lu6 review lec
TRANSCRIPT
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REVIEW LECTURESfor LU 6
Basic Eye Exam
Common OPD Complaints
Common ER Cases
Pharmacology
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INTRODUCTION
This is a REVIEW:
Repeat of some of your lectures last year. Aim: give you guidelines regarding what to
study; from now on you need to do a lot of
self study
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The pace of the lecture will therefore be a
little faster than first-timers: about 40
sec/slide This entire lecture is in your handout
Just a guideline of topics to study
YOU MUST STUDY ON YOUR OWN
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Ophtha is ³another world´
New terms, new skills, a lot of procedures The general rules of the Medical Profession hold
true
± TREAT THE PATIENT
± TAKE A CONCISE YET GOOOOOD HISTORY
± IF YOU ARE IN DOUBT: ASK! This is the importance
of the hierarchy in the Medical World
± THINK OF NOTHING- BUT TO GIVE PERFECT
SERVICE AND EVERYTHING, EVERYTHING ELSEWILL FOLLOW
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BASIC EYE EXAM
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Visual Acuity Testing
Check vision first before touching
patients¶ eyes or shining light ontopatients¶ eyes
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Distance Visual Acuity
VA = 6/30 + 1
6/21 -2
If the patient is not
able to read all the
letters in a given line
± Record this as a (+) or
a (-) the number of
letters read or not read
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Distance Visual Acuity
VA = 6/15 +3
6/12 - 2
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Visual Acuity Testing
If patient is unable to read the 6/60 line at
6 meters.
± Move the patient closer to a distance JUSTENOUGH for the patient to be able to read
JUST THE FIRST LINE
VA measurement = numerator is replaced by the
new distance where the patient was able to read
the first line e.g. 3/60
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Visual Acuity Testing
Finger Counting is never done at a
distance of 6 meters or more
If VA improves with PH, likely that poor vision is due to an EOR
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Vision in Infants
When testing VA in infants
± Make sure that the only stimulus being used
is visual (no auditory stimuli e.g. bells)
± Observe if infant becomes irritable when one
eye is covered compared to the other
± Record VA as
(+) dazzle/ Centered, steady, maintained, able to fixate,
follows object
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Near Vision
Near vision : NV
± If patient is able to read only figures larger
than those corresponding to the J16 line,
Near Vision is recorded as >J16
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Gross Examination
Check eyelids and eyelash, check positionof lids
Check for proptosis, exophthalmos
Check corneal clarity and corneal lightreflex
Check sclera
Check pupil size and pupillary lightreaction
Check extraocular muscle movement
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INTRAOCULAR PRESURE
Normal IOP 8-21 mmHg (Goldmannapplanation tonometer)
IOP difference greater than 2 mmHg inboth eyes: glaucoma screening isrecommended
Palpation tonometry: hypotonic, soft, firm
or hard Do not palpate if you suspect an open eye
injury !
