[06.07] CMD - Red Eye V2.2.pdf

Red eye

What is the cardinal sign of ocular inflammation caused by the dilation of blood vessels in the eye?

Conjunctival injection

Which type of ocular redness mainly affects the posterior conjunctival blood vessels, produces more intense redness, moves with the conjunctiva, and constricts with topical vasoconstrictors?

Ciliary injection

Which type of ocular redness involves branches of the anterior ciliary arteries, presents as a deeper redness, and indicates inflammation of deeper structures such as the cornea, iris, or ciliary body?

Cornea, iris, and ciliary body

Inflammation of which three deeper ocular structures characteristically produces ciliary injection?

Temporality / Onset

What history parameter evaluates whether a red eye episode is acute, chronic, or recurrent?

Associated symptoms

What clinical history category includes questions regarding visual changes, photophobia, eye pain, and whether eye discharge is clear or colored?

Ophthalmologic history

What history component inquires about previous eye surgeries and current or prior eye medications?

Systemic medical history

In evaluating red eye, asking about allergies, asthma, hypertension, collagen disease, and systemic medication intake belongs to which history component?

Visual acuity

What is the essential initial objective functional assessment performed during the eye examination for red eye?

Eyelid inspection with eversion

Which gross examination step allows visualization of the palpebral and tarsal conjunctiva for papillae, follicles, or foreign bodies?

Direct and consensual pupil reactivity

What two pupil light reflex responses must be evaluated during a red eye gross examination?

Slit lamp examination

Which ophthalmic examination technique allows high-magnification evaluation of corneal edema, corneal defects, anterior chamber depth, cells, and flare?

Fluorescein staining

Which diagnostic dye application combined with cobalt blue light is used during slit lamp examination to detect corneal epithelial defects and lesions?

Cells and flare

What two anterior chamber inflammatory findings are specifically evaluated during slit lamp examination of the anterior chamber?

Tonometry

Which objective diagnostic examination measures intraocular pressure (IOP)?

Conjunctivitis, keratitis, glaucoma, uveitis, and dry eye disease

What are the five common major causes of red eye?

Conjunctiva

What transparent, richly vascular mucous membrane lines the anterior globe and inner eyelids?

Pre-auricular and submandibular lymph nodes

Into which two regional lymph node groups does the dense lymphatic network of the conjunctiva drain?

Bulbar, palpebral, and forniceal conjunctiva

What are the three anatomical divisions of the conjunctiva?

Cornea

What clear, transparent, avascular structure forms the anterior refracting surface of the eye?

Epithelium, Bowman layer, stroma, Descemet membrane, and endothelium

What are the five layers of the cornea from anterior to posterior?

Follicular and papillary conjunctivitis

What are the two distinct morphological types of conjunctival inflammatory reactions?

Follicular conjunctivitis

Which conjunctival inflammatory reaction involves conjunctival-associated lymphoid tissue (CALT) forming smooth, rounded lymphoid germinal centers beneath the epithelium?

Avascular at apices and surrounded by fine vessels at bases

How are blood vessels distributed relative to the nodules in follicular conjunctivitis?

Regional lymphadenopathy

What systemic physical exam finding frequently coexists with follicular conjunctivitis?

Adenovirus, enterovirus, primary herpes simplex virus, and chlamydia

What four infectious agents commonly cause follicular conjunctivitis?

Pilocarpine and timolol

Which two ophthalmic drugs are known to cause drug toxicity leading to follicular conjunctivitis?

Papillary conjunctivitis

Which non-specific conjunctival inflammatory reaction usually affects the upper tarsal conjunctiva and features a central fibrovascular core?

Spoke-like pattern

How do blood vessels branch outward from the central fibrovascular core within a papilla?

Anchoring connective tissue septa

What structural septa surround conjunctival papillae and anchor them to the underlying conjunctival stroma?

Mosaic pattern

What characteristic geometric pattern is formed by the telangiectatic blood vessels in papillary conjunctivitis?

Mechanical irritation, allergic reactions, and bacterial infections

What three general categories of etiologies can induce papillary conjunctivitis?

Follicles

Which conjunctival lesions are lymphoid germinal centers that are avascular at their apices?

