases
Ophthalmia neonatorum is prevented by:
Penicillin drops
1% Silver nitrate
Normal saline drops
Frequent eye washes
Cornea is thinned in:
Fuch's dystrophy
Keratoconus
Bulbous lesion
All of the above
Symptoms of corneal ulcer are following except:
Mucopurulent discharge
Pain in the eye
Watering
Redness of the eye
Hordeolum externum is a suppurative inflammation of:
Zeis' gland
Moll's gland
Gland of Krause
Meibomian gland
Intense itching is the most common symptom of:
Trachoma
Blephritis
Phlyctenular conjunctivitis
Spring catarrh
Which of the following is not a source of nutrients to cornea?
Air
Aqueous humour
Perilimbal capillaries
Vitreous humour
Treatment of phlyctenular conjunctivitis is:
Systemic AB drugs
Systemic steroids
Topical acyclovir
Topical steroids
Not causing ophthalmia neonatorum:
Staphylococcus aureus
Adenovirus
HSV
Gonococcus
Cobblestone appearance of conjunctiva is seen with:
Trachoma
Spring catarrh
Purulent conjunctivitis
Angular conjunctivitis
In which of the following conditions in small ulcers the bleed are seen, on removing the yellow crusts on the lid margin:
Bacteria Ulcerative blepharitis
Hordeolum internum
Squamous blepharitis
Parasitic blepharitis
Epidemic conjunctivitis is caused by:
Adenovirus
Herpes virus
EB virus
Papilloma virus
The commonest organism responsible for corneal ulcer is:
Staphylococci
Pneumococci
Pseudomonas
Candida
In case of central dense leucoma 5 mm, treatment of choice is:
Penetrating keratoplasty
Lamellar keratoplasty
Tattooing
Enucleation
Dense scar of cornea with incarceration of iris known as:
Leucoma adherent
Leucoma non adherent
Ciliary staphyloma
Iris Bombe
Adhesion of iris margin anteriorly to cornea is known as:
Anterior synychia
Peripheral synychia
Posterior synychia
Iris Bombe
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