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FUNDUSCOPY
Check media
Check disc (difference of O.2 in CD ratio
between eyes is suspicious) Check retinal vessels
Check for presence of hemorrhages,
exudates or other lesions Check macular area and foveal reflex
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Common OPDComplaints and Conditions
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COMMON EYE COMPLAINTS
Decreased visual acuity
Photophobia
Colored Haloes
Red eye Painful eye
Protrusion
Squint
Inability to move eye
Exudation
Itching
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Decreased Visual Acuity:
Error of Refraction
Distance vision ± All children by age 3 should have v.a. checked
± Errors of Refraction
Myopia Hyperopia
Near or Reading vision ± Errors of Refraction
Myopia
Hyperopia
Presbyopia
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Decreased Visual Acuity: Cataracts
Note: check ROR, Dilated Pupil Exam
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Decreased Visual Acuity: Corneal Leukoma
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Decreased Visual Acuity: Glaucoma
Potentially blinding: check C/D ratio
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Decreased VA: Retinal Diseases:
RRD with Proliferative
Vitreoretinopathy
Macular scar
Subretinal hge: AMD, trauma DM Retinopathy
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Retinal Manifestation of Systemic Dse
Hypertensive Ret: AVcrossing changes
Branch Retinal Vein Occlusion Central Retinal Vein Occlusion
Macular edema / star
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Decreased VA: r/o Systemic Disr/o Carotid/Cardiac Valve Plaques, Abnormal Lipid Profile, HPN, Drugs,
Contraception, Behcet¶s Dis
Cotton Wool Spot: (Large) / Branch
Retinal Arteriole Occlusion
Central Retinal Arteriole
Occlusion : CRAO
Branch Retinal Arteriole
Occlusion: BRAO
CRAO: Aratiles/Cherry Red
Spot
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Decreased VA: Blinding Eye Diseases:
Potentially Life Threatening
Retinoblastoma
Note: mid dilated pupil: OS
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Red Eye Differentials
Acute Angle Glaucoma
Hazy cornea: edema,
mid-dilated, shallow
anterior chamber
± Haloes
± Photophobia
± pain
Ciliary flush: dilated deep
conjunctival andepiscleral vessels around
limbus
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Red Eye Differentials
Herpes Simplex Keratitis
Dendritic corneal ulcer
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Red Eye Differentials: Conjunctivitis
Discharge: bacterial
± Purulent: creamy white
± Mucopurulent:
yellowish
Discharge: allergic ± Serous: white stringy
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Bacterial Conjunctivitis
Discharge
± Purulent: creamy white
± Mucopurulent:
yellowish
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Bacterial Conjunctivitis
Exudation: ³mattering´
± Conjunctival or eyelid
inflammation
± Not in acute glaucoma
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Allergic Conjunctivitis
Hyperemia/dilation of
the conjunctival blood
vessels
Can have whitestringy discharge
Stringy discharge
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Red Eye Differentials
Scleritis
Potentially serious
Inflammation: focal or
diffuse
Usually painful
Usually chronic
r/o collagen vascular
disease r/o rheumatoid
diseases
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Red Eye Differentials
Subconjunctival Hemorrhage
blood between conjunctiva and sclera with
areas of intact white sclera
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Red Eye Differentials
Blunt trauma
Hyphema vs Hypopyon
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Red Eye Differentials
Pterygium
Triangular fold of vascular conjunctiva
creeping into cornea
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Red Eye Differentials
Corneal Foreign Body
Surrounded by a rust ring and edema
Pain, foreign body sensation, tearing
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Red Eye Differentials
Tarsal Conjunctival FB
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Adnexal Eye Disease
Staph blepharitis: chronic
Inflamed eye lids
Swollen eye lids
Oily discharge
Eyelashes clump
together
Forms COLARETTE
around eyelash
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Adnexal Eye Disease
Seborrheic Blepharitis
Dry, flaky lashes
Red lid margins
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Adnexal Disease
External Hordeolum
Focal Staph infection
Red and painful
Acute swelling of
glands of zeiss and
moll also meibomian
glands
Points towards skin May be quite large
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Adnexal Disease
Internal Hordeolum
Meibomian gland
Points towards
conjunctiva
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ADNEXAL DISEASE:
Chalazion
Eyelids
± Chalazion: focal,chronic,granulomatousinfection of meibomiangland
Large non tender lidmass
May be chronic result of hordeolum
r/o sebaceous cellcarcinoma
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Adnexal Eye Disease: Potentially
Life Threatening
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ADNEXAL DISEASE
Lacrimal system
± Dacryocystitis
Results from
obstruction of
nasolacrimal duct