Papillae

Which conjunctival lesions contain a central fibrovascular core with vessels branching outward in a spoke-like pattern?

Adenoviral conjunctivitis

Which viral conjunctivitis is one of the most common causes of red eye consults in the emergency room?

Unilateral conjunctival hyperemia

With what sudden ocular presentation does adenoviral conjunctivitis typically begin before involving the fellow eye in 1 to 2 days?

Palpable preauricular or submandibular lymphadenopathy

What lymph node finding characteristically accompanies adenoviral conjunctivitis?

Serous (watery) discharge

What type of eye discharge is typically produced in adenoviral conjunctivitis?

Cold compresses and lubricant drops

What supportive treatments are used to manage adenoviral conjunctivitis?

Proper hand hygiene and avoiding sharing of utensils, towels, and linens

What hygiene measures are advised to prevent the transmission of adenoviral conjunctivitis?

Epidemic Keratoconjunctivitis (EKC)

What clinical syndrome represents adenoviral conjunctivitis with the added feature of corneal inflammation?

Serotypes 8, 11, and 19

Which three adenoviral serotypes are most commonly associated with Epidemic Keratoconjunctivitis?

Subepithelial infiltrates (SEIs)

Which corneal lesions develop 1 to 2 weeks after the onset of EKC symptoms and represent a host immune response?

Host immune response

What is the underlying cause of subepithelial infiltrates in EKC rather than active viral replication?

Steroids

Which medication class used in EKC reduces inflammatory symptoms and corneal scarring but risks enhancing viral replication and prolonging viral shedding?

Membranous conjunctivitis

Which conjunctival condition occurs when an inflammatory discharge of fibrin and polymorphonuclear leukocytes (PMNs) coagulates on the conjunctival surface?

True membrane

Which type of conjunctival membrane incorporates the epithelium and bleeds upon removal?

Pseudomembrane

Which superficial conjunctival fibrin sheet can be peeled away easily without causing bleeding?

Adenovirus, herpes simplex, Corynebacterium, Gonococcus, and beta-streptococcus

What five infectious pathogens are associated with membranous conjunctivitis?

Chemical burns and Stevens-Johnson syndrome (SJS)

What two non-infectious conditions can cause membranous conjunctivitis?

Neisseria gonorrhoeae

Which bacterium causes hyperacute, rapid, and copious purulent conjunctivitis with chemosis and lid edema?

Ability to penetrate intact corneal epithelium

What unique virulence feature allows Neisseria gonorrhoeae to cause rapid, vision-threatening keratitis?

Gram-negative intracellular diplococci

What microscopic morphology is revealed on Gram stain of swab specimens in gonococcal keratoconjunctivitis?

Infected genital secretions and genital-hand-ocular transmission

By what two routes is gonococcal keratoconjunctivitis transmitted?

Systemic IM ceftriaxone

What systemic antibiotic therapy is required for treating gonococcal keratoconjunctivitis alongside topical antibiotics and eye irrigation?

Chlamydia trachomatis

What concomitant sexually transmitted ocular infection must always be treated when managing gonococcal keratoconjunctivitis?

Chlamydia trachomatis

Which organism is the most common cause of neonatal conjunctivitis?

Chlamydial (inclusion) conjunctivitis

Which chronic sexually transmitted ocular infection presents with a prominent follicular response and non-tender preauricular lymphadenopathy?

Infertility

Eye infection from Chlamydia trachomatis in women can be the only detectable manifestation of genital tract infection causing what reproductive complication?

Oral doxycycline and topical erythromycin

What combination oral and topical antibiotic therapy is required for chlamydial inclusion conjunctivitis?

Presence or absence of proliferative changes

On what structural criteria are allergic conjunctival diseases classified?

Seasonal allergic conjunctivitis (SAC) and perennial allergic conjunctivitis (PAC)

What are the two subdivisions of allergic conjunctivitis that lack proliferative changes?

Atopic keratoconjunctivitis (AKC)

Which allergic conjunctival disease is complicated by coexisting atopic dermatitis?

Vernal keratoconjunctivitis (VKC)

Which allergic conjunctival disease features prominent proliferative changes in young individuals?

Giant papillary conjunctivitis (GPC)

Which allergic conjunctival condition is induced by mechanical foreign body irritation such as contact lenses?