Pain, edema, erythema
over lacrimal sac
Discharge from puncta
is sign of infection
Ad l Di
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Adnexal Disease
Nasolacrimal Duct Obstruction
Most common
congenital
abnormality
May be transient
May open in 3 weeks
Tears and mucus
may accumulatewhich may result into
dacryocystitis
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Protrusions
Exophthalmos
± Forward protrusion of
globe
± Retraction of lids ± r/o leukemia in kids
Orbital mass
± Chemosis
± Hyperemia of conj
± Prolapse over lid
± Fixed eye: no EOM
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Protrusion: Life Threatening
Tumors
± Melanoma
± Retinoblastoma
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STRABISMUS
Phoria ± Latent tendency for misalignment
± May elicit problem by covering eyes alternately
TROPIA ± manifest when both eyes open
ESOphoria/tropia: eyes directed inwards
EXOphoria/tropia: eyes directed outwards
Vertical ± hyper and hypo
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Strabismus
3rd Cranial Nerve Paresis
Ptotic lid
Failure to adduct
Failure to elevate
OS: Abnormal eye
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Strabismus
6th Cranial Nerve Paresis
Failure to abduct
Eyes are straight inadduct gaze and
directly ahead
OS: Abnormal eye
OD: Abnormal eye: fails to abduct
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COMMON ER CASES
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TAKE VISUAL ACUITY
before examining the eye
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Chemical burn:
can lead to blindness Differentiate between acid and alkali
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ALKALI
Ammonia (NH2): fertilizers, cleaning
agents
Lye (NaOH): drain cleaners
Potassium hydroxide
Magnesium hydroxide: sparklers, flares,
firecrackers
Lime: plaster, cement, whitewash, mortar
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CHEMICAL BURN:
TRUE OCULAR EMERGENCY
Alkali Alkali more serious than acid burn
The whiter the eye the poorer the prognosis
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Acid
Sulfuric acid: car battery, industrial acid
Hydrochloric acid/muriatic acid: bathroom
cleanser, household acid
Nitrous acid
Hydrofluoric acid
Acetic acid (>10%)
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Chemical Burn: Acid
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Chemical Burn:
Initial ER Management Topical anesthetic
Copious irrigation with balanced saline solution
Check for retained foreign bodies, chemical
precipitates. Flip lids and swab fornices. Topical cycloplegics (atropine sulfate 1%), TID
Topical antibiotics (broad spectrum such asfluoroquinolones), q4 hours
Patch eye Prompt referral to ophthalmologist
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Sudden, painless, profound
loss of vision!
Always consider vascular
etiologies.The other true eye emergency!
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CRAO:
Central Retinal Arteriole Occlusion1. Afferent pupillary
defect is profound or
total
2. Extensive retinal edema
(pale retina)
3. Cherry-red/aratiles spot
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CRAO: ER MANAGEMENT
Ocular massage (digital or 3-mirror lens): 10seconds ON, 5 seconds OFF
Induce hypercarbia: re-breath CO2
Sublingual isosorbide dinitrate 10 mg Lower eye pressure: acetazolamide 500 mg,
mannitol 20%, oral glycerol 50% (1 g/kg)
Anterior chamber paracentesis
IV streptokinase Prompt referral to ophthalmologist
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Corneal Foreign Bodiesand
Abrasion
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CORNEAL FB AND ABRASION
Common complaint at the ER
Usually work related (grinding,
hammering, chipping, etc.)
Accidental trauma (blast, insect, fingernail,
etc.)
Pain, tearing, redness, FB sensation,
photophobia, lid swelling
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CORNEAL FB: METAL
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CONJUNCTIVAL FB
This is how you flip upper lid. Foreign body has been removed.
CORNEAL FB & ABRASION
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CORNEAL FB & ABRASION
ER MANAGEMENT Put topical anesthetic for exam purpose only
Examine under strong light and magnification
Remove FB with forceps or cotton swabs if
possible
May irrigate with sterile saline solution
Cover with broad spectrum topical antibiotics
(every 1 hour) Place semi-pressure eye patch
Prompt referral to ophthalmologist
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Perforating Injuries of the Eye
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PERFORATING INJURIES
One of the most common reason for admissionto eye ward at PGH
Majority of patients are male and children (30%)
are common Work or play related, assault and accidentaltrauma
Corneal, limbal, corneo-scleral, scleral etc.
Intraocular structures are usually involved Common cause of endophthalmitis and
blindness
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Perforating Injuries
Sharp objects: wire, walis ting-ting, BBQ
stick, needles, knives, scissors etc.
Projectiles: metal fragment, nail, glass
fragment, dart etc.
Blasts: firecrackers explosion, gun blast,
dynamite, pillbox etc.
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Intraocular FB: IOFB
Metallic Intraocular FB with vitreous hemorrhageNote: no protective eye goggles
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Globe Perforating Injury
Do not extract: Will need xrays to determine extent of penetration
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Corneal Perforating Injury: CPI
Prolapsed iris, peaked pupil,Peaked pupil, r/o incarcerted iris
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Scleral Perforating Injury
P f ti I j
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Perforating Injury:
ER Management Determine nature of trauma and extent of injury
Give anti-tetanus regimen
Start broad spectrum topical and systemic
antibiotic therapy
Eye shield
Avoid manipulation or pressure on the eye
Prompt referral to ophthalmologist
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Contusion Injuries of the Eye
(blunt trauma)
Closed Globe Injury
Open Globe Injury
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Blunt Closed Globe Injury
Subconjunctival Hemorrhage Contusion Hematoma
Subconjunctival Hemorrhage
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Subconjunctival Hemorrhage
r/o blunt closed injury r/o valsalva related r/o HPN
Subconjunctival Hemorrhage,
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Subconjunctival Hemorrhage,
Contusion Hematoma:
ER Management Closed globe injury
Vision may be affected with ³Berlin¶s
Edema´ / ³Commotio Retinae´ Conservative management
Cold compress for the first 24 hours
Warm compress on succeeding days Resolution in 7 to 14 days
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Blunt Globe Injury: Hyphemar/o Occult Ruptured (open) globe
Grade 3 Hyphema 8-Ball Hyphema
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Hyphema: ER Management
High back rest
Limit activity
Eye shield Topical cycloplegic (atropine sulfate)
Monitor eye pressure
Prompt referral to ophthalmologist
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Ruptured Eyeball: Occult
HISTORY!, BOV, Severe conjunctival hyperemia, Eccentric pupil , Very
deep anterior chamber, hyphema, hypotonia
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Ruptured Eyeball
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Ruptured Eyeball
Blunt Globe Injury: Ruptured
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Blunt Globe Injury: Ruptured
eyeball/ Open globe injury Determine nature of trauma and extent of
injury
Eye shield
Broad spectrum topical and systemic
antibiotics
Avoid any pressure on the eye
Prompt referral to ophthalmologist
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Urgent Red Eye Conditions
Acute red eye problems seen at
the emergency room
URGENT because it may be
possible to save vision
ACUTE ANGLE CLOSURE
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ACUTE ANGLE CLOSURE
GLAUCOMA: AACG Severe eye pain and BOV
R edness, congestion,
injection
Headache, nausea, vomiting
mid-dilated, non-reactive
pupil
firm to hard eyeball
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AACG
NORMAL EYECiliary conj congestion,Mid-dilated
pupil, corneal edema, pain,
haloes, photophobia
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AACG: ER Management
Acetazolamide 500 mg, IV Mannitol 20%
(1 g/kg), oral glycerol 50% (1 g/kg)
Topical beta-blocker
Prompt referral to ophthalmologist
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Gonorrheal Conjunctivitis
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Gonorrheal Conj: ER Mgt
Irrigate with sterile normal saline solution
Take precautionary measures to avoid spread
Ceftriaxzone 250 mg IM (neonate); 500 mg to 1
gm IM (adult); single dose Ciprofloxacin: 250 mg single dose; 100 mg BID
Azithromycin: 1 gm single dose
Prompt referral to ophthalmologist
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RETINOBLASTOMA
0-2 y.o. cat¶s eye reflex, squint, glaucoma, dilated pupil, extruding eyeball
REFER IMMEDIATELY TO A TERTIARY CENTER
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OCULAR PHARMACOLOGY
The succeeding slides are all
included in the handouts. If
preferred, lecture of this section
may be deferred.