Type 1 hypersensitivity reaction (IgE-mediated)

What immunologic mechanism drives simple allergic conjunctivitis?

Itching

What symptom is the primary diagnostic clue and hallmark of allergic conjunctivity?

Mucoid, stringy, or ropy discharge

What is the classic physical description of eye discharge in allergic conjunctivitis?

Allergen avoidance

What is the key non-pharmacologic intervention in managing allergic conjunctivitis?

Topical antihistamines and mast cell stabilizers

What two topical drug classes are first-line for symptomatic allergic conjunctivitis?

Combined Type I and Type IV hypersensitivity reaction

What dual immunologic mechanism drives both atopic keratoconjunctivitis (AKC) and vernal keratoconjunctivitis (VKC)?

Atopic dermatitis

What chronic cutaneous disease is characteristically associated with atopic keratoconjunctivitis?

Older patients

Which age demographic is predominantly affected by atopic keratoconjunctivitis?

Milky bulbar conjunctival edema

What bulbar conjunctival finding is seen on examination in atopic keratoconjunctivitis?

Symblepharon

What term describes the abnormal adhesion between the palpebral and bulbar conjunctiva that can occur in severe AKC?

Young males in tropical or hot, arid climates

Which demographic and geographic population is most commonly affected by vernal keratoconjunctivitis?

Spring

The term "vernal" in VKC derives from which season, reflecting a seasonal increase in signs and symptoms?

Blepharospasm

What term describes the involuntary dystonic contraction of the eyelids resulting in increased blinking and eye closure in VKC?

Palpebral, limbal, and mixed VKC

What are the three clinical forms of vernal keratoconjunctivitis?

Cobblestone papillae

What descriptive term refers to the diffuse papillary hypertrophy on the upper palpebral conjunctiva in palpebral VKC?

Macro-erosions

What corneal lesions form in VKC when inciting agents released from the upper tarsal conjunctiva cause corneal epithelial necrosis?

Sterile shield ulcers

What severe corneal ulcers form in neglected VKC when mucus and calcium deposition prevent epithelial re-epithelialization?

Limbal papillae

Which structures form on the superior limbus in limbal VKC, giving the limbus a thickened gelatinous appearance?

Horner-Trantas dots

What name is given to the whitish aggregates of dead eosinophils located on top of limbal papillae in VKC?

Topical cyclosporine

Which immunomodulatory agent is added to topical antihistamines, mast cell stabilizers, and corticosteroids for treating VKC?

Superior tarsal conjunctiva

On which specific palpebral surface do giant papillae (>1 mm) develop in giant papillary conjunctivitis?

Soft contact lens wear

What is the most common predisposing cause of giant papillary conjunctivitis?

Ocular prostheses, exposed sutures, and filtering blebs

What three non-contact lens chronic irritative stimuli can cause giant papillary conjunctivitis?

Removal or discontinuation of the foreign body / contact lenses

What is the essential primary step in managing giant papillary conjunctivitis?

Pterygium

What benign fibrovascular proliferation covered by conjunctival-like epithelium extends onto the peripheral cornea?

Elastotic collagen degeneration

What characteristic histological finding is present in the subepithelial fibrovascular tissue of a pterygium?

Pinguecula

What elastotic conjunctival lesion precedes a pterygium but does not extend onto the cornea?

Chronic exposure to UV light (sunlight)

What is the most important environmental risk factor for pterygium development?

Farmers, fishermen, pearl divers, and surfers

What four occupational or outdoor activity groups are at high risk for pterygium?

Bowman layer

Within or above which corneal layer is a pterygium located?

Stocker line

What name is given to the corneal epithelial iron line seen at the advancing head of a pterygium?

Excision combined with a conjunctival autograft

Which surgical approach is preferred for pterygium removal to act as a mechanical barrier and prevent recurrence?

Mitomycin-C

Which adjunctive pharmacological agent can be combined with pterygium excision to reduce recurrence?

Phlyctenulosis

What condition presents with focal, translucent lymphocytic nodules generally located at the limbus or cornea?

Delayed T-cell-mediated hypersensitivity (Type IV)

What type of hypersensitivity reaction causes phlyctenulosis?