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Drug Administration Routes
Topical: Anterior ± Drops, Suspensions, gels, ointments
± Low concentration in Posterior Chamber
Local Injection: Anterior & Posterior ± Injections, delivery devices
± Subconjunctival, Subtenons, Retrobulbar
± Intracameral, (anterior chamber) Intravitreal (vitreouscavity)
± Used for drugs with poor corneal penetration
± Higher risk and more apprehension
Systemic: Anterior & Posterior ± Oral, intravenous
± Has to penetrate blood ocular barrier
Commonly Used Ocular
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Commonly Used Ocular
Therapeutic Drugs
Glaucoma or IOP lowering drugs
Antibiotics
Anti-inflammatory
Anti-allergy
Decongestants/Lubricants
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IOP Lowering Drugs
Beta blockers
Cholinergic stimulators
Adrenergic stimulators Carbonic Anhydrase Inhibitors
Prostaglandin analogs
Hyperosmotics
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Beta-Adrenergic Blockers
Block ß2 receptors in
ciliary processes
Reduce aqueous
secretion May protect optic
nerve
Side effects:
± Bradycardia
± asthma
Timolol
Betaxolol
Levobunolol
Metripranolol
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Cholinergic Agonists
Increase outflow of
aqueous
Open trabecular
meshwork Side effects
± Pupil constriction
± Decreased vision
± Myopia
Pilocarpine
Carbachol
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Adrenergic Agonists
Apraclonidine ± Decrease aqueous production
± Increase trabecular outflow
± Increase uveoscleral outflow
Brimonidine ± Decrease aqueous production
± No effect on tracular meshwork
± Increase uveoscleral outflow
Adrenergic Agonists:
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Adrenergic Agonists:
Adverse Effects Apraclonidine
± Frequent ocular
allergy
± Arrythmias ± Restricted use
± Eye redness
± Hypotension
Brimonidine
± Headaches
± Fatigue
± Hypotension
C b i A h d I hibi
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Carbonic Anhydrase Inhibitors
Block CAI enzyme
needed to produce
aqueous
SE: paresthesias,
tiredness, constipation or diarrhea
Renal stones, acidosis
Aplastic anemia
Stinging for drops
Oral
± Acetazolamide
± Dichlorphenamide
± Methazolamide Topical
± Dorzolamide
± Brinzolamide
P t l di A l
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Prostaglandin Analogs
Novel drug
Increase uveoscleral
outflow
SE: hyperemia, Irishyperpigmentation,
ocular inflammation
No systemic effects
Have become #1 Rx
Additive with other Rx
Latanoprost
Travoprost
Bimatoprost
A ti i bi l
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Antimicrobials
Antibacterials
Antifungals
Antivirals
Antiparasitics
A tib t i l
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Antibacterials
Aminoglygosides ± Tobramycin
± Gentamycin
± Vancomycin
± Neomycin
Erythromycin
Polymyxin B
Chloramphenicol Sulfacetamide
Fusidic acid
Fluoroquinolones =
broad spectrum
± Ciprofloxacin
± Ofloxacin ± Levofloxacin
± Gatifloxacin
± Moxifloxacin
A ti i fl t St id
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Anti-inflammatory: Steroids
Highly potent
Affect several areas
of inflammation
± Decreaseprostaglandins
± Decrease leucocyte
activity
± Preserve membranepermeability
± Anti-angiogenic
± Inhibit wound healing
Ocular SE
± Cataract
± IOP elevation
± Infections ± Delayed Wound
Healing
St id
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Steroids
Topical
± Prednisolone acetate
± Dexamethasone
± Fluoromethalone ± Rimexalone
± Loteprednolone
Soft steroid, less risk of
increased IOP
Local Injection
± Anecortave Acetate
± Triamcinolone
± Methylprednisolone Systemic
± Prednisone
± Methylprednisolone
± Dexamethasone
NSAID
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NSAID
Decrease
Prostaglandins
Decrease
leukotrienes Fewer ocular side
effects than steroids
Cause GI discomfort
Ocular preparation
± Diclofenac
± Ketorolac
± Indomethacin ± Ketotifen
A k l d t
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Acknowledgement
Dr. Teresita Castillo
Dr. Alex Tan
Dr. Harvey Uy
Dr. Milagros Arroyo
Dr. Ma. Florentina Gomez
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Thank you!
Good Luck!
STUDY!
Enjoy!